... 2.0mm 2).Convenient maitance with low cost PVC waterproof membrane 1).Durable: If the pvc membranes used on exposed surfaces,the effective age ... for roof construction, subway, bridges, channel tunnel, planted roof, waterproof and drainage system, pools, dam, irrigation system, light steel roof ... Crack-25°C, No CrackImpermeability(0.3MPa*2h) ImpermeableAnti-punchImpermeable PVC waterproof membrane