How To Seal A Rusty Metal Roof

If any panel is extensively damaged replace it with a.

How to seal a rusty metal roof.

Scrub partially rusted metal areas with a wire brush to remove flakes and powdery surface rust then prime with a rust inhibitive primer. Apply a solution of hydrogen peroxide vinegar and salt. This is a very important repair that could save your roof. You can buy rubber based roof coating from most major hardware stores.

On raw steel or rusted metal 3 to 4 coats are recommended because the metal is very porous. Roll in a vertical motion working backward toward the extension ladder. Wait three hours for the metal to dry. He recommended a product called penetrol normally used as a paint additive to improve flow and adhesion that also seals and stops rust.

Allow to dry for around eight hours then apply a second coat. I have a 20 gauge cold rolled steel that has been cleaned w soap water and then we applied a solution of water acid to speed up the rusting process. Scrape any cracked or peeling paint from the roof before you repaint it or the new paint coating won t adhere properly. Apply the metal etching primer to the rusted galvanized metal roof using the roller.

If your roof is aluminum you shouldn t. Everbrite will seal moisture out of rusted metal to help prevent further corrosion and will prevent rust stains. Rust usually won t eat holes in an aluminum roof but it can discolor the metal. Stir thoroughly before applying it with a soft bristled roofing brush or paint roller.

It can be used alone as a base coat on bare metal and will fix the rust while preserving the appearance. However badly rusted metal areas need more prep work and possibly a special primer. Begin at the far side of the roof. Use a zinc based primer on any areas where rust has been scrubbed or sanded away allowing it to dry before applying the protective roof coating or seal.

Once done you can paint over rust. As it dries the acid of the vinegar will begin to corrode the surface of the metal and you will start to see rust appear. The seal should last a couple of years with the bonus benefit of adding a layer of insulation to your mobile home.