... asbestos. 5. Light weight but durable. PRODUCT DATA Raw Materials:MgO, MgCl, Perlite, Fiberglass, non-woven fabrics.Water Absorption:23%, ASTM ... :27Non-Combustible:ASTM E136, E84-05. ASTM E119Magnesium Oxide Board (MgO Board) is one of the only negative CO2 building materials ... Wall LiningEaves and Staff LiningPre-fabricated Shelter-Internal/External walls Mgo Board