... carbide, low-alkali glass fiber mesh,modifierMagnesium oxide (activity 85%), magnesium chloride, sawdust, perlite, alkali glass fiber mesh, modifierMagnesium oxide (activity 80%), magnesium chloride, sawdust, perlite ... halogen and powder17Useful life 50 years10 years1 year1 month Fiberglass board,magnesium oxide fireproof board,fireproof insulation board