Paint for rusty metal roof. Instead use a heavy power washer or a light sand blaster to blast away all the loose flaking rust. The enamel keeps oxygen away from the metal and inhibits further rusting. Painting a rusted metal roof.
Metal roofs have a lot of movement and would cause the epoxy to crack and sheer. Prime the rusted areas with noxyde and allow to cure. For stubborn metal roof rust that somehow survives a power blasting try trisodium phosphate tsp.
It is then sealed with a clear enamel. Typically these go on white and cure black. Get rid of metal roof rust.
Not for use on flat roofs or non metallic roofing materials. Water blast clean the prepared surface to remove all remaining dust and contaminants leaving a clean dry surface. Let the roof dry out thoroughly before applying noxyde coating.
Not intended to fix leaking roofs. Once youve conditioned the galvanized metal to accept paint apply a rust inhibitive primer to prevent a recurrence. If properly painted the paint will not only improve the appearance but protect the roof from further rusting.
Rust will reappear in an even coating on the surface of the metal almost as soon as the metal comes into contact with water both when washed down and in the air. Epoxy coatings are too rigid and lack the elongation needed for a metal roof. You can also use oil based alkyd paint but you need to first apply an undercoat of a galvanized metal primer such as sherwin williams pro industrial pro cryl universal acrylic primer.
The water or sand will also remove dirt mildew and flaking paint from the surface. A well done paint job can last for several years. Then put down whatever color of metal compatible paint you want.
Paint will not adhere to your metal roofing unless you apply an etching primer first. Hand or power tool clean the rusty metal to remove any flaky rust and unsound paint. They both reverse the oxidation rust turned back into iron and provide a good surface for painting.
Someone above mentioned aluminum asphalt roof coating. Use high quality paint for the best results. Paint all exposed areas with rust pits or not with a rust reducer paint available at any hardware store.
You can update your roof and prevent further rusting by cleaning it up and giving it a fresh coat of paint. Paint over the primer with a water based metal roof paint that contains rust inhibitors.