... Geotec offers its HDPE geomembranes in white and black A white surface helps mitigate liner temperature extremes and ... tear strength N/mm≥50≥80≥1104Carbon black content of a %≥25Environmental stress cracking F20/h------------≥15006Oxidation induction ... ASTM standard)geomembrane, 0.5mm,0.75mm,1mm,1.5mm,2.0mm,2.5mm,3.0mm,3.5mm,4.0mm smooth and ... ISO High quality HDPE geomembrane(0.5mm-4mm) (supplier)