... -2.5mm 5. It is cheaper than hdpe geomembrane Water proof LLDPE geomembrane 1.Feature:Good mechanical properties, high tear strength ... the anti-dam, plugging, reinforcement of the canal seepage, the vertical wall of the heart, slope protection, etc.).3) Municipal Engineering ... × 10-137Range of operating temperature °C+70 through -70 Water proof LLDPE geomembrane liner