... incombustible (GB8624-1997)Incombustibility (min):240 minutes(GB/T9978-1999)Density:1.2-1.5g/cm3Water content ratio: ≤30%Swelling ratio ... board , suspended ceilings,exterior wall cladding, paneling ,light weight grouting panel, interior dry wall decoration board, interior wall after painting and coating. 100% Non-Asbestos Fiber Cement Board ...