... layer: Color steel sheetMiddle: polystyrene foam board or polyurethane foam boardThicknessColor steel sheet: 0.3-0.6mm ... factory buildings, storages, exhibition halls, gymnasiums etc.The sandwich panels used for large industrial plants, warehouses, stadiums, supermarkets, ... shop and the required thermal insulation fire place. Sandwich panels, beautiful appearance, bright color, the overall effect of ...