Plastisol coating

A continuous, factory controlled process in which paint is roller applied to coiled metal strip, cured in ovens and rewound before the strip is cut and formed into components. It is the basis of pre-finished steel and aluminium sheet used for roofing, cladding and rainwater goods.

Corrosion that develops at the exposed cut edges of pre-coated steel roof sheets, typically at overlaps and eaves, where the steel core is not protected by the factory coating system. It appears as coating delamination and rust creeping back from the edge, and is treated by preparation and application of edge protection coatings before it spreads into the sheet.

A coil or spray applied architectural coating based on polyvinylidene fluoride resin, valued for outstanding colour and gloss retention and resistance to ultraviolet light and chemical attack. It is commonly specified for premium metal roofing, cladding and curtain walling.

The process of coating steel or iron with zinc by immersion in a bath of molten zinc, forming metallurgically bonded zinc-iron alloy layers with an outer zinc surface. The coating protects both as a barrier and sacrificially, continuing to protect the steel at small areas of damage.