... 2.Surface material: PE film, sand,mineral,Alu PE filmSBS/APP waterproof membraneUsage range:Bridge building, storage, road, tunnel, parking ... other waterproofing project, Features: a) Conforms to the national standardsb) SBS modified bitumen waterproof membrane is specially used as waterproof material ... ElongationMaximum≥30 40 Secondly-Maximum≥ Oil LeakingPieces≤ 2 PE film SBS/APP waterproof membrane