PVC waterproof membrane 1).Long life 2).Safe,environment-friendly PVC ... channel tunnel, planted roof, waterproof and drainage system, pools, dam, irrigation system, light steel roof ec Item N L W ... Change on Heating ≤3.01.51.52.01.01.0 Foldability at low tempreture-20°C, No Crack -25 ... °C, No Crack Impermeability(0.3MPa*2h) Impermeable Anti-punchImpermeable PVC waterproof membrane