... Description:GREATVISION(SHENZHOU) brand HDPE geomembranes are a kind of large molecule (macromolecule) polymer as the basicraw material composed of ... wastes, construction & explosive rubbish, etc)2. water conservancy(such as waterproofing, stopping up leak, reinforcement for lake, river, channels, tunnels, ... plastic bag with shrinkage waterproof and UV stabilized PE film. waterproofing membrane - 2mm