Quote:
Originally Posted by AirSpeed
......Who ever replaced the windshield in my truck before I bought it used sealer, everywhere he used it the windshield frame rusted, it took forever to scrape it all out and clean up the rust. I think sealer would actually make things worse by holding water and dirt in there.
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It isn't the sealer, per se, but the KIND of sealer. If you use a silicone sealant, be absoutely positive that it is an automotive variety. Silastic, a silicone sealer/adhesive, gives off glacial acetic acid, as it cures. That acid will cause rust. My '69 cab had what must have been about three tubes of it, daubed everywhere it didn't need to be. My firewall was swiss cheese.
Glass shops nowadays, use urethane. I don't think we need it for the gaskets in our trucks, but I'm sure someone on here knows for sure....whether we need anything, or nothing. Nothing would be better than the wrong thing. Maybe some 3M weatherstrip adhesive is all we need, and I know it's an automotive grade.....yeah, that stuff we also call "snot" in a tube. Use the black, though.
Here's what the GE Silastic will do: