... 4.Bacteria-anti 5.All free of asbestos calcium silicate products (the submarine tunnel in Xiamen city) Characteristics:1. Fire and ... --fire and water proof, light and hard, can be used and replaced natural marble, MDF, wooden plate, ceramic facing ... Hardness: 3H-6HBasic material layer(substrate boards)-- fibre reinforced calcium silicate board, fibre reinforced cement board,glass fibre magnesium oxide ...