... :Raw material: Magnesium oxide , magnesium chloride ,fiber glass ,perlite ,wood fiber etc .Incombustible: A Grade, GB8624Fire resistance ... Specifications:Raw material:Magnesium oxide , magnesium chloride ,fiber glass ,perlite ,wood fiber etc .Incombustible: A Grade, GB8624Fire resistance : ... ,planning drilling ,nailing and cutting etc .Magnesium oxide board have been used primarily as fireproof ...