本产品是以苯乙烯-丁二烯-苯乙烯（SBS）嵌段共聚物改性沥青作为涂覆层，并将改性沥青涂盖于聚酯胎基，表面覆以聚乙烯膜（PE）、细砂（S）、矿物粒料（M）所制成的片状防水卷材。

product is a kind of flexible sheet waterproof material using styrene-butadiene-styrene (SBS) modified bitumen as dipping and coating material, and the reinforcement layer is based on polyester felt, with the surface covered by isolation materials, such as polyethylene film, fine sand, mineral slice (or particle), etc.