GC sheet (circular corrugated roofing sheet) is strength along with long spanning capabilities. It can be used as roofing as well as cladding. Color coated roofing sheet is the pre coated profiled galvanized, galvalume, iron sheets, which is an absolutely new concept in roofing materials and give a vast versatile uses of it and is most suitable for Indian economic markets. Color coated sheets Zinc-Aluminium alloy materials conform to to ASTM. Color coated sheets material are prepared with a multilayered coating system to ensure long life and optimum coating adherence. The base material is pre-treated, before applying a corrosion resistant primer and top coat.