The product is employs asphalt or thermoplastic elastomer (styrene â?? butadiene block copolymer SBS), modified asphalt impregnated base. Both sides are coated with elastomer or plastic bitumen,upper surface is sprinkled with fine sand , mineral grains (membrane) or coverage polyethylene film,and underside with fine sand or coverage from polyethylene membrane. The product has good waterproof performance and anti-aging performance, and has the characteristics of not flowing at high temperature, not brittle crack at low temperature, simple construction, no pollution, long service life.It is mainly used in the industrial and civil building roofingã??bathroomã??basementã??pond , bridge, parking lot, swimming pool, tunnel, reservoir and other buildings waterproof, moisture-proof, waterproof steam.Impermeability and maintenance of asphalt roofing.sbs Modified asphalt waterproof rolling material is especially suitable for waterproofing of buildings in cold areas and areas with frequent structural deformation.