... wastes, construction & explosive rubbish, etc)2. water conservancy(such as waterproofing, stopping up leak, reinforcement for lake, river, channels, tunnels, damsand ... engineering of building; and liner of roof pool, roofgarden's waterproofing, sewage channel, etc)4. garden(backing & slope protection of ... : plastic bag with shrinkage waterproof and UV stabilized PE film. waterproofing membrane - 2mm