... of PVC and ASA, is a special coextruded roofing tile with high technology. ASA(Acrylonitrile, Styrene, Acrylic composition) is an ... , mechanical and physical properties, corrosion resistant. Degao PVC roof tile, as the country advocates and promotion of a new ... sound insulation, heat preservation and heat insulation, low and high temperature resistance, waterproof, stable volume, etc. It is widely ...