Glass Magnesium Oxide Board Supplier: 1, Soundproof and heat preservation 2,Environmental protection 3,waterproof Glass Magnesium Oxide Board Supplier (MGO Boards )Composition:It is made of magnesium oxide, magnesium chloride, fiberglass mesh, perlite, saw dust, etc.Main features :1. Fireproof:It reaches the standard of GB8624, CLASS A, non-combustible class2. Waterproof:It can keep its shape and ...