... Decoration & Energy-efficiency consists of four core technolygy: special aluminum-zinc coated metal board, hard Polyurethane foaming, reflecting layer ... at the same time, the material is combined with aluminum foil paper on the back, which guaranteed Duole Sandwich Panel ... : brick-texture, stone-texture, mosaic-texture, rind-texture, aluminum-board-texture etc. The patterns are rich and colorful and ...