Waterproof materials because of their different requirements for base and construction technology is also different. According to geographical location, make checks on water quality? Important points in our waterproof bathroom as an example for analysis.
Asphalt: long after the construction of volatile toxic substances, pollution of the environment, is the country that has been officially eliminated, disable the product.
Waterproof: is a flexible material, extension, and structure change of position can strain (precast slab roof, etc), mostly petrochemical products. Customers must spend several times more than the original cost in order to enjoy the same quality, or may buy a "y" in stock.