1.Material:polyester with fiberglass. 2.Specifications:120g/smí¬250g/sm. 3.Color:white and green. 4.Character:better tensility, elongation and hot shrinkage, high strength for preventing thrust, anticorrosion and anti-aging. 5.Application: 1).An ideal substrate material for asphalt roofing rolls and shingles. 2).An excellent basic material for waterproofing membrances. 3).Act as the lining for roof insulation layers to protect polyester foam insulation from the damaging effect caused by chemical solvents in bitumen so as to prolong the lifetime of heat insulation layer. 4)used for storing water pool, flooring, underground bridgeí»s surface, waterproof project, and corrosion resistance in indoor ground building bases. Polybag