Zinc Colorful Stone Coated Metal Roofing Tile The characteristics of this production are: 1.Light weight: weight of per square meter is only one sixth of the traditional concrete clay tiles. 2. Energy saving: reduce the cost of transportation, storage and installation. 3. Durability: both zinc-aluminum and stone-chip coating are non-organic material. The lifetime can be extended as long as 30 years. 4.Recyclability: 90% or above of the tiles are recyclable at the end of a long economic life. 5.Aesthetic appeal: extensive flexibility of colours and profiles provide various building the perfect match. 6.Easy installation: the tiles can be installed over wood or steel battens and any simple surfaces and structures by only several nails. 7.Weather extremes resistance: fire reststance, premium performance in earthquake, snow resistance weight bearing anti-sliding, wind resistance, storm resistance, hailstone resistance and safety in lightening. 8. Various Styles & Colors: red, black, coffee, green, blue, gray, orange, red+black, coffee+black and so on. Material Composition----Panel Layers 1)Steel The panels are structural grade steel, with a minimum tensile strength of 37ksi. They are rigid enough to tolerate reasonable loads, while allowing profile designs with out the risks of cracking or significant elastic recovery. 2)Aluminum-Zinc Alloy Coating Protection for the rigid steel material is achieved when the steel passes through a bath of molten aluminum-zinc alloy. This coating combines the protection and strength of both aluminum and zinc. A significant benefit of the zinc component is its ability to protect exposed areas such as cut edges, drilled holes and scratches. Developers of the aluminum-zinc alloy coated steel have captured exposure data indicating corrosion protection of the underlying steel for more than 50 years in most environments. 3)Acrylic Priming System An acrylic coating is applied to both sides of the panel immediately after the application of the aluminum-zinc coatings. We developed this priming system in association with our steel suppliers to provide a uniform substrate that enhances the adhesion of subsequent coatings. 4)Basecoat; The basecoat is formed by applying a custom designed acrylic resin binder. This specially formulated paint coating is made in two colors that will blend with the various stone granule colors. The basecoat serves two functions: ----a)It serves as an adhesive that bonds the stone granules to the base steel. ----b)It protects the underlying material from water and UV light. The basecoatâ??s adhesion process is found in its excellent ability to adhere to both the granules and the underlying acrylic priming system. We achieve optimum UV resistance with the use of a pure acrylic resin; the strongest polymer capable of being made into a water-based paint.