Due to the dust and oil pollution sticking on cladding face and worse environmental conditions, the modern building facades easily come to gray. By utilizing a newly-developed coating technology, and form a compact coating layer TiO2 included in, can not only prevent the dust, organical contamination from sticking on its surface, but also decompose organic contamination, and therefore keep the appearance of building clean longer. Characteristic: 1. dust and organical contamination unsticken, 2. decomposing orgnical contamination, 3. easy cleaning (can be cleaned easily by water washing), 4. super property in color maintenance, 5. superior weather resistance. Description: Standard size: ***0mm x ***0mm x 4mm / ***0mm x ***0mm x 3mm Aluminum skin thickness: 0.*1mm, 0.3mm, 0.4mm, 0.5mm Optional length: upon request, max up to ***0mm Core layer: recycled Polyethylene, virgin polyethylene Coating finishes: PVDF, Polyester