UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

~~WASHINGTON~~Washington, D.C. DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of ~~the Securities Exchange Act of 1934~~

~~Date~~the Securities ofExchange ~~report~~Act ~~(Date~~ of ~~earliest event reported): December 16, 2004~~ 1934

~~Gundle/SLT~~Date of Report: ~~Environmental~~(Date of earliest event reported): January 3, ~~Inc.~~2006 (December 30, 2005)

GUNDLE/SLT ENVIRONMENTAL, INC.

(Exact name of registrant as specified in its charter)

Delaware		333-118278	22-2731074
Delaware (State of Incorporation)	333-118278 (Commission File Number)	22-2731074 (IRS Employer Identification No.)
(State or other jurisdiction of incorporation)		(Commission File Number)	(IRS Employer Identification No.)
19103 Gundle Road Houston, Texas 77073 (Address of Registrant’s principal executive offices) (281) 443-8564 (Registrant’s telephone number, including area code) Not Applicable (Former name or former address, if changed since last report)

~~19103~~Check the appropriate ~~Gundle~~box ~~Road,~~below if the Form 8-K filing is intended to simultaneously ~~Houston,~~ satisfy ~~Texas~~the ~~77073~~filing obligations of the registrant under any of the following provisions (see General Instruction A.2. below):

o Written communications pursuant to Rule 425 under the Securities Act (~~Address~~17 ofCFR ~~Principal~~230.425) ~~Executive~~o ~~Offices,~~Soliciting ~~including~~material ~~Zip~~pursuant ~~Code~~to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

~~(281)~~Section 1 ~~443~~-~~8564~~ Registrant’s Business and Operations

~~(Registrant’s~~Item 1.01 ~~Telephone~~- ~~Number,~~Entry ~~Including~~into ~~Area~~a ~~Code)~~Material Definitive Agreement

~~Check~~On January ~~the~~3, ~~appropriate~~2006, ~~box~~Gundle/SLT ~~below~~Environmental, ifInc. (GSE) issued a press release announcing the ~~Form~~acquisition ~~8-K~~of ~~filing~~the operating assets of SL Limitada, (SL), a privately owned company located in Santiago and Antofagasta, Chile. The press release is ~~intended~~attached hereto as Exhibit 99.1 and is incorporated herein by reference. The acquisition was completed pursuant to an Asset Purchase ~~simultaneously~~ Agreement, ~~satisfy~~entered ~~the~~into ~~filing~~December ~~obligation~~30, 2005 for a total purchase price of ~~the~~$15.5 million, ~~registrant~~consisting ~~under~~of ~~any~~$11 million cash at closing (December 30, 2005) and $4.5 million payable over a five year period. See description of the ~~following~~$4.5 ~~provisions:~~million obligation under Item 2.03 below, which is incorporated herein by reference.

¨Section 2 ~~Written~~- ~~communications~~Financial ~~pursuant to Rule 425 under the Securities Act (17 CFR 230.425)~~Information

¨Item 2.03 ~~Soliciting~~- ~~material~~Creation ~~pursuant~~of toa ~~Rule~~direct ~~14a-12~~Financial ~~(b)~~Obligation ~~under~~or ~~the~~an ~~Exchange~~Obligation ~~Act~~under ~~(17~~an Off-Balance ~~CFR~~Sheet ~~240.14a-12~~Arrangement ~~(b))~~of a Registrant

¨In connection ~~Pre-commencement~~with ~~communications~~the ~~pursuant~~above toreferenced ~~Rule~~acquisition ~~14d-2~~on ~~(b)~~December ~~under~~30, 2005, GSE entered into a five year installment obligation with the ~~Exchange~~Seller ~~Act~~for ~~(17~~$4.5 million, ~~CFR~~secured ~~240~~by a share pledge agreement for 30% of the equity of GSE Lining Technology Chile, S.~~14d-2~~ A., an indirect wholly owned subsidiary of GSE. The installment obligation bears interest at 5% for the first two years, converting to a variable rate based on the London Interbank Offer Rates (bLIBOR)) for the remaining term. Payments are in five annual principal and interest amounts beginning on January 1, 2007.

¨Section 9 ~~Pre~~-~~commencement~~ ~~communications~~Financial ~~pursuant~~Statements toand ~~Rule 13e-4 (c) under the Exchange Act (17 CFR 240.13e-4 (c))~~Exhibits

Item 5 9.~~02.~~01 ~~Departure~~- ofFinancial ~~Directors~~Statements orand ~~Principal Officers; Election of Directors; Appointment of Principal Officers~~ Exhibits

(bc) ~~Appointment of Director~~ Exhibits

~~On December 16, 2004, the board of directors of~~ 99.1 - Gundle/SLT Environmental, Inc. ~~(the~~Press ~~“Company”)~~Release ~~appointed~~dated ~~Richard~~January ~~E. Goodrich as a director to serve until the annual meeting of stockholders of the Company or until his successor is duly elected and qualified. Mr. Goodrich will serve as chairman of the audit~~3, ~~committee of the board of directors~~ 2006.

~~Mr. Goodrich is a~~[Signature ~~certified~~ page public accountant with 40 years experience in accounting and financial management positions. Since 1998, Mr. Goodrich has held various positions with Chicago Bridge & Iron Company, including the position of Executive Vice President and Chief Financial Officer since 2001, and Group Vice President – Western Hemisphere Operations. From 1976 until 1982, and again from 1989 until 1998, Mr. Goodrich worked for Fluor Daniel in positions that included corporate director and controller of various business units. Mr. Goodrich holds a BS in Accounting from East Central Oklahoma State University. follows]

~~SIGNATURES~~ SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned ~~hereunto~~ thereunto duly authorized.

~~GUNDLE/SLT~~DATED this ~~ENVIRONMENTAL,~~3rd ~~INC.~~day ~~(Registrant)~~of ~~By:~~January, ~~/s/ ROGER J~~2006. ~~KLATT Executive Vice President and Chief Financial Officer~~

~~Date~~GUNDLE/SLT ENVIRONMENTAL, INC. By: ~~December~~/s/ ~~16,~~Kelvin ~~2004~~R. Collard Kelvin R. Collard Vice President and Chief Financial Officer

EXHIBIT INDEX

Exhibit No.	Exhibit
99.1 —	Gundle/SLT Environmental, Inc. Press Release dated January 3, 2006.

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