... ,fiberglass mesh,sawdust,perlite ect..Main Feature:New Eco-friendly Construction Material Glass Magnesium Fireproof Board Yide board is a kind of Eco-friendly ... center, Hospital, Library, Hall, Factory etc. 12. Further processing:Normal mgo board is with one smooth surface and one rough surface. But ... the bottomNo water drop at the bottomPASSProduction Line: fireproof insulation MgO Board