Prepainted steel coils/sheets are also called as color coated steel coils/sheets, generally are made by coating (roll coating) a layer on the substrate or bonding organic film and then baking into final coils/sheets. The substrates are galvanized steel coils (PPGI) or galvalume steel coils (PPGL), aluminum coils (PPAL).

Prepainted steel coils/sheets are new building material developing rapidly in recent years all over the world. It undergoes chemical pretreatment, initial coating, final coating and other processes in a continuous production line. The coating is uniform, stable and ideal, much better than the individual spray coating or brush painting of the shaped metal parts.

Prepainted steel coils/sheets have excellent decoration, shaping, and good corrosion resistance properties. The coating adhesion is good and will not be changed for a long term. Because the prepainted steel can replace the wood, it is an efficient construction material, with energy saving, preventing pollution and good economic effect.