How To Seal A Rusty Metal Roof

This is a very important repair that could save your roof.

How to seal a rusty metal roof.

Once done you can paint over rust. 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. On most metals two coats of everbrite clear protective coating are recommended. Roll in a vertical motion working backward toward the extension ladder.

If your roof is aluminum you shouldn t. Apply the metal etching primer to the rusted galvanized metal roof using the roller. You can buy rubber based roof coating from most major hardware stores. We then applied a semi gloss lacquer 3 coats interior application using a deft product.

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. Stir thoroughly before applying it with a soft bristled roofing brush or paint roller. Allow to dry for around eight hours then apply a second coat. It can be used alone as a base coat on bare metal and will fix the rust while preserving the appearance.

Everbrite will seal moisture out of rusted metal to help prevent further corrosion and will prevent rust stains. Apply a solution of hydrogen peroxide vinegar and salt. On raw steel or rusted metal 3 to 4 coats are recommended because the metal is very porous. Scrub partially rusted metal areas with a wire brush to remove flakes and powdery surface rust then prime with a rust inhibitive primer.

Start with a wire brush photo 1. If any panel is extensively damaged replace it with a. Rust usually won t eat holes in an aluminum roof but it can discolor the metal. He recommended a product called penetrol normally used as a paint additive to improve flow and adhesion that also seals and stops rust.

Begin at the far side of the roof. Scrape any cracked or peeling paint from the roof before you repaint it or the new paint coating won t adhere properly. 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.