I need window gaskets and help with the installation

Question:

I have a 1962 Canadian Pontiac Strato-Chief that has both front and rear windows leaking due to the original rubber gasket being hard and cracking.

I will need to replace the rubber but would like to know the best procedure (and possible recommended sealer) for a 100% leak-free installation.

I wonder if I could forgo the old rubber gasket and use a “more modern” urethane and dam technique like that found on late 60s, and early ’70s GM cars. I mentioned urethane because I believe the old Thiokol is no longer available. Thank you.

Answer:

Steele Rubber Products offers the original replacement rubber you need. I have used their products for years and have found that they hold up well, and look great.

After you remove your rear window, peel back the old rubber and sealant so you have a clean pinch molding to work with. Any rust or deterioration should be repaired in order to prevent leaks and adhesion problems.

The special sealer (3M 08690 Fast Cure Urethane) you need for sealing is obtainable from glass shops and auto paint stores or you can get it at Amazon on the Internet. Never use ordinary hardware store silicone because it will not seal adequately. Put a bead of 3M urethane in the groove that goes around the glass, and then wrap the gasket around the glass and press it into place. .

Now shoot a bead of urethane sealant all around the pinch molding. Lay stout

string or twine in the groove of the rubber seal and have a friend press the windshield into place while you gently pull the string from inside the car to coax the rubber seal to come out over the pinch molding. Finally, shoot sealer under the inside and outside lips of the rubber gasket and clean off the excess. Classic car windshield and rear window rubber seals are available at:

Steele Rubber Products steelerubber.com