Calcium silicate board 1220*2440mm Size:1220*2440*4.5-18mm Feature:fireproof,waterproof,soundproof,high strength,durability PartitionWall Panel. Description: Calcium silicate ... mixture of natural fiber as reinforcing material.Features: waterproof, fireproof, sound insulation, pro-environment,high strength,impact-resistant, ... warehouse, apartment building and so on. 1220*2440mm Calcium silicate board