Color Stone Coated metal Roof is based on Al-Zn(Known as Zincalume or Galvalume steel)steel. The before and after protective film treatment, together With high precision pressure-shaped gravel ensure the roof to be the best roofing material. Coated With an alloy composed of Al 55%, Zn 43.4%,Si 1.6%, with Non-toxic acrylic adhesive and natural stone, Color Stone Coated metal Roof provides the advantages of long life, strength, durability and beauty.