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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pursuant
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      the
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Section
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>Item
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">On
      January 3, 2006, Gundle/SLT Environmental, Inc. (GSE) issued a press release
      announcing the acquisition of the operating assets of SL Limitada, (SL), a
      privately owned company located in Santiago and Antofagasta, Chile. The press
      release is attached hereto as Exhibit 99.1 and is incorporated herein by
      reference. The acquisition was completed pursuant to an Asset Purchase
      Agreement, entered into December 30, 2005 for a total purchase price of $15.5
      million, consisting of $11 million cash at closing (December 30, 2005) and
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      connection with the above referenced acquisition on December 30, 2005, GSE
      entered into a five year installment obligation with the Seller for $4.5
      million, secured by a share pledge agreement for 30% of the equity of GSE Lining
      Technology Chile, S. 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 (LIBOR) for the
      remaining term. Payments are in five annual principal and interest amounts
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          <tr valign="top" style="LINE-HEIGHT: 1.25">
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            <td style="WIDTH: 36pt">
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(c)</font></div>
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            <td>
              <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Exhibits</font></div>
            </td>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; LINE-HEIGHT: 1.25; MARGIN-RIGHT: 0pt" align="justify"><font id="TAB1" style="MARGIN-LEFT: 36pt"></font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">99.1
      -
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      2006.&#160;</font><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><strong>&#160;</strong></font></div>
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      page follows]</strong></font></div>
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      duly caused this report to be signed on its behalf by the undersigned thereunto
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      this 3rd day of January, 2006.</font></div>
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          <tr valign="top" bgcolor="#ffffff">
            <td width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></td>
            <td width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></td>
            <td width="49%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;</font></td>
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            <td colspan="2"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">GUNDLE/SLT
              ENVIRONMENTAL, INC.</font></td>
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            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;<br>&#160;</font></td>
            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;<br>&#160;</font></td>
            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;<br>&#160;</font></td>
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            <td>&#160;</td>
            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">By:&#160;&#160;</font></td>
            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">/s/&#160;Kelvin
              R. Collard</font></td>
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              <hr style="COLOR: #000000" align="left" noshade size="2" width="80%"><font size="2">Kelvin
              R. Collard</font></td>
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            <td><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Vice
              President and Chief <font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Financial
              Officer</font></font></td>
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      INDEX</strong></font></div>
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                No.</font></div>
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                Environmental, Inc. Press Release dated January 3, 2006. </font></div>
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{"company-data": {"conformed-name": "GUNDLE SLT ENVIRONMENTAL INC", "cik": "0000805023", "assigned-sic": "3081", "irs-number": "222731074", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "033-62947", "film-number": "06503404"}, "business-address": {"street1": "19103 GUNDLE RD", "city": "HOUSTON", "state": "TX", "zip": "77073", "phone": "7134438564"}, "mail-address": {"street1": "19103 GUNDLE ROAD", "city": "HOUSTON", "state": "TX", "zip": "77073"}, "former-company": [{"former-conformed-name": "GSE LINING TECHNOLOGY INC", "date-changed": "19960513"}, {"former-conformed-name": "GUNDLE ENVIRONMENTAL SYSTEMS INC", "date-changed": "19920703"}]}
UNITED
      STATES
SECURITIES
      AND EXCHANGE COMMISSION
Washington,
      D.C. 20549
FORM
      8-K
CURRENT
      REPORT
Pursuant
      to Section 13 or 15(d) of
the
      Securities Exchange Act of 1934
Date
      of
      Report: (Date of earliest event reported): January 3, 2006 (December 30, 2005)
GUNDLE/SLT
      ENVIRONMENTAL, INC.
(Exact
      name of registrant as specified in its charter)
Delaware
(State
                of Incorporation)
333-118278
(Commission
                File Number)
22-2731074
(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)
Check
      the
      appropriate box below if the Form 8-K filing is intended to simultaneously
      satisfy the 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 (17
                CFR
                230.425)
o
Soliciting
                material pursuant 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))
Section
      1 - Registrant's Business and Operations
Item
      1.01 - Entry into a Material Definitive Agreement
On
      January 3, 2006, Gundle/SLT Environmental, Inc. (GSE) issued a press release
      announcing the acquisition of the operating assets of SL Limitada, (SL), a
      privately owned company located in Santiago and Antofagasta, Chile. The press
      release is attached hereto as Exhibit 99.1 and is incorporated herein by
      reference. The acquisition was completed pursuant to an Asset Purchase
      Agreement, entered into December 30, 2005 for a total purchase price of $15.5
      million, consisting of $11 million cash at closing (December 30, 2005) and
      $4.5
      million payable over a five year period. See description of the $4.5 million
      obligation under Item 2.03 below, which is incorporated herein by
      reference.
Section
      2 - Financial Information
Item
      2.03 - Creation of a direct Financial Obligation or an Obligation under an
      Off-Balance Sheet Arrangement of a Registrant
In
      connection with the above referenced acquisition on December 30, 2005, GSE
      entered into a five year installment obligation with the Seller for $4.5
      million, secured by a share pledge agreement for 30% of the equity of GSE Lining
      Technology Chile, S. 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 (LIBOR) for the
      remaining term. Payments are in five annual principal and interest amounts
      beginning on January 1, 2007.
Section
      9 - Financial Statements and Exhibits
Item
      9.01 - Financial Statements and Exhibits
(c)
Exhibits
99.1
      -
      Gundle/SLT Environmental, Inc. Press Release dated January 3,
      2006.
[Signature
      page follows]
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 thereunto
      duly authorized.
DATED
      this 3rd day of January, 2006.
GUNDLE/SLT
              ENVIRONMENTAL, INC.
By:
/s/ Kelvin
              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.