... panel30-200mmMaterial Of Top/Back SheetCorrugated Color Steel Sheet(0. 326mm,0.376mm,0.426mm,0.5mm ... . Waterproofing,antisepsis and damp proofing, sound proof and heat insulation4. Economical and environmental friendly,can be recycle. ... exhibition halls, prefabricated houses, container houses, steel structure insulation material, and other industrial and civil buildings. Heat Insulation Sandwich Panel