Rock Wool Sandwich Panels is made of 2 layers weatherproof color-plating steel plates or other metal plates and mineral wool sandwiched which is the best fireproof materials. It is suitable for various roofs and walls referring to the large-size factory buildings, storages, exhibition halls, freezing stores, purifications workshops, etc, which features temp-keeping, heat insulation, weight-bearing, weatherproof with the rich colorfulness and good appearance.