How To Seal A Rusty Metal Roof

Roll in a vertical motion working backward toward the extension ladder.

How to seal a rusty metal 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. This is a very important repair that could save your roof. 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. 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.

Scrub partially rusted metal areas with a wire brush to remove flakes and powdery surface rust then prime with a rust inhibitive primer. We then applied a semi gloss lacquer 3 coats interior application using a deft product. Apply the metal etching primer to the rusted galvanized metal roof using the roller. On raw steel or rusted metal 3 to 4 coats are recommended because the metal is very porous.

Begin at the far side of the roof. Once done you can paint over rust. Rust usually won t eat holes in an aluminum roof but it can discolor the metal. It can be used alone as a base coat on bare metal and will fix the rust while preserving the appearance.

He recommended a product called penetrol normally used as a paint additive to improve flow and adhesion that also seals and stops rust. You can buy rubber based roof coating from most major hardware stores. Allow to dry for around eight hours then apply a second coat. Apply a solution of hydrogen peroxide vinegar and salt.

However badly rusted metal areas need more prep work and possibly a special primer. The seal should last a couple of years with the bonus benefit of adding a layer of insulation to your mobile home. Stir thoroughly before applying it with a soft bristled roofing brush or paint roller. If your roof is aluminum you shouldn t.

On most metals two coats of everbrite clear protective coating are recommended. Wait three hours for the metal to dry. Start with a wire brush photo 1.