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Old 01-10-2008, 09:49 PM
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window sealant removal

I've taken the front and rear windshields out of my 72 nova using the piano wire method recommended by a fellow member, thank you sooo much!!. It took about 10 minutes a window with no damage.

There is a considerable amount of adhesive mixed with gasket material left to remove. I have scraped off as much as possible. Working inside my garage I am a little reluctant to use hot solvents like MEK. Any help would be greatly appreciated.

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Old 01-10-2008, 10:43 PM
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I have found that there is no "solvent" that cuts the stuff, generally speaking. There is rust there correct? You are going to have to paint it, right? So just take a small grinder to it with a 50 grit disc and get it done. You will find that is really the most productive way to remove it.

This is IF you really do need to paint it. I have done a LOT of those GM windows and every single one of them needed to be painted after some rust repair. If this is the case, just grind it out. Use a "Surface conditioning disc" or "clean and strip" wheel from 3M to get into the corners. DO NOT grind away the stud for the clips though. That area will need spot sand blasting to clean up. When you have clean it all up, epoxy prime it and paint. Or, simply apply the urethane to set the window over the epoxy primer. That is actually the method required by automotive manufacturers.

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Old 01-11-2008, 11:10 PM
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Take some of the sealant and make a ball. Dab it on the pinch weld and it should pick the sealant up.
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Old 01-12-2008, 09:17 AM
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Originally Posted by DougMN
Take some of the sealant and make a ball. Dab it on the pinch weld and it should pick the sealant up.
If this is butyl that's exactly how you do it, wad it up into a ball and push the ball on and pull it up and it will lift the adhesive as you go. If it is a urethane you'll just have to scrape and grind as necessary. I've used piano wire for glass removal on these old cars for years and can't remember that last time I broke a piece of glass. I remember explaining the proceedure awhile back on this forum-maybe that's where you got the info from? Glad to hear it worked well. Bob
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