Document:

EX-10.18

 Exhibit 10.18 

EMPLOYMENT AGREEMENT 
 This
EMPLOYMENT AND NON-COMPETE Agreement (this “Agreement”) is made and entered by and between Unimin Corporation, a Delaware Corporation, whose corporate headquarters is
located in New Canaan, Connecticut (the “Company”), and Scott Preston, a resident of Fairfield County, Connecticut (“Employee”) (each, a
“Party,” and collectively, the “Parties”), to be effective as of February 29, 2016 (“Effective Date”). 

STATEMENT OF PURPOSE: 

A.    The Company is a global leader in the production, processing and distribution
ofnon-metallic industrial minerals (the “Industry”). The Company is engaged, at facilities throughout North America, in the business of mining, processing, transporting,
marketing and selling general industrial sand, glass sand, foundry sand, frac sand, ground silica, tightly screened specialty sand, high purity quartz, lime, microcrystalline silica, resin coated sand, nepheline syenite, ball clay, air floated
kaolin, and other industrial minerals, and is also engaged in the providing railroad freight common carrier services (collectively, the “Business”). 

B.    Employee has been offered employment by the Company effective February 29, 2016, in the position of
Chief Operating Officer, North America. In the course of such employment, Employee will have access to Confidential Information and Trade Secrets (as defined herein) belonging to the Company. Employee will also have access to information about the
Company’s customers and prospective customers and customer relationships, and will gain the ability to influence the goodwill of the Company necessary to the success of the Business. Employee recognizes that the Company’s Trade Secrets,
Confidential Information, customer relationships and goodwill are assets deserving of protection as provided for in the covenants contained in this Agreement. 

C.    The Company desires to retain the full-time services of Employee, and Employee desires to serve the Company
upon the terms and conditions set forth herein. The Company desires to provide additional benefits to Employee, to which Employee was not previously entitled, as consideration for the covenants in this Agreement and Employee desires to be so
employed by the Company under the terms and restrictions set forth herein. 

  
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 NOW, THEREFORE, in consideration of Employee’s employment with the Company on the terms and
conditions set forth herein, and the promises, mutual covenants, and agreements hereinafter contained and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Company and Employee, intending to be
legally bound, hereby agree and covenant as follows: 
 1.    Employment and Position. The
Company hereby employs Employee and Employee hereby accepts employment and agrees to serve the Company in the position of Chief Operating Officer, North America, with duties consistent with the role of Chief Operating Officer, North America, and
such other duties as are from time to time assigned to him by the Company’s President consistent with Employee’s position. 

2.    Combination / Successorship. In the event of any transaction involving the
combination of the Company or all or substantially all of the Company’s Business, with any other entity or business, whether direct or indirect and whether by purchase, merger, consolidation, liquidation or otherwise, (such combined entity
referred to herein as “Successor Entity”), Employee’s assignment for any Successor Entity shall be (a) to serve as Chief Operating Officer of the Business owned by the Company immediately prior to such transaction.
with duties consistent with those theretofore performed by him, and (b) to serve the Successor Entity in such other capacities as its President shall from time to time determine consistent with Employee’s position. Any Successor Entity
shall assume the obligations under this Agreement and agree expressly to perform obligations under this Agreement. 

3.    Term of Employment. The initial term of this Agreement shall be for a three
(3) year term commencing on the Effective Date and shall terminate on March 1, 2019, subject to the provisions of Sections 8 and 9. Thereafter, the term of this Agreement shall automatically renew for successive one (1) year terms
(Renewal Term) unless the Company provides written notice to Employee at least sixty (60) days in advance of the then-existing term that it does not wish to renew the term of this Agreement. The initial and any successive one year Renewal Terms
shall hereinafter be referenced as “Employment Term.” 
 4.    Exclusive Employment and Duty of
Loyalty to Company. During the Employment Term, Employee will serve the Company exclusively, faithfully and to the best of his ability, devoting all of his work time, energy and skill to the business of the Company (with the exception
of absences because of sickness and because of vacations and holidays as provided in 

  
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Section 5 hereof), and shall owe a duty of loyalty to the Company. During the Employment Term, Employee shall not engage in any business for Employee’s own account and shall not accept
any employment whatsoever from any person, firm or corporation other than the Company, unless Employee has received prior express written approval of the Company. Nothing herein shall prevent Employee from serving on a
non-profit board or in another similar community or organizational position so long as such service does not interfere with the performance of Employee’s duties and responsibilities hereunder.
Additionally, Employee may serve in a compensated corporate board position so long as (I) such position does not present a conflict of interest with his fiduciary responsibilities to the Company, (2) such service does not interfere with
the performance of Employee’s duties and responsibilities hereunder, and (3) Employee receives prior written approval from the Company to serve in such position, which approval shall not be unreasonably withheld. 

5.    Compensation and Benefits. 

(a)    As basic compensation for his services under this Agreement during the Employment Term, the Company shall
pay to Employee salary at the rate of not less than Four Hundred Thousand dollars ($400,000) per annum through March 1, 2019 provided, however, that Employee shall receive an annual review to determine the customary merit-based salary
adjustments as determined by the President. Salary shall be payable in substantially equal semi-monthly installments. 

(b)    Employee shall be a participant in the Incentive Bonus Plan For Key Personnel (“Bonus
Plan”) during each year of Employee’s Employment Term. The maximum target opportunity for Bonus Plan compensation shall be set at not less than fifty percent (50%) of Employee’s then current salary for each calendar year of
participation under the Bonus Plan, provided, however. that the amount of any Bonus Plan compensation actually awarded to Employee shall be determined in accordance with the Bonus Plan then in effect. The Remuneration Committee of the Board of
Directors of SIBELCO (“Remuneration Committee”), or their designees or successors in interest may, at any time or from time to time, change the formula for providing Bonus Plan compensation to Employee, provided that
(i) the new formula is designed to result in a total amount of Bonus Plan compensation reasonably similar to the Bonus Plan compensation provided under the formula in existence prior to any such change, (ii ) most of the other officers and
Executive Management Group (“EMG”) level executives of the Company who are provided Bonus Plan compensation shall, at the same time or previously, have their Bonus Plan compensation arrangement changed to one computed in the same general
manner (although with different rates of pay-out) as the new Bonus Plan compensation formula applicable to Employee, and (iii) the Company shall provide written notice to

  
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Employee of this change in the Bonus Plan compensation formula prior to January 1st of the year as to which the new Bonus Plan compensation
formula applies. The Company agrees that Employee’s compensation under the Bonus Plan shall not be prorated for 2016. 

(c)    The Company shall recommend to the Remuneration Committee that Employee participate in the Sibelco Long Term
Incentive Plan (“SLTIP”). If approved for participation, Employee shall participate in the SLTIP for the time period(s) and under the terms and conditions set forth therein and under the terms of any letter(s) granting
rights under the SLTIP. 
 (d)    Employee shall receive all the life insurance, company automobile, dental insurance,
hospitalization and medical insurance, medical reimbursement, pension, retirement and other pension and/or welfare benefits now in effect and hereafter granted to other EMG level executive employees of the Company other than the President, in
accordance with the Company’s standard policies as they exist from time to time. 
 (e)    Employee shall be
entitled to four weeks of vacation (20 working days) during each calendar year of the Employment Term, which shall not be prorated in 2016 and which may be taken at such time as Employee desires, consistent with the business needs of the Company.
Employee also shall be entitled to all paid holidays provided to other employees, consistent with Company policy then in effect. 

(f)    The Company shall pay to Employee a one-time
lump-sum “sign-on” payment of $90.000. Such payment shall be made within 3 business days following Employee’s first day of employment (i.e. on or before
March 2, 2016), provided Employee reports to work on February 29, 2016 as contemplated by this Agreement. 

6.    Place of Employment. The principal place of employment of Employee during the Employment
Term shall be in Fairfield County, Connecticut. The Company shall promptly reimburse Employee for all reasonable and necessary traveling expenses and other disbursements incurred by him for or on behalf of Company in the performance of his duties
hereunder. For such purposes, Employee shall submit to the Company itemized monthly reports of such expenses and other disbursements. 

7.    Protection of Confidential Information. 

a)    Employee expressly recognizes and acknowledges that in connection with Employee’s employment with the Company,
Employee has been given access to and will continue to be given access to certain valuable, highly-sensitive confidential and proprietary information belonging to the 

  
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Company (“Confidential Information”). Employee expressly recognizes and acknowledges that Confidential Information shall include, but not be limited to, the following
categories of information and material, regardless of how such information or material may exist from time to time and whether such information exists in memory of Employee, or in electronic, print, or other form. and including all copies, notes, or
other reproductions or replicas thereof, all of which constitute valuable, special, and unique assets of the Company that have been developed or acquired through substantial investments of time, money, and resources, excluding such information that
is otherwise generally available to the public or in the public domain through no unauthorized act or omission of Employee: 

i)    any and all information relating to the Company. its Business and associated methods of production, operation.
technology, or marketing, including, but not limited to, business plans, engineering processes, construction processes, strategic plans, forecasts. financial information or data, marketing information or data, research and development, business
account lists, customer lists (including customer names and contact information), customer information (including customer preferences, pricing, buying habits and needs and the methods of fulfilling those needs), employee lists (including skills,
ability and compensation of employees other than Employee), vendor or supplier lists, licensor or licensee lists, contractor lists, records relating to any intellectual property owned by, controlled, or maintained by the Company related to the
Business, and any and all other records pertaining to the Business which the Company may, from time to time, designate as confidential or proprietary or that Employee reasonably knows should be treated or has been treated by the Company as
confidential or proprietary and is related to the Business. 
 ii)    any and all information not publicly available,
relating to the Company’s products at any stage of the product’s mining or processing or final form, including without limitation, information which relates to any of the following concerning the mining, processing or selling of any of the
Company’s products: specific technical matters; processing or refining methods of mined materials to produce the Company’s products, information concerning machinery or equipment or techniques used (or being considered for use) in any
stage of mining or processing the Company’s products; research methods; pilot plant methods; quality control methods and tests; profit margins; production costs; identities of customers; prices charged to various customers; marketing plans: ore
control methods; and geological data; and 
 iii)    any and all information of a technical or proprietary nature
developed by or acquired by the Company or made available to the Company and its employees by any licensor, 

  
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licensee, customer, utility, supplier, vendor, employee, contractor, sub-contractor, or government agency, on a confidential basis or protected basis and
related to the Business or the Company’s products, including but not limited to any scientific or technical analyses, ideas, concepts, designs, specifications, requirements, prototypes, techniques, technical data or know-how, formulae, methods, discoveries, improvements, equipment, research and development, and inventions related to the Business or the Company’s products: 

b)    Employee acknowledges that Confidential Information is and will continue to be of central importance to the Business
of the Company, and that disclosure of any such information to, or its use by, others could cause substantial harm to the Company and its affiliates. Therefore, in consideration of his continuing employment and the additional consideration being
provided under this Agreement, Employee agrees that Employee shall not disclose any Confidential Information to disclose or reveal to any person, firm or corporation (other than to employees of the Company, its parent corporation, SCR-Sibelco NV, or any of their subsidiaries and only as required on a need-to-know basis in the performance of such employee’s
duties) or use (except as required in the performance of his duties hereunder) any Confidential Information and/or Trade Secrets (as defined below) except on behalf of the Company, at any time during Employee’s employment with the Company, or
at any time thereafter. For purposes of this Agreement, the term “Trade Secret” means (i) any item or information (including, but not limited to Confidential Information) that constitutes a trade secret of the Company
under applicable law. The Parties acknowledge and agree that this Agreement is not intended to, and does not, alter either the Company’s rights or Employee’s obligations under any state or federal statutory or common law regarding trade
secrets and unfair trade practices. 
 c)    Employee agrees not to remove from the premises of the Company, except in
pursuit of business for the benefit of the Company, any document or object containing or reflecting any Confidential Information. All such documents and objects shall remain property of the Company. All drawings, plans, sketches, blueprints,
layouts, product descriptions and process descriptions made, or caused to be made, by Employee in the course of Employee’s work for the Company or in the course of preparing advice to give to the Company (including all originals and copies
thereof) shall be considered exclusive property of the Company. Employee further agrees to promptly surrender to the Company upon request during Employee’s employment with the Company and immediately upon the Termination Date, all Confidential
Information and any other Company property of any kind, existing in any tangible, print or electronic form, in Employee’s possession or under Employee’s control, 

  
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including all passwords used by Employee to access facilities, networks, or phone systems of the Company. Employee also expressly agrees that immediately upon the Termination Date, Employee shall
cease using any secure website or web portals, e-mail system, or phone system or voicemail service of the Company. 

d)    Nothing in this section prevents the disclosure of information which Employee is required to disclose by applicable
law, governmental regulation or legal process; provided however, Employee shall give the Company prompt notice of the service of subpoena or legal process requiring such disclosure so that the Company may seek a protective order or other legal
remedy to prevent disclosure, and Employee shall disclose only such information to such recipients in such fashion as is required by such process. 

e)    It is acknowledged and agreed that any breach or threatened breach of the provisions of this Section 7 would
cause irreparable injury to the Company and that money damages would not provide an adequate remedy to the Company. In the event of a breach or threatened breach by Employee of this Section 7, the Company shall be entitled to an injunction
restraining Employee from disclosing any Confidential Information or Trade Secrets. 
 f)    Nothing contained in this
Section 7 shall be construed as prohibiting the Company from pursuing any other equitable or legal remedies for any such breach or threatened breach, including recovery from Employee of any monetary damages that the Company may suffer by reason
of any such breach or threatened breach. 
 8.    Covenant Not to Compete. 

a)    Employee understands and agrees that the purpose of this Section 8 is solely to protect the Company’s
legitimate business interests, including, but not limited to the Company’s Confidential Information and Trade Secrets, customer relationships and goodwill, and the Company’s competitive advantage within the Industry in the operation of the
Business and production of the Products. This Section 8 is not intended to impair, nor will it impair, Employee’s ability or right to work or earn a living. 

b)    Therefore, to the fullest extent permitted by applicable law, Employee agrees that during Employee’s continuous
employment with the Company (including any leave or severance periods), and during the Non-Competition Period, Employee shall not, without the prior written consent of the Company, directly or indirectly,
obtain or hold a Competitive Position with a Competitor in the Restricted Territory, as these terms are defined herein. 
  

	 	(i)	 For purposes of this Agreement, a “Competitive Position” means any employment with or

  
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services performed (whether as owner, member, manager, lender, partner, shareholder, consultant, agent, employee, co-venturer, or otherwise) for a
Competitor in which Employee 

  

	 	(A)	will use or disclose or could reasonably be expected to use or disclose any Confidential Information or Trade Secrets for the purpose of providing, or attempting to provide, such Competitor with a competitive advantage
in the Business; 

  

	 	(B)	will hold a position, or will have duties, the same as or substantially similar to the those held by Employee when Employee was employed with the Company; 

 

	 	(C)	will advise or assist a Competitor concerning techniques and methods for the production of the products or services directly competing with the Company’s products or services; 

 

	 	(D)	will market, sell or assist in the production of products or services marketed, sold or produced by the Company (or their commercial equivalents) in competition with the Company. 

 

	 	(ii)	For purposes of this Agreement, “Competitor” means or includes : 

  

	 	(A)	any third party whose business or a major segment thereof is the same as or substantially similar to the Company’s Business and who is engaged in direct competition with the Company; or 

 

	 	(B)	any third party who owns or operates. intends to own or operate, or is preparing to own or operate a subsidiary, affiliate, or business line or business segment whose business is or is expected to be the same as or
substantially similar to the Business of the Company and in direct competition with the Company. 

  

	 	(iii)	For purposes of this Agreement, “Restricted Territory” means: 

 with
respect to any location operated by the Company in connection with the Business (except railroad freight common carrier services) concerned with selling a product or service which is sold by the Company from that location, the area within the
smallest circle which can be drawn with that location as its center such that there is included within the circle the locations which receive shipments of that product (or which receive that service) from the Company representing 80% of the
Company’s revenues with regard to that product; (ii) with respect to a Business (except railroad freight common carrier 

  
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services) concerned with selling a product which is sold by the Company from more than one location, the area within each circle drawn such that the circles are the smallest which can be drawn
with each such location as the center of a circle, and there is included within each circle the locations which receive shipments of that product (or which receive that service) representing 80% of the Company’s revenues with regard to that
product (or service) from that location; and (iii) with regard to the Business of railroad freight common carrier services, the area within five miles of a railroad line operated by the Company. For purposes solely of this paragraph,
“Company” includes (a) Unimin Corporation and (b) all companies or entities at least 50% owned or controlled by Unimin Corporation. 

(iv)    For purposes of this Agreement, the “Non-Competition
Period” means the one 
 (1) year period immediately following the earlier of (1) the end of the Employment Term or
(2) termination of this Agreement for any reason. 
 c)    Notwithstanding the foregoing, Employee may, as a
passive investor, own capital stock of a publicly held corporation, which is actively traded in the over-the-counter market or is listed and traded on a national
securities exchange, which constitutes or is affiliated with a Competitor, so long as Employee’s ownership is not in excess of two percent (2%) of the total outstanding capital stock of the Competitor. 

d)    Notwithstanding any other provision of this Agreement, in the event of Employee’s actual or threatened breach
of any provisions of Section 8, the Company shall be entitled to an injunction restraining Employee from such breach or threatened breach, it being agreed that any breach or threatened breach of these restrictive covenants would cause immediate
and irreparable injury to the Company and that money damages would not provide an adequate remedy to the Company. Nothing herein shall be construed as prohibiting the Company from pursuing any other equitable or legal remedies for such breach or
threatened breach, including the recovery of monetary damages from Employee. 
  

	 	9.	Restrictive Covenants are Essential and Independent Covenants; Severability; Blue-Penciling; Employee Acknowledgements. 

a)    The covenants set forth in Sections 7-10 are essential elements of this
Agreement and shall be construed as agreements independent of any other provision in this Agreement, and 

  
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the existence of any claim or cause of action of Employee against the Company, whether predicated on this Agreement or otherwise, shall not excuse Employee’s breach, or constitute a defense
to the enforcement by the Company, of these restrictive covenants. The Company and Employee have independently consulted their respective counsel and have been advised in all respects concerning the reasonableness and propriety of such covenants,
with specific regard to the nature of the business conducted by the Company. 
 b)    Should any part or provision of
any covenant be held invalid, void, or unenforceable in any court of competent jurisdiction, such invalidity, voidness, or unenforceability shall not render invalid, void, or unenforceable any other part or provision of this Agreement. 

c)    If any provision or portion of the provisions of Sections 7 or 8 is found to be invalid or unenforceable by a court
of competent jurisdiction because its duration, territory, definition of activities, or definition of information covered is considered to be invalid or unreasonable in scope, the invalid or unreasonable terms shall be redefined to carry out the
Company’s and Employee’s intent in agreeing to these restrictive covenants. The Parties hereto agree to the modification of such provision, so that the court making such determination shall have the power to modify such provision, to
reduce the duration or area of such provision or both, or to delete specific words or phrases (“blue-penciling”), and, in its reduced or blue- penciled form, such provision shall then be enforceable and shall be
enforced. 
 d)    Employee acknowledges and agrees that: 

 

	 	(i)	the services to be performed by Employee under this Agreement are of a special, unique, unusual, extraordinary, and intellectual character; 

 

	 	(ii)	the restrictive covenants contained in this Agreement are necessary to protect the Company’s legitimate business assets and interests, and these covenants were discussed with, and accepted by, Employee prior to
Employee’s employment with the Company under this Agreement; 

  

	 	(iii)	the restrictive covenants contained in this Agreement are reasonable in time, territory, and scope, and in all other respects; 

  

	 	(iv)	the restrictive covenants contained in this Agreement constitute a material inducement to the Company entering into this Agreement, without which the Company would not have entered into this Agreement to employ Employee
on the terms and conditions stated herein: 

  

	 	(v)	 additional consideration for the restrictive covenants contained in this

  
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Agreement, are above and beyond the consideration provided to Employee for Employee’s employment prior to the Effective Date, and above and beyond what Employee would otherwise be entitled
to, is provided to Employee herein as good and valuable consideration for the obligations and duties of Employee hereunder. 

10.    Notification about Restrictive Covenants. Employee hereby consents to the Company’s
notification of persons or entities of Employee’s obligations under this Agreement if the Company believes that Employee’s activities with such person or entity are likely to be restricted by this Agreement. 

11.    Termination. 

(a)    The Employment Term shall in any event terminate (i) upon the death of Employee, or (ii) in the event
Employee is unable to perform his duties hereunder for a period of twelve (12) consecutive months because of physical or mental disability. All questions arising under this Agreement with regard to physical or mental capacity or incapacity of
Employee to perform his duties hereunder shall be determined by a reputable physician mutually selected by Company and Employee or his personal representatives at the time such questions arise. In the case of termination of the Employment Term by
Employee’s death or physical or mental disability. his personal representatives shall be entitled to receive, in accordance with the terms of this Agreement, (i) basic compensation earned hereunder to the date of such termination and not
theretofore paid, (ii) 100% of any unpaid Bonus Plan Compensation awarded to Employee for work performed in the year prior to termination of employment by reason of Employee’s death or disability (without regard to any provision of the Bonus
Plan requiring employment at time of payment), (iii) 100% of the maximum Bonus Plan Compensation that could have been earned by Employee in year of termination of employment by reason of death or disability, multiplied by a fraction, the numerator
being the number of days Employee was employed by the Company during the year of termination of employment by reason of death or disability, and the denominator being 365, and (iv) fifty percent (50%) of his basic compensation for a two-year period following such termination. In the case of a payment due in respect of only a part of a calendar year. a pro rata share of the total amount due for such calendar year shall be based in the proportion
of the number of days of such part of such calendar year to 365. It is understood that the payments in this Section 11 are in addition to any payments Employee or his heirs receive or are entitled to receive from life insurance, health,
accident or other insurance policies then in effect at the Company and in which Employee is 

  
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enrolled. 
 (b)    In addition to termination as provided in the
foregoing paragraph, either party shall have the right to terminate the employment of Employee under this Agreement for any reason or for no reason, with or without cause, at any time during the term of this Agreement, provided. however, that in the
event of any such termination by the Company or Resignation by the Employee for “Good Reason” (as defined below), the Company will pay Employee one year’s pay at the base compensation salary rate then in effect pursuant to
Section 5, payable in 24 equal semi-monthly installments beginning one month after the end of the Employment Term. No other payments or benefits, except those that may be required by statute or regulation (such as continued health coverage
under COBRA), shall be payable to Employee in the event of termination of this Agreement by the Company pursuant to this Section 11(b). As used herein, “Good Reason” shall include a substantial and material diminution in
Employee’s duties or responsibilities that following Employee’s timely notice to the Company that the Company fails to correct within sixty (60) days, assignment of duties that are determined by a court of competent jurisdiction to be
illegal, or relocation of the Place of Employment more than 60 miles from New Canaan, Connecticut. 

12.    Severance Upon Expiration of Agreement. If the Company notifies the Employee that it does not
wish to renew this Agreement, then, commencing on the day after the end of the Employment Term, the Company will pay Employee (i) one years’ pay at the base compensation salary rate in effect pursuant to Section 5 at the end of the
Employment Term, payable in 24 equal semi-monthly installments beginning one month after the end of the Employment Term, and (ii) for the twelve (12) months following the end of the Employment Term, the Company will provide to Employee and
his dependents medical and hospitalization insurance coverage, dental insurance coverage, like insurance coverage, accidental death and dismemberment insurance coverage and long-term disability coverage, to the extent (but only to the extent) that
such coverage is at that time customarily provided by the Company to its salaried employees (or, at the option of the Company, the Company will provide substantially similar coverage), with Employee bearing solely costs equivalent to the normal
employee contributions then applicable to the Company salaried employees with regard to such insurance coverages. If the Employment Term ends following written notification by the Company that it does not wish to renew the Agreement, the Company
will pay Employee the Bonus Plan Compensation that would be awarded to Employee for work performed in the year in which the Employment Term ends, without regard to any provision of the Bonus Plan requiring employment at time of payment.
Employee’s rights under this Section 12 shall not in any way be limited by or 

  
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contingent upon Employee mitigating damages or seeking other employment. No earnings of Employee or benefits received by Employee through employment with another employer shall in any way be
considered an offset to the Company’s obligation to make the payments and provide the benefits specified in this Section 12. 

13.    The Company’s Rights to Inventions and Other Intellectual Property. 

(a)    Employee hereby assigns to the Company all of Employee’s rights. title. and interest (including, but not
limited to all patent. trademarks, copyright. and trade secret rights) in and to all Work Product (as defined below) prepared or developed by Employee, made or conceived in whole or in part by Employee within the scope of Employee’s employment
by the Company, or that involve the use of Confidential Information or Trade Secrets within six (6) months thereafter. Employee further acknowledges and agrees that all copyrightable Work Product prepared by Employee within the scope of
Employee’s employment by the Company are “works made for hire” and, consequently, that the Company owns all copyrights thereto. 

(b)    Employee represents and warrants to the Company that all work that Employee performs for or has performed for the
Company. and all Work Product that Employee produces which includes, but is not limited to. software. copyrights, trademarks. domain names, domain name registrations, documentation, memoranda, ideas, designs, inventions, processes, new developments
or improvements and algorithms (“Work Product”), will not knowingly infringe upon or violate any patent. copyright, trade secret. or other property right of Employee’s former employers or of any other third party. Employee will not
disclose to the Company, or use in any of Employee’s Work Product, any confidential or proprietary information belonging to others, unless both the owner thereof and the Company have consented. 

(c)    Notwithstanding the other provisions of this Section 13, Employee shall not be required to assign. transfer,
or convey to the Company any of the rights, title, and interest Employee may have in any Work Product that Employee invents. discovers. originates, makes. or conceives during Employee’s employment by the Company if and only if (i) no
equipment, supplies, facilities. Confidential Information, or Trade Secrets are used in the creation of the Work Product, (ii) the Work Product was developed entirely on Employee’s own time, (iii) the Work Product does not relate
directly to the Business and production of the Products or to the Company’s actual or demonstrably anticipated research or development, and (iv) the Work Product does not result in any way from any work performed by Employee for the
Company. 
 14.    Physical Examination. At the request of the Company, Employee shall submit

  
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to any physical examination and/or provide personal medical history to any insurance company to which the Company shall have made application for insurance to fund the Company’s obligations
under this Agreement. This Agreement is personal in its nature and neither of the parties hereto shall, without the written consent of the other, assign or transfer this Agreement or any rights or obligations hereunder; provided, however, that the
provisions hereof shall inure to the benefit of, and be binding upon, any successor of Company. whether by merger, consolidation, transfer of all or substantially all assets, or otherwise. Company represents to Employee that Company is duly
authorized to execute and deliver this Agreement. 
 15.    Notices. Any notice to be given hereunder
shall be in writing and personally delivered or sent by registered mail, postage prepaid, if to Company addressed to it, attention of the President, 258 Elm Street. New Canaan, Connecticut 06840 with copy to the Remuneration Committee of the Board
of Directors of SIBELCO, and if to Employee, addressed to him at 138 Mimosa Circle, Ridgefield, CT 06877. Either party may, by notice as aforesaid, designate a new address to which notice to it shall thereafter be directed. 

16.    Arbitration. Any controversy or claim arising out of or relating to this Agreement shall be settled
by arbitration in Fairfield County, Connecticut in accordance with the rules then obtaining of the American Arbitration Association, and a judgment upon the award rendered by the Arbitrators may be entered in any court having jurisdiction thereof.
The arbitration tribunal shall have the power to order equitable relief and the power to require such discovery as in its judgment would be appropriate under the circumstances. The award of the arbitrator shall be enforceable in any jurisdiction
where there is personal jurisdiction over any affected party. 
 17.    Survival. Notwithstanding the
expiration of the Employment Term or any termination of this Agreement, Employee’s obligations under Sections 7 and 8 of this Agreement shall continue in full force and effect. 

  
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 18.    Choice of Law: Entire Understanding. This Agreement
shall be governed by, and construed in accordance with, the laws of the State of Connecticut. This Agreement contains the entire understanding of the parties respecting its subject matter and supersedes all prior negotiations, commitments and
agreements concerning its subject matter. 
 19.    Compliance with
Section 409A. This Agreement is intended to comply with Section 409A of Internal Revenue Code of 1986, as amended (“Section 409A”), to the extent applicable. Notwithstanding any
provision herein to the contrary, this Agreement shall be interpreted, operated and administered consistent with this intent. Each separate installment under this Agreement shall be treated as a separate payment for purposes of determining whether
such payment is subject to or exempt from compliance with the requirements of Section 409A. In addition, in the event that Employee is a “specified employee” within the meaning of Section 409A (as determined in accordance with
the methodology established by the Company as in effect on the date of termination of Employee’s employment hereunder), any payment or benefits hereunder that are nonqualified deferred compensation subject to the requirements of
Section 409A shall be provided to Employee no earlier than six (6) months after the date of Employee’s “separation from service” within the meaning of Section 409A. To the extent that any provision of this Agreement
violates Section 409A of the Code, the Company and the Executive agree to negotiate in good faith to revise or strike such provision to preserve the intent hereof to the maximum extent permissible under Section 409A of the Code. 

IN WITNESS WHEREOF, the parties have executed this Agreement as of the day and year appearing below. 

 

			
	 /s/ Campbell J. Jones
	 	2 February 2016
	President & Chief Executive Officer	 	Date
		
	EMPLOYEE	 	
		
	 /s/ Scott Preston
	 	Jan. 27, 2016
	Scott Preston	 	Date

  
 -15-EX-10.19

 Exhibit 10.19 

SETTLEMENT AGREEMENT AND MUTUAL GENERAL RELEASE 

This Settlement Agreement and Mutual General Release (“Agreement”) is entered into by and between Unimin Corporation
(“Company”), and Scott Preston (“Employee”)(each, a “Party,” and collectively, the “Parties”). Employee enters into this Agreement on behalf of the Employee, the Employee’s spouse, heirs, successors,
assigns, executors, and representatives of any kind, if any. 
 Whereas, the Company and Employee are parties to an
Employment Agreement (“Employment Agreement”), attached hereto as Exhibit A, effective as of February, 29, 2016, pursuant to which Employee serves as the Company’s Vice President and Chief Operating Officer, and which will expire by
it terms on March 1, 2019; and 
 Whereas, the Company and Employee have agreed to terminate the Employment Agreement and
Employee’s employment with the Company prior to March 1, 2019 in accordance with Section 11(b) of the Employment Agreement, and under the terms and conditions of this Agreement; and 

Whereas, the Employee and the Company voluntarily enter into this Agreement, which includes a mutual release of claims, and
Employee accepts the benefits and other promises contained in this Agreement in full and final satisfaction of the claims released; and 

Whereas, the Parties enter into this Agreement for the express purpose of fully and finally concluding and resolving all
disputes, concerns or matters that ever existed, now exist or may exist between the Company and the Employee, 
 Now, therefore, the Parties
agree as follows: 
  

	1.	 Termination of Employment Agreement and Employment. The Parties mutually agree that the
Employment Agreement and the Employee’s employment with the Company are terminated effective at 11:59 p.m. EST, December 31, 2017 (“Separation Date”), and that any notices required to be given under the Employment Agreement
either have been given or are hereby waived. Except as otherwise specifically set forth in this Agreement, the Employee shall have no right to compensation, employee benefits or damages of any kind under the Employment Agreement.

  

	2.	 No Admission. Neither the Company’s signing of this Agreement nor any actions taken by the
Company in accordance with the terms of this Agreement constitute an admission by the Company that it has acted improperly or unlawfully with regard to the Employee or that it has violated any federal, state, or local law, regulation or any Company
policy or procedure. Neither the Employee’s signing of this Agreement nor any actions taken by the Employee in accordance with the terms of 

	 	 this Agreement constitute an admission by the Employee that he has acted improperly or unlawfully with regard
to the Company or that he has violated any federal, state, or local law, regulation or any Company policy or procedure. 

  

	3.	 Benefits. As consideration for Employee’s execution of this Agreement, the Company will provide
Employee with the following benefits: 

  

	 	(a)	 The Company will pay the Employee a lump sum amount of nine hundred and twenty thousand dollars ($920,000.00),
less applicable federal, state, and local income taxes, social security and Medicare taxes, and payroll deductions. Such amount shall be paid within thirty (30) days of the Separation Date. 

 

	 	(b)	 The Company will pay on the Employee’s behalf the premiums or equivalent premiums (to the extent set
forth below) for the Employee’s coverage and for the Employee’s family, if applicable, under the Company’s group medical and dental plans if the Employee elects to continue coverage under such plans under the Consolidated Omnibus
Budget Reconciliation Act of 1985 (“COBRA”) for for the eighteen (18) month beginning on January 1, 2018 and ending June 30, 2019. It is understood that during this period, Employee will be provided only with the same Group
Health Coverage offered to other Company salaried employees who are in the North American Executive Management Group during the same period, which may or may not be the same as the Group Health Coverage provided on the day immediately preceding the
Separation Date. It is further understood that any Group Health Coverage provided to eligible dependents other than your spouse, will not be provided beyond the date(s) such dependent(s) attain the age of
twenty-six (26). 

  

	 	(c)	 The Company will transfer to the Employee all rights, title and ownership interest in the Company automobile
now in Employees’s possession: 2016 Chevrolet Tahoe, VIN 1GNSKCKCXGR120607. Employee shall be responsible for any title transfer, registration or other taxes and fees, including any applicable federal, state, and local income taxes, social
security and Medicare taxes, and payroll deductions. 

  

	 	(d)	 The Company will provide the Employee with up to six (6) month of outplacement services through Right
Management, 301 Merritt 7, 2nd Floor, Norwalk CT 06851, at no cost to Employee. You have 6 months from execution of this Agreement to commence this benefit. 

Notwithstanding anything to the contrary in this Agreement, if the Employee 

 executes this Agreement at any time prior to the Separation Date, the Employee shall not be
entitled to receive any of the benefits provided for in this Section 3 unless on or immediately after the Separation Date, Employee re-executes this Agreement in its entirety, including the General
Release provisions of Section 5, provided, however, that such re-execution shall not be required in the event of Employee’s death or a physical or mental incapacity rendering Employee incompetent or
incapable of re-executing the Agreement. 
  

	4.	 Non-Compete. The Employee again agrees, and
hereby restates and reaffirms his non-competition obligationthrough the Non-Competition Period as defined in the Employment Agreement, and Sections 8, 9 and 10 of the
Employment Agreement are hereby fully incorporated into this Agreement as if fully set forth herein, provided, however, that the definition of “Competitor” as set forth in section 8(b)(ii) of the Employment Agreement is hereby amended to
mean or include: (A) any third party whose business or major segment thereof is the mining, production or processing of silica or other industrial minerals or materials for use as a proppant in the hydraulic fracturing process or for any other
extraction or excavation process in the oil, gas or other energy related industry, and who is engaged in direct competition with the Company; or (B) any third party who owns or operates, intends to own or operate, or is preparing to own or
operate a subsidiary, affiliate, or business line or business segment whose business is or is expected to be engaged in the activities described in subsection (A) above, and who is engaged in direct competition with the Company. Employee
understands and agrees that the purpose of this this Section 4 is solely to protect the Company’s legitimate business interests, including, but not limited to the Company’s Confidential Information and trade secrets, customer
relationships and goodwill, and the Company’s competitive advantage within the industry in the operation of the Business, as that term is defined in the Employment Agreement. Employee acknowledges and agrees and this Section 9 is
not intended to impair, nor will it impair, Employee’s ability or right to work or earn a living. 

  

	5.	 Mutual General Releases. (a) The Parties hereby release and forever discharge each other and their
subsidiaries, affiliates, and divisions, and their past, present, and future employees, directors, officers, agents, shareholders, insurers, attorneys, executors, successors, assigns, and other representatives of any kind in their capacities as such
(referred to in this Agreement collectively as “Released Parties”) from any and all claims, charges, demands, liabilities, or causes of action of any kind, known or unknown, asserted or unasserted (“Claims”), that each ever had,
has or may have, from the beginning of time through the date the Parties execute this Agreement, including, but not limited to, any claims, liabilities, or causes of action of any kind arising in connection with the Employee’s employment or
termination of employment with the Company or arising under or relating to the Employment Agreement, except as otherwise provided for in paragraph (b) of this Section 5. 

	 	 Furthermore, subject to paragraph (b) of this Section 5, the Employee also releases and waives any
claim or right to further compensation, benefits, damages, penalties, attorneys’ fees, costs, or expenses of any kind from the Company or any of the other Released Parties. Claims that the Employee is releasing include, but are not limited to:
claims for wrongful discharge; constructive discharge; breach of contract; tortious interference with contract; unlawful terms and conditions of employment; retaliation; defamation; invasion of privacy; claims for unlawful conspiracy;
discrimination, including any discrimination or other claim arising under the Age Discrimination In Employment Act of 1967, as amended, 29 U.S.C. §621 et seq. (“ADEA”); Title VII of the Civil Rights Act of 1964, as amended, 29 U.S.C.
§2000e et seq.; the Federal Rehabilitation Act of 1973, as amended, 29 U.S.C. §701 et seq.; the Americans with Disabilities Act of 1990, as amended, 42 U.S.C. §12101 et seq.; the Family and Medical Leave Act of 1993, 29 U.S.C.
§2601 et seq.; the Fair Labor Standards Act of 1938, as amended, 29 U.S.C. §201 et seq.; the Equal Pay Act of 1963, as amended, 29 U.S.C. §206(d) et seq.; the Employee Retirement Income Security Act of 1974, as amended, 29 U.S.C.
§301 et seq.; the Worker Adjustment and Retraining Notification Act, 29 U.S.C. §2101 et seq.; the Connecticut Human Rights and Opportunities Act, C.G.S. §46a-51 et seq., the Connecticut Family
and Medical Leave Act, C.G.S. §31-51kk et seq., the Connecticut Wage Payment Laws, C.G.S. §31-58 et seq., any other federal, state, or local constitutional
provision, statute, executive order, or regulation or ordinance relating to employment and/or civil rights, and any other claims whether based on contract or tort. 

(b) Notwithstanding the provisions of paragraph (a) of this Section 5 or the other provisions of this Agreement: 

 

	 	(i)	 Nothing in paragraph (a) of this Section 5 or in any other provision of this Agreement shall
release, waive or shall affect any rights the Employee has or may have: (A) under this Agreement; (B) under the Unimin Corporation Savings Plan (C) to COBRA health insurance benefits if and to the extent that COBRA benefits are
applicable; or (E) to any claim to unemployment compensation due under applicable state law. 

  

	 	(ii)	 Nothing in paragraph (a) of this Section 5 or in any other provision of this Agreement shall
release, waive or in any way modify the obligations of the Company to the Employee that are described in Section 8 of this Agreement or in Exhibit B hereto. 

 

	 	(iii)	 Nothing in paragraph (a) of this Section 5 or in any other provision of this Agreement shall
release, waive or in any way modify the rights of the Employee as an insured (whether as a named insured or otherwise) under any past or present liability insurance policy (such as directors and officers (“D&O”) liability insurance and
fiduciary liability insurance of the 

	 	 Company or of any affiliate of the Company). 

 

	 	(iv)	 Nothing in paragraph (a) of this Section 5 or in any other provision of this Agreement shall
release, waive or in any way modify the rights of the Employee to reimbursement of his legitimate past business expenses. 

  

	 	(v)	 Nothing in paragraph (a) of this Section 5 shall release, waive or in any way modify the rights of
the Employee to enforce the provisions of Section 3. 

  

	6.	 The Employee understands that he is knowingly and voluntarily releasing all Claims to the extent sent forth
in paragraph (a) of Section 5, which include claims that Employee may not know about. Employee assumes this risk, and expressly waives any and all such unknown rights. Employee acknowledges that he understands the meaning and significance
of this waiver. Employee further understands that he is not releasing any claims that may arise after signing this Agreement, or any right to enforce the terms of this Agreement. 

 

	7.	 No Other Proceedings. The Employee represents that he has not and will not file or join in any action,
charge, claim, complaint, lawsuit, or proceeding of any kind against any of the Released Parties (other than pursuing a claim for unemployment compensation benefits to which the Employee may be entitled) with respect to any claim that is released in
this Agreement. Should the Employee file or join in any action, claim, complaint, lawsuit, or proceeding of any kind against the Company or any of the other Released Parties, based on any claim that the Employee has released, or should such an
action, claim, complaint, lawsuit, or proceeding be filed on the Employee’s behalf, the Employee agrees to withdraw, dismiss, or cause to be withdrawn or dismissed, with prejudice, any such action, claim, complaint, lawsuit, or proceeding of
any kind that is pending in any federal, state, or local agency or court. For the avoidance of doubt, and notwithstanding anything in this Agreement to the contrary, this Agreement does not affect or limit any claims that, under controlling law, may
not be released by private agreement, including, without limitation:, (a) any claims under Workers’ Compensation laws; or (b) the right to file a charge with the Equal Employment Opportunity Commission or similar state or local agency, or
with the National Labor Relations Board, or to provide information to or assist such agency in any proceeding, provided, however, that the Employee agrees that by signing this Agreement, the Employee relinquishes any right to receive any personal
monetary relief or personal equitable relief with respect to any claim filed by the Employee or on the Employee’s behalf in any such proceeding. Additionally, notwithstanding anything in this Agreement to the contrary, nothing in this Agreement
shall limit or restrict the Employee’s right under the ADEA to challenge the validity of this Agreement in a court of law. 

  

	8.	 Indemnity. Attached hereto as Exhibit B is a copy of Article VIII of the
By-Laws of the Company as now in effect. Said Article VIII, in its current form, has been 

	 	 
part of the By-Laws of the Company for more than 10 years. The Company reaffirms its undertaking to perform, and hereby undertakes to perform, all its
obligations to the Employee contained in said Article VIII whenever such obligations are applicable. 

  

	9.	 Confidential Information; Return of Property. 

 

	 	(a)	 The Employee acknowledges that during the course of the Employee’s employment with the Company, the
Employee was entrusted with certain personnel, legal, business, financial, technical, and other proprietary and/or trade secret information and materials that are the property of the Company and that involve confidential information concerning,
among other things, the Company’s dealings, the Company’s customers, vendors, employees, and agents. The Employee agrees and promises that the Employee will not communicate, disclose or cause to be communicated or disclosed to any third
party, or use for the Employee’s own benefit or for the benefit of any other person or entity, without the prior written consent of the Company, any of the above-mentioned information or material, except as required by law, or where such
information is known to or has been released to the general public through no fault of the Employee. In addition, Employee agrees to continue to be bound and obligated by the terms of the Confidentiality Agreement, executed by Employee on
March 11, 2016, a copy of which is attached hereto as Exhibit C. 

  

	 	(b)	 The Employee covenants that he has returned or will return to the Company no later than December 15, 2017
(the “Property Return Date”), any and all property belonging to the Company in Employee’s possession, custody or control. This includes, but is not limited to, credit card(s), books, equipment, computer hardware and software, and
originals and all copies of any business records or documents of any kind, belonging or related to the Company, together with all notes and summaries relating thereto, regardless of the sources from which such records or documents were obtained, and
whether in physical or electronic form. Additionally, the Employee shall return to the Company by the Property Return Date all keys, fobs, security cards, passwords, and other means of access to the Company’s offices or other facilities or bank
safety deposit boxes held in the Company’s name. Notwithstanding the provisions of this paragraph (b) of this Section 9, the Company will not require that the Employee return to the Company the portable computer that is used by the
Employee, but the Company shall have a full opportunity to remove from that computer all software owned or licensed by the Company and all computer files that the Company believes should not be retained by the Employee; provided only that such
removal take place within ninety days of the Property Return Date at a place, day and time mutually agreeable to the Employee and the Company. The 

	 	 
Company undertakes to use reasonable efforts to assign the phone number for the Company Phone (732-216-7073) to the
Employee so that such number can become the phone number for the Employee’s personal cellular phone. 

  

	10.	 No Entitlement To Employment Agreement Benefits. As and to the extent set forth in paragraph
(a) of Section 5, the Employee acknowledges that by entering into this Agreement, he is knowingly and voluntarily releasing and forever discharging any claim to any benefits or other rights under the Employment Agreement, and that Employee
would not be otherwise entitled to any of the benefits specified in Section 3 of this Agreement. 

  

	11.	 Consultation with Counsel. THE EMPLOYEE ACKNOWLEDGES THAT THE HE HAS BEEN ADVISED, IN
THIS WRITING, TO CONSULT WITH AN ATTORNEY OF THE EMPLOYEE’S CHOICE PRIOR TO SIGNING THIS AGREEMENT AND THAT THE EMPLOYEE HAS SIGNED THIS AGREEMENT KNOWINGLY, VOLUNTARILY, AND FREELY, AND WITH SUCH COUNSEL (IF ANY) AS THE EMPLOYEE DEEMED
APPROPRIATE. The Employee understands, however, that whether or not to consult with an attorney is the Employee’s decision. Except as may be otherwise required pursuant to paragraph (b) of Section 5, or Section 8, the
Employee agrees that the Company shall not be required to pay any of the Employee’s attorneys’ fees in this or any related matter or lawsuit, now or later, and that the amounts payable under Section 3 are in full and complete payment
of all matters between the Employee and the Company, including, without limitation, attorneys’ fees and costs. 

  

	12.	 Right to Revoke Agreement. THE EMPLOYEE ACKNOWLEDGES THAT HE HAS BEEN PROVIDED WITH A PERIOD OF TWENTY-ONE (21) DAYS IN WHICH TO CONSIDER WHETHER TO ENTER INTO THIS AGREEMENT. THE EMPLOYEE FURTHER ACKNOWLEDGES THAT THE EMPLOYEE HAS BEEN ADVISED OF THE EMPLOYEE’S RIGHT TO REVOKE THIS AGREEMENT DURING
THE SEVEN (7) DAY PERIOD FOLLOWING EXECUTION OF THIS AGREEMENT. TO REVOKE, THE EMPLOYEE MUST GIVE THE COMPANY WRITTEN NOTICE OF THE EMPLOYEE’S REVOCATION WITHIN THE SEVEN (7) DAY REVOCATION PERIOD. THE COMPANY SHALL HAVE NO RIGHT AT
ANY TIME TO REVOKE THIS AGREEMENT ONCE IT IS EXECUTED BY THE COMPANY, NOTWITHSTANDING THE FACT THAT, PURSUANT TO THIS SECTION 12, THIS AGREEMENT DOES NOT BECOME EFFECTIVE UNTIL THE EIGHTH DAY AFTER THE EMPLOYEE SIGNS IT AND RETURNS IT TO THE
COMPANY. 

	13.	 Effective Date of Agreement. This Agreement becomes effective on the date the Employee signs the
Agreement and returns it to the Company to the Company representative noted in Section 17 below, provided the Employee has not revoked this Agreement pursuant to Section 12. 

 

	14.	 No Reliance. The parties acknowledge that they execute this Agreement in reliance on their own personal
knowledge, and are not relying on any representation or promise made by any other party that is not contained in this Agreement. 

  

	15.	 Successors and Assigns. This Agreement inures to the benefit of the Employee, his heirs, successors and
assigns. This Agreement inures to the benefit of the Company and its successors and assigns and shall be binding upon the successors and assigns of the Company. 

 

	16.	 Entire Agreement. This Agreement contains the entire agreement between the parties concerning the
subject matter of this Agreement and supersedes all prior negotiations, agreements, or understandings between the parties except that any obligations of the Employee to the Company, under any agreement, policy, or other document in force on the
Separation Date, that by their terms apply after the termination of his employment, including Employee’s obligations under the Employment Agreement, shall survive the execution of this Agreement and continue in full force and effect. No
promises or oral or written statements have been made to the Employee other than those in this Agreement. If any portion of this Agreement is found to be unenforceable, all other portions that can be separated from it, or appropriately limited in
scope, shall remain fully valid and enforceable. No provision of this Agreement may be modified, waived, or discharged unless the same is agreed to in writing by both parties hereto. The failure of a party to insist upon strict adherence to any
term, condition or other provision of this Agreement shall not be considered a waiver or deprive that party of the right thereafter to insist upon strict adherence to that term or any other term, condition or other provision of this Agreement.

  

	17.	 Notice. Any notice to be given under this Agreement shall be in writing and delivered personally, sent
by a nationally recognized courier service or sent by registered or certified mail, postage prepaid, return receipt requested, addressed to the party concerned at the address indicated below or to such other address as such party may subsequently
give written notice of under this Agreement: 

 If to Employee, to: 

Scott Preston 
 138 Mimosa Circle

 Ridgefield, Connecticut 06877 

 If to the Company, to: 

Vice President Human Resources 

Unimin Corporation 
 258 Elm
Street 
 New Canaan, Connecticut 06840 
  

	18.	 Governing Law. This Agreement shall be governed by the substantive laws of the State of Connecticut
without regard to conflicts of law principles. 

  

	19.	 Jurisdiction and Venue. Any dispute, claim or controversy arising out of or relating to this Agreement
or the breach, termination, enforcement, interpretation or validity thereof, including the determination of the scope or applicability of this agreement to arbitrate, shall be determined by arbitration in Connecticut, before one independent
arbitrator selected pursuant to the JAMS Streamlined Arbitration Rules and Procedures. The arbitration shall be administered by JAMS pursuant to its Streamlined Arbitration Rules and Procedures. This clause shall not preclude parties from seeking
provisional remedies in aid of arbitration from a court of appropriate jurisdiction. Any judgment obtained in arbitration related to or arising from this Agreement may be enforced, as provided for by law, in the any Connecticut Superior Court for
the Judicial District of Stamford- Norwalk, Connecticut, without re-examination of matters previously adjudicated, and the Employee and Company hereby irrevocably submit to the jurisdiction and venue of such
court in respect of any such action or proceeding. 

  

	20.	 Inducement. To induce the Company to provide the Employee the consideration recited in this
Agreement, the Employee voluntarily executes this Agreement, acknowledges that the only consideration for executing this Agreement is that recited in this Agreement, and that no other promise, inducement, threat, agreement, or understanding of any
kind has been made by anyone to cause the Employee to execute this Agreement. 

 THE EMPLOYEE UNDERSTANDS THAT THIS
AGREEMENT CONTAINS A FINAL RELEASE OF ALL KNOWN AND UNKNOWN CLAIMS AS AND TO THE EXTENT SET FORTH IN PARAGRAPH (a) OF SECTION 5, AND THAT THE EMPLOYEE CAN MAKE NO FURTHER CLAIM OF ANY KIND AGAINST THE COMPANY OR ANY OF THE OTHER RELEASED
PARTIES ARISING OUT OF ACTIONS OCCURRING THROUGH THE DATE THE EMPLOYEE EXECUTES THIS AGREEMENT. 

 THE EMPLOYEE AGREES THAT THE EMPLOYEE READ AND UNDERSTANDS THIS AGREEMENT, AND IS ENTERING
INTO THIS AGREEMENT KNOWINGLY AND VOLUNTARILY AND WITHOUT ANY COERCION. 
  

							
	Employee	 		 		 	Unimin Corporation
				
	/s/ Scott Preston                                	 		 	By:	 	/s/ Jennifer Fox                    
	Scott Preston	 		 	`	 	Jennifer Fox
		 		 		 	Vice President, Human Resources

 County of Fairfield      ) 

                          
           )ss: New Canaan 
 State of Connecticut    ) 

I, Scott Preston, under penalty of perjury, hereby declare that I have knowingly and voluntarily executed this Agreement by affixing my signature above. 

Sworn before me this 20 day of December, 2017. 
  

			
	
                /s/ Stephen M.
Albano          

		 	 Notary Public

		 	 My Commission Expires:

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