Colour coated, or pre-painted, steel, is steel coil to which a paint, powder or film coating has been applied in a continuous process prior to it being cut and shaped. It provides a durable uniform surface finish, and can be an alternative to conventional post-manufacture painting of steel parts. The coil is coated on one or both sides. Rolls apply first a primer and then a topcoat to the moving steel strip. The substrate is usually cold reduced galvanised coil, but galvanised HRC and even uncoated coil is used.
Building applications account for around two thirds of consumption, with cladding on steel frame buildings a well known use. It is also widely used for domestic appliance casings and for some furniture.