best way to seal the windshield/back glass?

Tim65GT said:

He insisted that with the rubber channel type gasket, it doesn't need any sealer. YEAH, RIGHT.

The first time I was caught in rain (rare around here...usually) THEY BOTH LEAKED!

I am also wondering what product is the best to use.

Click to expand...

Yes, they will tell you this but don't believe it! After many years and countless windshield replacements, here is the technique that works best for me:

1. Thoroughly clean the area the windshield sits on and the lip it grips. Chunks of old crap here will cause leaks almost no matter what else you do.

2. Install the rubber seal onto the windshield. Run a length of clothesline through the channel that will grip the car and leave the ends hanging out.

3. Lay down a good bead of 3M Bedding & Glazing Compound on the outside of the lip and in the corner area.

4. Lay the windshield/seal assembly on the lip. Get inside the car and pull the ends of the clothesline to work the rubber seal around the lip.

5. From the outside, inject 3M Bedding & Glazing Compound between the seal and the glass all the way around.

6. Clean up the excess goop with some wax & grease remover or something similar. A razor blade scoops up most of it nicely.

I've never had a windshield leak using this method. The 3M product stays soft forever, so as the car and the glass move, expand, contract, etc. it will stay sealed. I use 2 full tubes of the stuff on a windshield install. Don't scrimp on it.