C2 Windshield / rear glass question

[67HEAVEN]

Prior to installing the stainless trim around the front and rear glass, did St. Louis use any additional material, such as dum-dum, to help prevent leaks?

 

[JohnZ]

Yes, they did (only around the windshield, between the rubber and the body opening and between the rubber and the reveal moldings) - P/N 3710409 sealing compound - greasy non-hardening black stuff - 13 ounces! They really slathered it on!

 

[Ron Miller]

Sure you'll hear from someone on this, but believe something was used around the screws. But I don't believe anything else was used other than gasket sealer on the front windshield and the bedding compound for the glass on the rear coupe window.

Also, have you checked to see how it is shown to be assembled in your '67 AIM?

 

[JohnZ]

Ron, there was 13 ounces of that goo that completely filled all the gaps between the rubber and the body opening (including the clips and screws), and it was also applied to the inside of the reveal moldings before they were installed. When they were new, if they sat out in the sun on a hot day, you'd see little dribbles of the goo oozing out from underneath the moldings - dealer new car prep guys used to complain about the cleanup. The A.I.M. sheet shows it very clearly - item 69 and 69A sealing compound.

The rear glass was installed with a bead of Thiokol pumpable adhesive (just as current car glass is installed with a bead of urethane adhesive), and no additional sealers were used.

 

[Ron Miller]

Thanks, John. I was sure it would be show in the AIM if there was anything used. Do you know if there is a comparable material in use today? Looks like it could help prevent some of those mysterious water leaks under the dash that I've heard several folks ask about.

 

[67HEAVEN]

Looks like it could help prevent some of those mysterious water leaks under the dash that I've heard several folks ask about.

That is exactly what I hope to prevent. Once the stainless is ready to go back on, I'm hoping to prevent those leaks.

And, thanks John.

 

[67HEAVEN]

Yes, they did (only around the windshield, between the rubber and the body opening and between the rubber and the reveal moldings) - P/N 3710409 sealing compound - greasy non-hardening black stuff - 13 ounces! They really slathered it on!

John,

Assuming that the sealing compound is no longer available, are you aware of a good substitute?

If not, how would you describe the consistency in the container. Probably far more liquid than dum-dum, correct?

Thanks.

 

[BarryK]

Bob
I'm following this thread closely! Before my car went into the shop both my windshield and rear window leaked like a sieve ( you could actually see daylight if you looked through the seal area from the inside out on the rear glass).
with all the glass pulled for the painting and needing to get reinstalled afterwards I am hoping it will help cure the problem - I already got all new clips, screws, new gaskets, SS trim moldings, etc so hoping it will eliminate my leaking problem as the whole area will be clean, in better shape as before, and with all new hardware and gaskets. your thread is perfect timing as glass reinstall on mine should only be a week or so away

 

[JohnZ]

John,

Assuming that the sealing compound is no longer available, are you aware of a good substitute?

If not, how would you describe the consistency in the container. Probably far more liquid than dum-dum, correct?

Thanks.

Bob, the sealer was pumpable, and was applied from a nozzle on a hose from a Johnstone pump that held a 5-gallon pail of the sealer. The stuff was black, and was about the same consistency as heavy chassis grease. A reasonable substitute might be 3M Bedding and Glazing Compound, as it's non-hardening and pliable. Check with your auto body/paint supply store guy and he may have another product that's similar or superior.

 

[67HEAVEN]

Bob, the sealer was pumpable, and was applied from a nozzle on a hose from a Johnstone pump that held a 5-gallon pail of the sealer. The stuff was black, and was about the same consistency as heavy chassis grease. A reasonable substitute might be 3M Bedding and Glazing Compound, as it's non-hardening and pliable. Check with your auto body/paint supply store guy and he may have another product that's similar or superior.

I just happen to have a spare tube of...

Thanks again, John.