1.Composite Geomembrane 2.It's a waterproof material composed of geotextile ... .8mm.Application Field:Widely used in dam, traffic tunnel, road, airport, drainage, housing, environmental preventing leakage, protection, reinforcement etc.Composite Geomembrane Specifications ... -11~-13K=1.0-9.9Width Variation cm-1.0% Composite Geomembrane