... insulation and sound-absorbing 3.Excellent impact resistance Magnesium oxide board is a kind of environmental-friendly fireproof board ... used in construction and decoration. It's made from magnesium oxide, magnesium chloride, fiberglass mesh, sawdust, perlite etc. We ... wall system.Especially suitable for office building, home, hotel, super market, shopping center, hospital, library, hall, factory or ...