... quality galvalume steel as the substrates. The surface is coated with 7-layer protective ingredients of AL-Zin, macromolecule resin, ... resistance, corrosion resistance, aging resistance,and long service year.5,Safe With the unique water proof, wind proof, the nailed installation ... handy, easy work in any buildings, especially in conducting safe work of a steep slope roof .7,EconomicalThe roofing tile ...