... sound waterborne macromolecule resin, and the surface is coated with natural granules.Galvalume steel consists of Aluminum (55%), Zinc ( ... . The surface is coated with 7-layer protective ingredients of AL-Zin, macromolecule resin, natural granules, etc., therefore the ... eco-friendly products with the use of non-toxic harmless materials such as metal panels, natural granules, waterborne acrylic ...