Magnesium fire proof board 1.fireproof,waterproof,light weight 2. ... grain 4.any size an Magnesium fire proof board is a light weight, waterproof, fire resistant, and high quality new buliding materials ... reduction:42db(9mm wall partition system)one hour of fire rating for (9mm wall partition systemSpecial products of mgo ... . we are also developing the stucco mouldings. Magnesium fire proof board