[Randy Nix]

Can I reuse the windshield gasket when I change the windshield? I have a '77 that's broken but I have a parts car with a good glass. Thanks.

Randy Nix - TN

 

[johnb510]

Not sure, but if the gasket is hard, it is not worth the trouble. Will risk breaking the glass on the install. Gasket must be able to be pliable to fit the glass. Best bet is to get a new gasket and let a glass shop do the install. That way they are responsible for any breakage or leaks.

 

[bakachan]

ive done it before but its not fun. the harder rubber is a bear to work with
its best to do it on a hot day and use plenty of good because the gasket is
used to a slightly different opening

 

[escanlon]

I've had to work with old rubber also, and it is a pain. I found that there were a few things to be careful of.

Make sure any old adhesive is removed, otherwise you may have a lump underneath the rubber or glass that will cause problems on remounting.

Check for tears, cracks, or gouges. Not only are they potential leak areas, they can be the beginning signs of more problems.

If possible, immerse the whole gasket in a tub of very warm / hot water. This will make it a bit more pliable and easier to insert. If it is still too stiff after this, don't even bother using it, the elastomers in the rubber are long gone, and all you are going to do is tear it trying to get it into the car with a new windshield inserted.

FWIW