JOINDER AGREEMENT

JOINDER AGREEMENT

THIS JOINDER AGREEMENT, dated as of June 7, 2006 (this “Agreement”), by and among AMEGY BANK NATIONAL ASSOCIATION (the “Lender”), KRATON POLYMERS LLC, a Delaware limited liability corporation, as the borrower (“Company”), each of the Guarantors listed on the signature pages hereto (the “Guarantors”), and UBS AG, STAMFORD BRANCH, as Administrative Agent.

RECITALS:

WHEREAS, reference is hereby made to the CREDIT AND GUARANTY AGREEMENT, dated as of December 23, 2003 (as amended pursuant to that certain Amendment No. 1 to Credit and Guaranty Agreement dated as of March 4, 2004, that certain Amendment No. 2 to Credit and Guaranty Agreement dated as of October 21, 2004, that certain Amendment No. 3 to Credit and Guaranty Agreement dated as of February 16, 2006, and that certain Amendment No. 4 to Credit and Guaranty Agreement dated as of May 12, 2006, and as further amended, restated supplemented or otherwise modified from time to time, the “Credit Agreement’’; the terms defined therein and not otherwise defined herein being used herein as therein defined), by and among the Company, the Guarantors, the Lenders party thereto from time to time, Goldman Sachs Credit Partners L.P. and UBS Securities LLC, as Lead Arrangers, and UBS AG, Stamford Branch, as Administrative Agent and Collateral Agent;

WHEREAS, reference is hereby made to Amendment No. 4 to Credit and Guaranty Agreement dated as of May 12, 2006 (“Amendment No. 4”) among the Company, the Guarantors, the Lenders party thereto and the Administrative Agent.

WHEREAS, subject to the terms and conditions of Amendment No. 4, Company may increase the existing Revolving Commitments by an amount up to $20,000,000 by entering into one or more Joinder Agreements with Eligible Assignees.

NOW, THEREFORE, in consideration of the premises and agreements, provisions and covenants herein contained, the parties hereto agree as follows:

The Lender hereby agrees to commit to provide its respective Commitment as set forth on Schedule A annexed hereto, on the terms and subject to the conditions set forth below:

The Lender (i) confirms that it has received a copy of the Credit Agreement and the other Credit Documents, together with copies of the financial statements referred to therein and such other documents and information as it has deemed appropriate to make its own credit analysis and decision to enter into this Joinder Agreement (this “Agreement”); (ii) agrees that it will, independently and without reliance upon the Administrative Agent or any other Lender or Agent and based on such documents and information as it shall deem appropriate at the time, continue to make its own credit decisions in taking or not taking action under the Credit Agreement; (iii) appoints and authorizes Administrative Agent and Syndication Agent to take such action as agent on its behalf and to exercise such powers under the Credit Agreement and the other Credit Documents as are delegated to Administrative Agent and Syndication Agent, as the case may be, by the terms thereof, together with such powers as are reasonably incidental thereto; and (iv) agrees that it will perform in accordance with their terms all of the obligations which by the terms of the Credit Agreement are required to be performed by it as a Lender.

Each Lender hereby agrees to make its Commitment on the following terms and conditions:

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IN WITNESS WHEREOF, each of the undersigned has caused its duly authorized officer to execute and deliver this Joinder Agreement as of the date first referenced above.

AMEGY BANK NATIONAL ASSOCIATION

By: /s/ Laif Afseth
Name: Laif Afseth
Title: Senior Vice President


Notice Address:
1801 Main Street
TH-A007-5765
Houston, Texas 77002

Attention: Maxine Hunter, Faye Cain
Telephone: 713 ###-###-####, 713 ###-###-####
Facsimile: 713 ###-###-####

KRATON POLYMERS LLC

By: /s/ Raymond K. Guba
Name: Raymond K. Guba
Title: Vice President and Chief Financial Officer




GUARANTORS:

POLYMER HOLDINGS LLC

ELASTOMERS HOLDINGS LLC
KRATON POLYMERS U.S. LLC
KRATON POLYMERS CAPITAL CORPORATION

By: /s/ Raymond K. Guba
Name: Raymond K. Guba
Title: Vice President and Chief Financial Officer







Consented to by:

UBS AG, STAMFORD BRANCH
as Administrative Agent

By: /s/ Richard L. Tavrow
Name: Richard L. Tavrow
Title: Director Banking Product Services, US

By: /s/ Vladimira Holeckova
Name: Vladimira Holeckova
Title: Associate Director Banking Product Services, US

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SCHEDULE A
TO JOINDER AGREEMENT

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