... .. Composition The materials of paper magnesium fireproof board are Magnesia(MgO), Magnesium Chlorid(MgCl2) and Alkali glass fiber net. Detailed Product ... ,440mm, 915*1800mm, 900*2400mm2) Thickness: 3mm- 18mm. As for MGO foam board will be between 33mm to 50mm 3) Other ... , theatres, hospitals, train or bus terminals, airports, and school constructions. Mgo board