Hammerite Red Oxide rust treatment primer is specially formulated for use on both bare and rusty iron and steel. This high performance primer provides a smooth protective base for overcoating with minimal sanding. For interior and exterior use. A high performance anti-corrosive formulation, quick drying, topcoat after 6 hours. Not for on aluminium, galvanised and all other non-ferrous metals, use Hammerite Special Metals Primer. Red Oxide Primer can be used for; BBQ's, fire surround, garage doors, metal garden furniture, railings and gates and radiators.