1.water proof 2.heating insulation 3.fireproof 4.anti-rust 5.sound insulation 6.long life span: more than ... , Gray, TephrosiousGuarantee Period15~20 yearsCharacterLight in weight, heat insulation, water resistant, green and environmentalUsevarious roofs and walls referring ... compound building material.2. Light in weight, heat insulation, water resistant, green and environmental3. It has handsome ...