... m3, fireproof rate B1 ISO certificate 1.FeatureMagnesium Plain Board (usually called magnesium oxide board ) is combined system of ... Mgo, MgCl2 and H2O and alksili agent. The stable magnesium colloid is reinforced by middle alkali glass ... , little contraction, easy constructing. Especially the unique waterproof, fireproof, corrosion proof, heat preservation and protection, Sound sbsorb, ...