SECURED PROMISSORY NOTE

$2,506,248.00 Dallas, Texas February 15, 2017

FOR VALUE RECEIVED, the undersigned, ZEC, Inc., a Delaware corporation
(“Maker”), promises to pay to the order of Karl M. Taft III and Michelle L. Taft
(collectively, “Holder”), the principal sum of TWO MILLION FIVE HUNDRED AND SIX
THOUSAND TWO HUNDRED FORTY EIGHT DOLLARS ($2,506,248.00), at the address
designated in Section 9, or at such other place as Holder may from time to time
designate in writing.

1.

Payments. The principal of this Note shall be due and payable in accordance with
the schedule set forth on Appendix A, in the column entitled “Distributions to
Selling Shareholders”.  The entire outstanding principal balance of this Note
shall be due and payable no later than twelve (12) months following the date of
this Note (plus the cure period set forth in this Note).  All payments hereunder
shall be payable in lawful money of the United States of America which shall be
legal tender for public and private debts at the time of payments.

2.

Prepayments. Maker shall have the right to prepay the principal under this Note
in full or in part at any time and from time to time.  

3.

Default Remedies.  Maker shall be in default under this Note upon the happening
of any condition or event set forth below (each, an “Event of Default”):

(a)

Maker shall fail to make any payment to Holder when due under this Note and such
default shall continue unremedied for a period of ninety (90) days;

(b)

Maker shall be in default under that certain Security Agreement (herein so
called) executed by Maker for the benefit of Holder;

(c)

Maker shall be in default under that certain Stock Pledge Agreement (herein so
called) executed by Maker for the benefit of Holder; or

(d)

The commencement of any proceeding under any bankruptcy or insolvency laws by or
against Maker which results in the entry of an order for relief which remains
undismissed, undischarged or unbonded for a period of 60 days or more.

4.

Cumulative Rights.  No delay on the part of the Holder of this Note in the
exercise of any power or right under this Note or under any other instrument
executed pursuant hereto shall operate as a waiver thereof, nor shall a single
or partial exercise of any power or right preclude other or further exercise
thereof or the exercise of any other power or right.

5.

Waiver.  Maker waives demand, presentment, protest, notice of dishonor, notice
of nonpayment, notice of intention to accelerate or notice of acceleration
(other than notice of default pursuant to Section 3(a)), notice of protest and
any and all lack of diligence or delay in collection or the filing of suit
hereon which may occur, and agrees to all extensions and partial payments,
without prejudice to the Holder hereof.

6.

Attorneys’ Fees and Costs.  In the event that this Note is collected in whole or
in part through suit, arbitration, mediation, or other legal proceeding of any
nature, then and in any such case there shall be added to the unpaid principal
amount hereof all reasonable costs and expenses of collection, including,
without limitation, reasonable attorney’s fees.

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7.

Governing Law.  THIS NOTE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH
THE INTERNAL LAWS OF THE STATE OF TEXAS, WITHOUT GIVING EFFECT TO CONFLICTS OF
LAW PROVISION OR RULE (WHETHER OF THE STATE OF TEXAS OR ANY OTHER JURISDICTION)
THAT WOULD RESULT IN THE APPLICATION OF THE LAWS OF ANY JURISDICTION OTHER THAN
THE STATE OF TEXAS.

8.

Usury.  All agreements between Maker and the Holder of this Note, whether now
existing or hereafter arising and whether written or oral, are expressly limited
so that in no contingency or event whatsoever, whether by acceleration of the
maturity of this Note or otherwise, shall the amount paid, or agreed to be paid,
to the Holder hereof for the use, forbearance or detention of the money to be
loaned hereunder or otherwise, exceed the maximum amount permissible under
applicable law.  

9.

Notices.  All notices of communication required or permitted hereunder shall be
in writing and may be given by (a) depositing the same in United States mail,
addressed to the party to be notified, postage prepaid and registered or
certified with return receipt request, or (b) delivering the same in person or
by overnight express to an officer or agent of such party:

(i)

If to Maker, addressed thereto at:

1002 North Central Expressway, Suite #495

Richardson, TX 75080

Attention:  E. Thomas Layton; and

(ii)

If to Holder, addressed thereto at:

1002 North Central Expressway, Suite #499

Richardson, TX  75080

Attention:  Karl Taft

10.

 Security.  This Note is secured by a Security Agreement (herein so called)
executed by Maker for the benefit of Holder, and is further secured by a Stock
Pledge Agreement (herein so called) executed by Maker for the benefit of Holder.

THIS NOTE REPRESENTS THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY NOT BE
CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR SUBSEQUENT ORAL AGREEMENTS
OF THE PARTIES.  THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

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IN WITNESS WHEREOF, the undersigned have executed this Note on and as of the
date first above written.

MAKER:

ZEC, INC.

By: __________________________

Name: E. Thomas Layton

Title: Chairman and CEO

AGREED AND ACKNOWLEDGED AS TO FORM

HOLDER:

__________________________

       Karl M. Taft III

__________________________

       Michelle L. Taft

 

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Appendix A

Capital Allocation and Payment Schedule

Net Capital Raise by Maker

Distributions to Holders 1

Repayment of outstanding advances from Holders to KT Chemicals, Inc.

Contributions to KT Chemicals, Inc.’s  Working Capital

Contributions to Maker’s Working Capital

First  $1,500,000

$956,248

$193,752

$100,000

$250,000

Next  $500,000

$  300,000

 

$50,000

$150,000

Next  $500,000

$  300,000

 

$50,000

$150,000

Next  $500,000

$  300,000

 

$50,000

$150,000

Next  $500,000

$  300,000

 

$50,000

$150,000

Next  $500,000

$  350,000

 

 

$150,000

Next  $500,000

 

 

$200,000

$300,000

$4,500,000

$2,506,248

$193,752

$500,000

$1,300,000

1  The full amount is due no later than twelve (12) months following the date of
this Note; Maker’s failure to remit such sums when due (or within the cure
period set forth in this Note) shall trigger Holder’s right to rescission as set
forth in Section 4.4 of that certain Stock Purchase Agreement dated the date
hereof, by and among Holder and Maker.

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