... Anti-static 2)Fireproof,keep warm 3)Galvanized,painted 4)Low cost,fast delivery Roof sandwich panelDescription:1)width:950- ... used are: rock wool glass fiber, cotton, polystyrene, polyurethane, low thermal conductivity, good thermal insulation effect. 7, environmental noise prevention ... design and roll forming, and has excellent structural properties high quality,competive price roof sandwich panel