Document:

Supplemental Indenture

 Exhibit 4.1 

SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of June 4, 2010 among NL COOP Holdings LLC (the
“Additional Subsidiary Guarantor”), a Delaware limited liability company and a direct subsidiary of Hexion Specialty Chemicals, Inc. (or its permitted successor) (“Holdings”), Hexion U.S. Finance Corp., a Delaware corporation and
Hexion Nova Scotia Finance, ULC, a Nova Scotia unlimited liability company (the “Issuers”), and Wilmington Trust FSB, as Trustee under the Indenture (the “Trustee”). 

W I T N E S S E T H : 

WHEREAS the Issuers, Holdings and the Subsidiary Guarantors have heretofore executed and delivered to the Trustee a Supplemental
Indenture, dated as of January 29, 2010 (the “Supplemental Indenture”), to the Indenture (collectively with Supplemental Indenture, the “Indenture”), dated as of January 29, 2010, providing for the assumption and
guarantee of the obligations with respect to the Notes issued under the Indenture (the “Notes”); 
 WHEREAS,
Section 4.11 and Section 10.06 of the Indenture provide that under certain circumstances Holdings will cause the Additional Subsidiary Guarantor to execute and deliver to the Trustee a guaranty agreement pursuant to which the Additional
Subsidiary Guarantor will Guarantee payment of the Notes on the same terms and conditions as those set forth in Article 10 of the Indenture; and 

WHEREAS, pursuant to Section 9.01(iv) of the Indenture, the Trustee and the Issuers are authorized to execute and deliver this
Supplemental Indenture. 
 NOW THEREFORE, in consideration of the foregoing and for good and valuable consideration, the receipt
of which is hereby acknowledged, the Issuers, the Additional Subsidiary Guarantor and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 

SECTION 1. Capitalized Terms. Capitalized terms used herein but not defined shall have the meanings assigned to them in the
Indenture. 
 SECTION 2. Guarantees. The Additional Subsidiary Guarantor hereby agrees, jointly and severally with all
other Guarantors, to guarantee the Issuers’ obligations under the Notes on the terms and subject to the conditions set forth in Article 10 of the Indenture and to be bound by all other applicable provisions of the Indenture (including Article
11). 
 SECTION 3. Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as expressly amended
hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every
holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby. 
 SECTION 4. Governing Law.
THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 

 SECTION 5. Trustee Makes No Representation. The Trustee makes no representation as to
the validity or sufficiency of this Supplemental Indenture. 
 SECTION 6. Counterparts. The parties may sign any number
of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. 

SECTION 7. Effect of Headings. The Section headings herein are for convenience only and shall not effect the construction of this
Supplemental Indenture. 
 * * * * * 

 IN WITNESS WHEREOF, the parties have caused this Supplemental Indenture to be duly executed
as of the date first written above. 
  

					
	HEXION U.S. FINANCE CORP.,
			
		 	by	 	
		 		 	 /s/ Authorized Signatory

		 		 	 Name:

Title:

	
	 HEXION NOVA SCOTIA FINANCE, ULC,

			
		 	by	 	
		 		 	 /s/ Authorized Signatory

		 		 	 Name:

Title:

	
	 HEXION SPECIALTY CHEMICALS, INC.,

			
		 	by	 	
		 		 	 /s/ Authorized Signatory

		 		 	 Name:

Title:

	
	NL COOP HOLDINGS LLC,
			
		 	by:	 	Hexion Specialty Chemicals, Inc., its Sole Member
			
		 		 	 /s/ Authorized Signatory

		 		 	Name:
		 		 	Title:

 IN WITNESS WHEREOF, the parties have caused this Supplemental Indenture to be duly executed
as of the date first written above. 
  

					
	WILMINGTON TRUST FSB, as Trustee,
			
		 	by	 	
		 		 	 /s/ Authorized Signatory

		 		 	 Name:

Title:Supplemental Indenture

 Exhibit 4.2 

SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of June 4, 2010 among NL COOP Holdings LLC (the
“Additional Subsidiary Guarantor”), a Delaware limited liability company and a direct subsidiary of Hexion Specialty Chemicals, Inc. (or its permitted successor) (“Holdings”), Hexion U.S. Finance Corp., a Delaware corporation and
Hexion Nova Scotia Finance, ULC, a Nova Scotia unlimited liability company (the “Issuers”), and Wilmington Trust Company, as Trustee under the Indenture (the “Trustee”). 

W I T N E S S E T H : 

WHEREAS the Issuers, Holdings and the Subsidiary Guarantors have heretofore executed and delivered to the Trustee an Indenture (the
“Indenture”), dated as of November 3, 2006, providing for the issuance of Floating Rate Notes and Fixed Rate Notes (the “Notes”); 

WHEREAS, Section 4.11 and Section 10.06 of the Indenture provide that under certain circumstances Holdings will cause the
Additional Subsidiary Guarantor to execute and deliver to the Trustee a guaranty agreement pursuant to which the Additional Subsidiary Guarantor will Guarantee payment of the Notes on the same terms and conditions as those set forth in Article 10 of
the Indenture; and 
 WHEREAS, pursuant to Section 9.01(iv) of the Indenture, the Trustee and the Issuers are authorized to
execute and deliver this Supplemental Indenture. 
 NOW THEREFORE, in consideration of the foregoing and for good and valuable
consideration, the receipt of which is hereby acknowledged, the Issuers, the Additional Subsidiary Guarantor and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 

SECTION 1. Capitalized Terms. Capitalized terms used herein but not defined shall have the meanings assigned to them in the
Indenture. 
 SECTION 2. Guarantees. The Additional Subsidiary Guarantor hereby agrees, jointly and severally with all
other Guarantors, to guarantee the Issuers’ obligations under the Notes on the terms and subject to the conditions set forth in Article 10 of the Indenture and to be bound by all other applicable provisions of the Indenture (including Article
11). 
 SECTION 3. Ratification of Indenture; Supplemental Indentures Part of Indenture. Except as expressly amended
hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every
holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby. 
 SECTION 4. Governing
Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 

 SECTION 5. Trustee Makes No Representation. The Trustee makes no representation as to
the validity or sufficiency of this Supplemental Indenture. 
 SECTION 6. Counterparts. The parties may sign any number
of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. 

SECTION 7. Effect of Headings. The Section headings herein are for convenience only and shall not effect the construction of this
Supplemental Indenture. 
 * * * * * 

 IN WITNESS WHEREOF, the parties have caused this Supplemental Indenture to be duly executed
as of the date first written above. 
  

					
	HEXION U.S. FINANCE CORP.,
			
		 	by	 	
		 		 	 /s/ Authorized Signatory

		 		 	 Name:

Title:

	
	HEXION NOVA SCOTIA FINANCE, ULC,
			
		 	by	 	
		 		 	 /s/ Authorized Signatory

		 		 	 Name:

Title:

	
	HEXION SPECIALTY CHEMICALS, INC.,
			
		 	by	 	
		 		 	 /s/ Authorized Signatory

		 		 	 Name:

Title:

	
	NL COOP HOLDINGS LLC,
			
		 	by:	 	Hexion Specialty Chemicals, Inc., its
		 		 	Sole Member
			
		 		 	 /s/ Authorized Signatory

		 		 	 Name:

Title:

 IN WITNESS WHEREOF, the parties have caused this Supplemental Indenture to be duly executed
as of the date first written above. 
  

					
	WILMINGTON TRUST COMPANY, as Trustee,
			
		 	by	 	
		 		 	 /s/ Authorized Signatory

		 		 	Name:
		 		 	Title:Supplement to the U.S. Guarantee Agreement

 Exhibit 10.1 

SUPPLEMENT dated as of June 4, 2010 (this “Supplement”), to the U.S. Guarantee Agreement dated as of May 31,
2005 (the “Guaranty”), among HEXION LLC, a Delaware limited liability company, HEXION SPECIALTY CHEMICALS, INC., a New Jersey corporation, each Domestic Subsidiary Loan Party party thereto and JPMORGAN CHASE BANK, N.A., as
Administrative Agent (in such capacity, the “Administrative Agent”) for the Lenders (as defined therein). 
 A.
Reference is made to the Third Amended and Restated Credit Agreement dated as of January 29, 2010 (as amended, supplemented, waived or otherwise modified from time to time, the “Credit Agreement”), among Hexion LLC, Hexion
Specialty Chemicals, Inc. (the “U.S. Borrower”), Hexion Specialty Chemicals Canada, Inc. (f/k/a Borden Chemical Canada, Inc.) (the “Canadian Borrower”), Hexion Specialty Chemicals B.V. (f/k/a Resolution Europe B.V.)
(the “Dutch Borrower”), Hexion Specialty Chemicals UK, Ltd. (f/k/a Borden Chemical GB Limited) and Borden Chemical UK Limited (together “the UK Borrowers” and, collectively with the U.S. Borrower, Canadian Borrower
and Dutch Borrower, the “Borrowers”, and each a “Borrower”) the Lenders party thereto from time to time, JPMorgan Chase Bank, N.A., as administrative agent (in such capacity, the “Administrative
Agent”) for the Lenders, Citicorp North America, Inc., as syndication agent, Credit Suisse, as documentation agent, and J.P. Morgan Securities Inc., Citigroup Global Markets Inc. and Credit Suisse, as joint lead arrangers and joint
bookrunners. 
 B. Capitalized terms used herein and not otherwise defined herein shall have the meanings assigned to such terms
in the Credit Agreement and the Guaranty. 
 C. The Guarantors have entered into the Guaranty in order to induce the Lenders to
make Loans and accept and purchase B/As and each Issuing Bank to issue Letters of Credit. Section 12 of the Guaranty provides that additional Subsidiaries may become Guarantors under the Guaranty by execution and delivery of an instrument in
the form of this Supplement. The undersigned Subsidiary (the “New Subsidiary”) is executing this Supplement in accordance with the requirements of the Credit Agreement to become a Guarantor under the Guaranty in order to induce the
Lenders to make additional Loans and accept and purchase additional B/As and each Issuing Bank to issue additional Letters of Credit and as consideration for Loans previously made, B/As previously accepted and Letters of Credit previously issued.

 Accordingly, the Administrative Agent and the New Subsidiary agree as follows: 

SECTION 1. In accordance with Section 12 of the Guaranty, the New Subsidiary by its signature below becomes a Guarantor under
the Guaranty with the same force and effect as if originally named therein as a Guarantor and the New Subsidiary hereby agrees to all the terms and provisions of the Guaranty applicable to it as a Guarantor thereunder. In furtherance of the
foregoing, the New Subsidiary does hereby guarantee to the Administrative Agent the due and punctual payment of the Guaranteed Obligations as set forth in the Guaranty. Each reference to a “Guarantor” in the Guaranty shall be deemed to
include the New Subsidiary. The Guaranty is hereby incorporated herein by reference. 
 SECTION 2. The New Subsidiary
represents and warrants to the Administrative Agent and the other Secured Parties that this Supplement has been duly authorized, executed and 

 
delivered by it and constitutes its legal, valid and binding obligation, enforceable against it in accordance with its terms, subject to (i) the effects of bankruptcy, insolvency,
moratorium, reorganization, fraudulent conveyance or other similar laws affecting creditors’ rights generally, (ii) general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law)
and (iii) implied covenants of good faith and fair dealing. 
 SECTION 3. This Supplement may be executed in two or
more counterparts, each of which shall constitute an original but all of which when taken together shall constitute but one contract. This Supplement shall become effective when (a) the Administrative Agent shall have received a counterpart of
this Supplement that bears the signature of the New Subsidiary and (b) the Administrative Agent has executed a counterpart hereof. Delivery of an executed signature page to this Supplement by facsimile transmission shall be as effective as
delivery of a manually signed counterpart of this Supplement. 
 SECTION 4. Except as expressly supplemented hereby, the
Guaranty shall remain in full force and effect. 
 SECTION 5. THIS SUPPLEMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES
UNDER THIS SUPPLEMENT SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAWS OF THE STATE OF NEW YORK. 
 SECTION 6.
In the event any one or more of the provisions contained in this Supplement should be held invalid, illegal or unenforceable in any respect, the validity, legality and enforceability of the remaining provisions contained herein and in the Guaranty
shall not in any way be affected or impaired thereby. The parties shall endeavor in good-faith negotiations to replace the invalid, illegal or unenforceable provisions with valid provisions the economic effect of which comes as close as possible to
that of the invalid, illegal or unenforceable provisions. 
 SECTION 7. All communications and notices hereunder shall be in
writing and given as provided in Section 5(d) of the Guaranty. 
 SECTION 8. The New Subsidiary agrees to reimburse the
Administrative Agent for its reasonable out-of-pocket expenses in connection with this Supplement, including the reasonable fees, disbursements and other charges of counsel for the Administrative Agent. 

* * * * * 

 IN WITNESS WHEREOF, the New Subsidiary and the Administrative Agent have duly executed this
Supplement to the Guaranty as of the day and year first above written. 
  

			
	NL COOP HOLDINGS LLC
		
	By:	 	 Hexion Specialty Chemicals, Inc., its Sole

Member

		
	By:	 	 /s/ Authorized Signatory

		 	 Name:

Title:

	
	 Legal Name: NL COOP Holdings LLC

	
	 Jurisdiction of Formation: Delaware

 IN WITNESS WHEREOF, the New Subsidiary and the Administrative Agent have duly executed this
Supplement to the Guaranty as of the day and year first above written. 
  

			
	JPMORGAN CHASE BANK, N.A., as Administrative Agent,
		
	By:	 	 /s/ Authorized Signatory

		 	 Name:

Title:

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