... 1,good waterproof, drainage, 2.0.2mm to 2.0mm 3,ASTM standard 4,ISO certificate HDPE geomembraneFlat surface high-density ... and low temperature resistance, non-toxicity, long operational lift,3,good waterproof, drainage, anti-seepage and damp proof effects, ... anti-seepage of canal, vertical central wall, side slope, etc.).3. Municipal projects (underground project of subway and structure, anti-seepage ...