... impact resistance Calcium silicate board is a composite material made of sand, cement and cellulose fibers. Calcium silicate board is manufactured in ... is wall partition water proof calcium silicate wall board product description Raw Materials: Cement, Quartz Sand, Fiber Basic Color: Gray, invory , ... 540pcs 21000 20 1220mmx2440mmx12mm 410pcs 21000 20 waterproof wall board, fibre cement board