EX-4.3





 Exhibit 4.3 

SECOND SUPPLEMENTAL INDENTURE 

Second Supplemental Indenture (this “Supplemental Indenture”), dated as of April 25, 2019 between P.D.R Solutions (U.S.)
LLC, a Delaware limited liability company (the “Guaranteeing Subsidiary”), a subsidiary of EIG Investors Corp., a Delaware Corporation (the “Issuer”), and Wilmington Trust, National Association, as trustee (the
“Trustee”). 
 W I T N E S S E T H 

WHEREAS, each of EIG Investors Corp. and the Guarantors (as defined in the Indenture referred to below) has heretofore executed and delivered
to the Trustee an indenture (the “Indenture”), dated as of February 9, 2016, or a supplemental indenture thereto, providing for the issuance of an unlimited aggregate principal amount of 10.875% Senior Notes due 2024 (the
“Notes”); 
 WHEREAS, the Indenture provides that under certain circumstances the Guaranteeing Subsidiary shall execute and
deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuer’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein and
under the Indenture (the “Guarantee”); and 
 WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is
authorized to execute and deliver this Supplemental Indenture without the consent of Holders. 
 NOW THEREFORE, in consideration of the
foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows: 

(1)    Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them
in the Indenture. 
 (2)    Agreement to Guarantee. The Guaranteeing Subsidiary hereby agrees to be a Guarantor
under the Indenture and to be bound by the terms of the Indenture applicable to a Guarantor, including Article 10 thereof. 

(3)    Execution and Delivery. The Guaranteeing Subsidiary agrees that the Guarantee shall remain in full force and
effect notwithstanding the absence of the endorsement of any notation of such Guarantee on the Notes. 

(4)    Governing Law. THIS SUPPLEMENTAL INDENTURE WILL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF
THE STATE OF NEW YORK. 
 (5)    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 one and the same agreement. The exchange of copies of this Supplemental Indenture and of signature pages by facsimile, PDF or other electronic transmission shall
constitute effective execution and delivery of this Supplemental Indenture as to the parties hereto and may be used in lieu of the original Supplemental Indenture and signature pages for all purposes. 












 (6)    Effect of Headings. The Section headings herein are for
convenience only and shall not affect the construction hereof. 
 (7)    The Trustee. The Trustee shall not be
responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary. 

(8)    Benefits Acknowledged. The Guaranteeing Subsidiary acknowledges that it will receive direct and indirect
benefits from the financing arrangements contemplated by the Indenture and this Supplemental Indenture and that the guarantee and waivers made by it pursuant to this Guarantee are knowingly made in contemplation of such benefits. 

[Signatures Pages Follow] 












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

			
	P.D.R SOLUTIONS (U.S.) LLC
		
	By:	 	 /s/ Marc Montagner





			
	Name:	 	Marc Montagner


 
			
	Title:	 	Chief Financial Officer


 [Signature Page to Supplemental Indenture] 












 
			
	WILMINGTON TRUST, NATIONAL ASSOCIATION, as Trustee
		
	By:	 	 /s/ Nedine P. Sutton

		 	Name: Nedine P. Sutton
		 	Title: Vice President


 [Signature Page to Supplemental Indenture]