(1) Introduction of Commodity Elastomer (SBS) modified asphalt waterproofing membrane is modified asphalt waterproofing membrane which adopt polyester felt or fiberglass felt as base, and take styrene butadiene styrene(SBS) copolymerized thermoplastic elastomer as modifier. And its double sides are covered by isolated materials.Its name is shortened as SBS waterproof membrane. Implemented standard: Compulsory national standard GBl8242 2000 (2)Specification: Table 1 Variety of SBSMembranes Base Surface material polyester felt glass fibre polyethylene film PYPE GPE fine sand PYS GS mineral grains PYM GM Code: PY polyester base, Gglassfiber base, PE polyethylene film, Sfine sand, Mmineral grain membrane can be divided into type I and type II according to physical mechanical property. Package: Plastic bag per roll specification breadth:000mm. thickness: PY fiber membranes:3mm and 4mm; G fiber membranes:2mm, 3mm and 4mm. area per roll:Square meters 15 (2mm), 10(3mm)and7.5(4mm) Products series: SBSIPYPE SBSIPYS SBSIPYM SBSⅡPYPE SBSⅡPYS SBSⅡPYM (3)Application It is applicable for construction roof waterproof, underground project moistureresistant, dam anti seepage, pond and canal, and anti pollution and anti seepage of chemical and metallurgical engineering. It can be bonded directly with cement and other materials in the solidification process. The construction is simple, and basement temperature. Its life is 50 years or more. SBS waterproof membrane is suitable to adopt in cold area.