... dipping andcovering modifier, whose upper surface is coated by PE film, fine sand, mineralgranules or aluminum foil, ... It couldbe widely used in all kinds of waterproof engineering projects in all fields,especially in the ... and roof parkinglots; 2.All kinds of underground waterproof or dampproof engineering projects; 3.Bridge surfaces of ... pools, penstocks, water pools, and soon sbs waterproof membrane