... composite material made of sand, cement and cellulose fibers. Calcium silicate board is manufactured in a sheet form and is used not ... water proof calcium silicate wall board product description Raw Materials: Cement, Quartz Sand, Fiber Basic Color: Gray, invory , off-white, pure ... 540pcs 21000 20 1220mmx2440mmx12mm 410pcs 21000 20 waterproof wall board, fibre cement board