... geomembrane 1,good waterproof, drainage, 2.0.2mm to 2.0mm 3,ASTM standard 4,ISO certificate HDPE geomembraneFlat surface high-density polyethylene (HDPE) geomembrane ... Product survey1Tianhai smooth HDPE geomembrane is produced from high-grade polyethylene ... ,Good physical and mechanic performance, high tearing resistance, strong deformation adaptability, ...