Pondage and Drainage plate is through professional mechanical structure design, it has convex platform wall thickness, and accompanied by reinforcement structure, high compressive strength, good flexibility, good drainage prevent not degrade.After through hot melt welding, resistance of plant puncture, acid and alkali resistance, ageing resistance, and it is for building waterproof formation of flexible protection, makingwhole waterproof layer enclosed space inside in the long run, not easy ageing.