... 4mm Surface:PE membrane, S-Fine sands, Mineral grains/slates Specification:Dimension: 1m x10m/roll,1mx8mThickness: 2mm 3mm 4mmSurface: PE ... membrane, S-Fine sands, M-Mineral grains/slatesStrong Points:1, Dry, strong, smooth and clean base. 2, Installation: Heating to ... to the waterproof of structure changeable and cold area. Technical Specification:Waiting for your coming no matter when !Choose us ...