... roll) thickness (mm) SBS modified Asphalt waterproof Membrane 1 10 28 2SBS modified Asphalt waterproof Membrane 1 10 41 3SBS ... brand waterproof and vapor permeable membrane is polymer modified asphalt based, with surface of high strength polypropylene fiber. ... as the underlayment of cement tile, painted pottery watts and asphalt shingle. Also suitable for all kinds of architectural roofing, walls ...