... weight but durable. PRODUCT DATA Raw Materials:MgO, MgCl, Perlite, Fiberglass, non-woven fabrics.Water Absorption:23%, ASTM-C1186.Density:Range ... and feel like hard cement plastering but is fireproof and resistant to damage from water, humidity, freezing, organisms, chlorine, salt and ... LiningEaves and Staff LiningPre-fabricated Shelter-Internal/External walls Fire resistant Magnesium Oxide Board