Rust Prevention

I recently came across a great solution to rust-rot forming at the inner lips of hood, doors, and trunk lids — that little line where the surface metal is bent under and welded.

After thoroughly removing surface scale and cleaning with a good cleaner/solvent, I applied two or three coats of Dow Corning silicone rubber coating. It brushes like a gray colored paint, dries rather quickly, and seals that ugly rusted area from further rot. The silicone rubber is rather expensive $7 plus per quart N but has many other uses around your BMW. so it’s well worth the price and available at any good hardware store.

Author: Gary Westervelt

4 Comments

  1. Joseph

    What if the silicone cracks and allowing poisture to gather and rust develop unnoticed?

  2. Joseph

    What if the silicone cracks and allowing poisture to gather and rust develop unnoticed?

  3. Michael

    Hi Joseph – I guess there’s always possibility of the silcone not sealing completely but Dow Corning silicone does a pretty great job of staying pliable. Depending on the extent of the rust, you could seal it with a stop rust paint (after you’ve removed as much rust as possible). But for small and/or preventative measures, the silicone is an easy solution.

  4. Michael

    Hi Joseph – I guess there’s always possibility of the silcone not sealing completely but Dow Corning silicone does a pretty great job of staying pliable. Depending on the extent of the rust, you could seal it with a stop rust paint (after you’ve removed as much rust as possible). But for small and/or preventative measures, the silicone is an easy solution.

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