This prepainted colour coated steel coil starts from a continuous hot dip galvanized substrate carrying a zinc coating mass adjustable between Z60 and Z275 g/m2, then receives a two coat two bake organic finish on a continuous painting line. Roofing producers running coastal warehouses, agricultural sheds and residential estate roofing normally specify the heavier end of the range, because every additional gram of zinc buys measurable service life before red rust appears at cut edges and fastener holes. The coil is supplied in thicknesses from 0.20 mm to 1.00 mm and in widths from 700 mm to 1250 mm, so a single purchase order can feed a complete roofing profile programme without re tooling, and the zinc class can be documented coil by coil for tender submission.

• Zinc mass flexibility: Coating classes from Z60 through Z120, Z180 and Z275 g/m2 allow one product family to serve inland cladding and salt spray coastal roofing without changing supplier.
• Roofing grade substrate: Hot dip galvanized DX51D plus Z and SGCC base coils deliver the flatness and uniform mechanical properties that roll forming of trapezoidal and standing seam profiles demands, with no wave or twist in the finished panel.
• Two coat two bake curing: Primer and colour coats are cured in a continuous oven at controlled peak metal temperature, producing a film that resists chalking, colour drift and gloss loss through repeated rain and ultraviolet cycles.
• Documented coating mass: Zinc mass is verified by weigh strip samples and reported per coil, so incoming inspection compares against the purchase specification instead of relying on visual judgement.
• Cut edge protection: The galvanized layer protects sheared edges, drill holes and fastener penetrations galvanically, which is the failure point on most painted roofing where the organic film alone cannot protect the steel.
• Slitting and shearing support: Coils ship full width or processed to the exact slit width of your roll former, cutting on site scrap for buyers who do not operate their own slitting line.

Roofing and wall cladding dominate the application of this coil. Corrugated and trapezoidal profiles, standing seam panels, ridge caps and flashings all come from the same heat of steel, which keeps colour consistent across a finished roof. Agricultural buildings, factory sheds, warehouse roofing and residential estate roofing are the highest volume outlets, while the heavier zinc classes extend the product into coastal and industrial atmospheres where salt spray and sulphur dioxide accelerate attack. Panel fabricators also use the same coil for purlins, gutter sections and rainwater goods, where a painted galvanized surface replaces post painting of the finished component entirely.

Coils are wrapped with waterproof paper interleaf, fitted with fibreboard edge protectors and strapped on wooden skids for container loading. Each coil carries a label showing heat number, zinc mass, coating thickness, size and net weight. Standard packing suits 20 foot and 40 foot containers in eye to sky orientation, and eye to wall loading is available on request. Mill test certificates, coating mass reports and a dimensional inspection sheet travel with every shipment, and a retained sample length from each lot is kept for twelve months so any claim can be traced to the producing coil.