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Windshield sealing*NEW question #2905844
04/03/21 02:23 PM
04/03/21 02:23 PM
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Central Florida
larrymopar360 Offline OP
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I had a professional company, in business for 40 years and specializing in the older stuff come out and put new seal (I had new windshield on hand because old one was de-laminating) on my '79 Power Wagon. I had removed old one myself and thoroughly cleaned channel myself. There was ZERO rust and I cleaned it to like new. First rain came and it leaked like a sieve. Worse than the decades old one. HEAVY drips from top. VERY heavy around driver's corner (maybe just runs that way). Passenger side floor very wet too, and never got wet there.

They had run some urethane sealant, lock strip seemed to fit very well, and they seemed to know what they were doing. Any tricks I should know about for when they come out and re-do this?

Thanks.

Last edited by larrymopar360; 04/18/21 02:38 PM.

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Re: Windshield sealing [Re: larrymopar360] #2905857
04/03/21 03:20 PM
04/03/21 03:20 PM
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Andrewh Offline
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so not sure about your truck, but I remember reading somewhere the newer glass was thinner and caused sealing issues because of it.
The rubber seals were set with the older glass in mind.

Re: Windshield sealing [Re: Andrewh] #2905886
04/03/21 04:49 PM
04/03/21 04:49 PM
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larrymopar360 Offline OP
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Originally Posted by Andrewh
so not sure about your truck, but I remember reading somewhere the newer glass was thinner and caused sealing issues because of it.
The rubber seals were set with the older glass in mind.
Um, didn't feel like it. I wasn't really looking for it either though. I'll look when we pull it out. Got the windshield from LMC.


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Re: Windshield sealing [Re: larrymopar360] #2905895
04/03/21 05:07 PM
04/03/21 05:07 PM
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challengersteve Offline
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Hello, we install glass and windshields on vintage mopars at my shop.
What happened probably is they tried to use urethane sealer with the windshield gasket and this WILL NOT WORK.
You are going to have to pull the glass back out and probably get another gasket. You will need to reinstall the glass with a new gasket and before the lock strip in put into place you need to seal the gasket to the glass and also seal the gasket to the body with Auto Bedding and Glazing Compound, 3M part number 08509. This is basically liquid butyl rubber and is designed to stay flexible. The urethane dries super hard and will not properly seal to this rubber gasket.
I see this on a regular basis with these glass install companies as they mainly work on late model cars and are pretty clueless on antiques.

Last edited by challengersteve; 04/03/21 05:08 PM.
Re: Windshield sealing [Re: challengersteve] #2905909
04/03/21 06:03 PM
04/03/21 06:03 PM
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larrymopar360 Offline OP
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Thank you for this info challengersteve! They did use urethane, I just don't remember in what spots.

Could you please tell me the exact order of the procedure, step by step?

This to body: Auto Bedding and Glazing Compound, 3M part number 08509. Install gasket, then put glass in, then Auto Bedding and Glazing Compound, 3M part number 08509 inside lock strip groove, and install lock strip? Is this correct order?




Thanks! Larry

Last edited by larrymopar360; 04/03/21 08:23 PM.

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Re: Windshield sealing [Re: larrymopar360] #2906407
04/04/21 06:22 PM
04/04/21 06:22 PM
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challengersteve Offline
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Hello Larry, the way I do it is like this: clean all window channels of all old sealer, wiper channels down with oil and grease remover, install gasket and glass. Then once the glass is in, and before you install the lock strip, take your glazing compound put the tip of the applicator in the area between the gasket and the body and go around the perimeter. Once that is done do the same thing only this time between the gasket and glass outside.
Make sure you tape off everything and wear rubber gloves as this stuff is MESSY!!
Once the sealer is there you clean off the excess and install the lock strip and reveal mouldings.
Good luck and if you have any questions let me know.

IMG_4744 (1).JPG
Re: Windshield sealing [Re: challengersteve] #2906422
04/04/21 06:41 PM
04/04/21 06:41 PM
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Andrewh Offline
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how much sealer do you need?
1 tube enough or 2?

Re: Windshield sealing [Re: Andrewh] #2906539
04/04/21 08:39 PM
04/04/21 08:39 PM
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larrymopar360 Offline OP
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Thanks so much Steve! I really appreciate the info and picture. I want to have my truck ready for them (again). I had the glass channel all clean and free of all old sealant etc. the first time. I guess it's going to be much worse this time with the new sealant to remove! And removing a brand new windshield without breaking will be more nerve wracking than removing my old one in which I wasn't worried if I shattered (it didn't).

Thanks again!

Larry


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Re: Windshield sealing [Re: Andrewh] #2906553
04/04/21 08:56 PM
04/04/21 08:56 PM
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NW Arkansas
challengersteve Offline
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usually one tube will be enough

Re: Windshield sealing [Re: challengersteve] #2906571
04/04/21 09:45 PM
04/04/21 09:45 PM
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Andrewh Offline
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thanks.

Re: Windshield sealing [Re: challengersteve] #2906613
04/05/21 12:28 AM
04/05/21 12:28 AM
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Looking for a way out of Middl...
IMGTX Offline
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Steve,

Sorry to high jack this thread but years ago when i did a lot of the E-body style windows with the butyl tape. They used to sell and a pinch weld primer and a glass primer. It's not the same glass primer they sell now that is to repair the blackout along the edge of the window glass. They helped the bond between the butyl tape and the glass/paint.

Do you know of a 3M part number for them? Last time i looked for it I couldn't find anything like it, and neither could the guy at NAPA.

Thanks

Re: Windshield sealing [Re: IMGTX] #2906795
04/05/21 10:25 AM
04/05/21 10:25 AM
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Armada MICH.
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Challenger Steve is right on the money, this is the 3m product that I use, for rubber seals as the OP asked .

https://www.autobodytoolmart.com/pr...ound-black-08509/automotive-seam-sealers


For Urethane/ Butyl installs , you can use this primer which is supposed to be black in color.

https://www.amazon.com/3M-08682-Single-Step-Primer/dp/B00473W5V8


Last edited by DUSTER_340; 04/05/21 10:30 AM.
Re: Windshield sealing [Re: Andrewh] #2906840
04/05/21 11:33 AM
04/05/21 11:33 AM
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Central Florida
larrymopar360 Offline OP
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Great info and I really appreciate the part numbers with it. Now I have to figure out how to tell the glass company basically how to do it without hurting feelings. I cannot do it all by myself I need their help and tools so I will just nicely suggest or ask “how about…“. I believe it to be a good and reputable company but as someone already said they probably haven’t done enough of these despite being around for 40 years and advertising “specializing” in vintage cars. I’m going to try to do all the prep myself to save them the labor.


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Re: Windshield sealing [Re: larrymopar360] #2906848
04/05/21 11:48 AM
04/05/21 11:48 AM
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larrymopar360 Offline OP
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I just called back to schedule an appointment to have them try again. I asked if I “might suggest a couple of products to their experts”. I sort of got double talked the lady that answered phone. She said they have butyl and primer from Dow they use. Sort of blew me off but we’ll see when they show up. I plan on having the stuff on hand when they show up. It’s not that expensive so I’d rather just have it here. They have one of those electric caulk guns? Is that what they’re called? Do they use the regular tubes or a special tube?


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Re: Windshield sealing [Re: larrymopar360] #2906864
04/05/21 01:01 PM
04/05/21 01:01 PM
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larrymopar360 Offline OP
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Also, best way to remove windshield installed two weeks ago? Razor around the outside I guess and gently push from inside? Here’s a pic of upper right corner.

C3BEB23F-553B-453D-985F-D947B9153464.jpeg
Last edited by larrymopar360; 04/06/21 02:53 PM.

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Re: Windshield sealing [Re: larrymopar360] #2906865
04/05/21 01:04 PM
04/05/21 01:04 PM
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larrymopar360 Offline OP
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Upper left also pic got turned to left frown

Luckily weather has been dry for several days so truck has been parked outside under oak tree drying out. In shade but birds pooping all over it.

71CB8EF8-D6B5-4D3A-B823-03168AAD4D36.jpeg

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Re: Windshield sealing [Re: larrymopar360] #2906944
04/05/21 05:28 PM
04/05/21 05:28 PM
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Bradenton, Fl 34203
Kilroy was here Offline
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Thank you, challengersteve. One reason Moparts is a great place.

Last edited by Kilroy was here; 04/05/21 05:29 PM.
Re: Windshield sealing [Re: Kilroy was here] #2907338
04/06/21 02:54 PM
04/06/21 02:54 PM
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larrymopar360 Offline OP
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Originally Posted by Kilroy was here
Thank you, challengersteve. One reason Moparts is a great place.
Definitely! Huge help. When glass company comes back I'm going to be super informed customer!


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Re: Windshield sealing [Re: larrymopar360] #2911580
04/18/21 11:42 AM
04/18/21 11:42 AM
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larrymopar360 Offline OP
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I began pulling out the brand new seal yesterday. It's actually coming out easier than I expected. First I just pulled out the lock strip, which came out very easily and in one or two pieces. Then I took a razor blade and cut all along the glass at an angle and pushing down hard, and was able to pull away the strip that was against the glass. The portion against the body then pulled up fairly easily, leaving behind some sealant that's still pliable and I could kind of roll it up into a ball with my fingers. It's been a few weeks so I was surprised it would still roll up like that.

Anyway, I started to wonder this; The channel for the glass on the body of my truck looks the same (basically) as the channel on my '89 Diplomat that takes no rubber seal. It just uses sealant, and the glass goes right to the sealant and dries, then molding covers that. Can I just skip the gasket/seal on the truck, and do just like the cars with no gasket seal? Granted, might look a little weird without molding covering, but I could come up with something to cover it, and maybe this would be much simpler and better?


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Re: Windshield sealing [Re: larrymopar360] #2912082
04/19/21 07:45 PM
04/19/21 07:45 PM
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Freeport IL USA
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Most glass designed to be used with a rubber gasket are smaller then the opening in the sheet metal pinch weld, or the same size as the opening, to allow the gasket to fit.
The glass that is bonded to the sheet metal overlaps the sheet metal by about a 1/2" all the way around.

I've done several older vehicles that I've had the glass installed bonded (with urethane) against the pinch welds, in every case, the glass had to be cut larger then if it was installed on the rubber gasket. That requires a template to be made for the glass company to cut the glass correctly, then its cut to your template and is your problem if its wrong.

Sealing the glass with the rubber gaskets is a pain in the butt, you need to seal to both sides of the metal and both sides of the glass. I can count on one hand how many pieces of glass I have had sealed the first time with a rubber gasket, I expect to have to have it done twice before its sealed. On the other hand, the bonded glass so far has been 100% sealed the first time.

The problem is, curved glass pretty much needs to be set the same way it was originally designed, its pretty hard to get curved glass cut oversized. The only option to bond in a curved glass that was designed and cut to be set with a gasket is to weld an extension to the pinch weld, and that is not an easy task either. Gene

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