How To Seal A Rusty Metal Roof

Begin at the far side of the roof.

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. On raw steel or rusted metal 3 to 4 coats are recommended because the metal is very porous. He recommended a product called penetrol normally used as a paint additive to improve flow and adhesion that also seals and stops rust. 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. Scrape any cracked or peeling paint from the roof before you repaint it or the new paint coating won t adhere properly. It can be used alone as a base coat on bare metal and will fix the rust while preserving the appearance. Allow to dry for around eight hours then apply a second coat.

Apply the metal etching primer to the rusted galvanized metal roof using the roller. If any panel is extensively damaged replace it with a. You can buy rubber based roof coating from most major hardware stores. Stir thoroughly before applying it with a soft bristled roofing brush or paint roller.

However badly rusted metal areas need more prep work and possibly a special primer. 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. Rust usually won t eat holes in an aluminum roof but it can discolor the metal. On most metals two coats of everbrite clear protective coating are recommended.

Apply a solution of hydrogen peroxide vinegar and salt. We then applied a semi gloss lacquer 3 coats interior application using a deft product. This is a very important repair that could save your roof. Scrub partially rusted metal areas with a wire brush to remove flakes and powdery surface rust then prime with a rust inhibitive primer.

Roll in a vertical motion working backward toward the extension ladder. If your roof is aluminum you shouldn t. Wait three hours for the metal to dry.