Physical Properties of Skidmark Geomembrane™ CLG-3231

When comparing physical properties of the various geomembrane polymers, it is important to obtain the cost of all materials that are required when used as a canal liner. Additional materials may include felt underlayment and gravel ballast. These materials are necessary to protect the liner against puncture from the canal bed and from the gravel ballast added above the liner needed to prevent the liner from floating up. Affordable proposals of other polymers commonly specify 40 or 45 mils thickness. Skidmark Geomembrane™ usually will not require ballast and no padding.



Test Method 

Minimum Average 

 Color Black
 Surface Finish Texture X Matt
 Thickness - mils ASTM  D5199100 
 Thickness - mils ASTM  D599486 
 Asperity height - mils 14
 Density - g/ccASTM  D792 1.19 
 Weight - lbs./sq' .59 
 Hardness - Shore AASTM  D2240-91 90 - 95 
 Tensile - Break strength - lbs/in.ASTM  D6693 60 
 Tensile - Break elongation - %ASTM  D6693 215 
 Tear resistance - lbs.ASTM  D1004 19 
 Puncture resistance - lbs.ASTM  D4833 55 
 Multi-axial tensile - elongation @ rupture - %ASTM  D5617 52 * see below
 Aging/Ozone resistance ASTM  1149-07 (B)Pass ** see below
 Flammability FMVSS-3Q2Pass 
 Water contamination - TCLP MetalsEPA Method 200.8 R 5.5 Pass *** see below
 Phthalate leaching Method 525: APPass **** see below 


Multi-axial tensile mode of failure - pinhole leak

**  Ozone test - no cracks @ 7X magnification

***  Water contamination - meets criteria for Washington State protection of aquadic life in fresh water.

****  Phthalate leaching - does not exceed EPA criteria

These typical results are based on test procedures that are believed to be reliable. Due to variable conditions or methods of processing, NO GUARANTEES OR WARRANTIES ARE EXPRESSED OR IMPLIED INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, nor any recommendations made to infringe on Patents. Sheet may yield slightly different results than the plaque method used in the above testing. Analysis may be done on representative samples and not on the actual product shipped to the field. The information in this document relates only to the named product or material when not in combination with any other product or materials. The user is solely responsible for all determinations regarding any use of this product and any process in its territories of interest. Envirotech Extrusions Inc. and Conveyor & Rubber Resources, LLC expressly disclaims liability for any loss, damage or injury directly or indirectly related to anyone using or relying on any of the information in this document. There is no endorsement of product or process, and Envirotech Extrusions Inc. and Conveyor & Rubber Resources, LLC expressly disclaims any contrary implication. 8/5/2010.