mgo board 1. Sound-insulation and sound-absorbing 2. Light weight 3. Excellent impact resistance mgo board is a kind of environmental-friendly fireproof board widely used in construction and decoration. It's made from magnesium oxide, magnesium chloride, fiberglass mesh, sawdust, perlite etc. We use, highly-purified active MgO as the main fireproof material of board, high-quality MgCl as the main ...