Exhibit 4.3 SECOND SUPPLEMENTAL INDENTURE dated as of August 22, 2002 among Tekni-Plex, Inc. TP/Elm Acquisition Subsidiary, Inc. and HSBC Bank USA as Trustee ___________________________ 12 3/4% Senior Subordinated Notes due June 15, 2010 THIS SUPPLEMENTAL INDENTURE (this "SUPPLEMENTAL INDENTURE"), entered into as of August 22, 2002, among Tekni-Plex, Inc., a Delaware corporation (the "COMPANY"), TP/Elm Acquisition Subsidiary, Inc. ("TP/ELM"), and HSBC Bank USA, as trustee (the "TRUSTEE"). RECITALS WHEREAS, the Company, the Guarantors party thereto and the Trustee entered into the Indenture, dated as of June 21, 2000 (the "INDENTURE"), relating to the Company's 12 3/4% Senior Subordinated Notes due June 15, 2010 (the "NOTES"); WHEREAS, as a condition to the Trustee entering into the Indenture and the purchase of the Notes by the Holders, the Company agreed pursuant to the Indenture to cause any newly acquired or created Domestic Restricted Subsidiaries to provide Guaranties. AGREEMENT NOW, THEREFORE, in consideration of the premises and mutual covenants herein contained and intending to be legally bound, the parties to this Supplemental Indenture hereby agree as follows: SECTION 1. Capitalized terms used herein and not otherwise defined herein are used as defined in the Indenture. SECTION 2. TP/Elm, by its execution of this Supplemental Indenture, agrees to be a Guarantor under the Indenture and to be bound by the terms of the Indenture applicable to Guarantors, including, but not limited to, Article 11 and Article 12 thereof. SECTION 3. This Supplemental Indenture shall be governed by and construed in accordance with the laws of the State of New York. SECTION 4. This Supplemental Indenture may be signed in various counterparts which together will constitute one and the same instrument. SECTION 5. This Supplemental Indenture is an amendment supplemental to the Indenture and the Indenture and this Supplemental Indenture will henceforth be read together. 2 SECTION 6. The Trustee makes no representation and shall have no responsibility as to the validity of this Supplemental Indenture or the proper authorization or the due execution hereof by the Company or TP/Elm. IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed as of the date first above written. 3 TEKNI-PLEX, INC., as Issuer By: /s/ F. Patrick Smith ________________________________ Name: F. Patrick Smith Title: Chief Executive Officer TP/ELM ACQUISITION SUBSIDIARY, INC. By: /s/ F. Patrick Smith _________________________________ Name: F. Patrick Smith Title: Chief Executive Officer HSBC BANK USA, as Trustee By: /s/ Frank J. Godino _________________________________ Name: Frank J. Godino Title: Vice President 4