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Old 07-29-2021, 02:59 PM   #1
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Windshield DIY

We just bought a 2002 HR Admiral which has a large crack in the drivers side windshield. I'm looking at replacing the windshield and seal myself and would appreciate advice from others who have done theirs.

I have done a number of cars in the past with rubber seals and also the glue-in kind.
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Old 07-29-2021, 03:39 PM   #2
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Experience helps.
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Old 07-30-2021, 09:33 AM   #3
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I have seen links to vids Google/utube shared . I would suggest a painters scaffold. Good luck with your project.
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Old 07-31-2021, 07:03 AM   #4
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Better have two friends to help you and the correct equipment. I watched our windshield get replaced twice and it is not simple task. Also it you break it, will you have saved any money?
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Old 07-31-2021, 10:27 AM   #5
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Scaffolding is a really good idea, maybe backing a pickup to it and stand on the tailgate. We watched them install a coach windshield and they used suction cup handles. They were very big and had hand pumps on them to create the vacuum. Extra people is a good idea as the glass is heavy.
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Old 07-31-2021, 10:37 AM   #6
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If it still has the original rubber seal, I would change it. They seem to shrink and also wear over time, so it won't be as tight a fit as you may need to keep the rain out.

But it is really a "wind" shield, not a "rain" shield!

We had rolls of butel that we put in the channel to help seal the windshields on Peterbilts before the days of "glue in".
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Old 08-02-2021, 08:50 AM   #7
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Yes I plan to replace the seal for sure. 20 yrs. old...

I guess my main question is where to use poly caulk. When doing rubber seal type windshields in the past I never used caulk.

I have read that the seal should be caulked to the RV & the glass float in the seal, but I have also seen people put caulk between the glass and the seal from outside.
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Old 08-02-2021, 10:34 AM   #8
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Yes I plan to replace the seal for sure. 20 yrs. old...

I guess my main question is where to use poly caulk. When doing rubber seal type windshields in the past I never used caulk.

I have read that the seal should be caulked to the RV & the glass float in the seal, but I have also seen people put caulk between the glass and the seal from outside.
The butyl strip goes in the groove that goes against the frame. It is the most likely area that needs sealing.

If you want an extra bit of peace of mind, you can put some on the winshield side, but with a new rubber, it should not be needed.
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Old 08-02-2021, 12:05 PM   #9
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When I put in rubber windshield gaskets that previously had some sealer on them, I use 3M "Bedding and Glazing compound". It's the correct stuff to use on stuff like 1960's pony cars when they stull had rubber gaskets. If you try to install a windshield without the extra sealer on a 1968 back Mustang, you're going to have wet feet. Period.
On the flip side, if it was originally installed without any additional sealer then it shouldn't need it now. An example being that back glass in like every domestic pickup truck (and many foreign) built until the late 1990's. No extra sealer on any of them ever and leaks were very rare.
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Old 08-03-2021, 08:36 AM   #10
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I just got a quote from RV Glass Parts for $920 with crate & shipping.

She told me the seals are typically left in & that they are "lifetime". I would normally say no but if it's also getting caulked maybe that's the case. This rig has spent it's life inside, then under a carport so the rubber actually looks fine.
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Old 08-03-2021, 11:46 AM   #11
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Might be something to that. I was going to put a new windshield in my 1981 Rabbit truck. I figured a new rubber gasket too but people on forums said the new reproduction ones were terrible. So I reused the old one. By the date code on the glass it was all original. Some two years later it's still sealed just fine. The only time it's been inside was for repairs. So at least one 40 year old windshield gasket seems to be doing fine after being reused. (No sealer)
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Old 08-04-2021, 09:36 AM   #12
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Nice, I had a Rabbit pickup (Caddy)! It was built, redlined at 8,000 RPM. Fun truck.
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Old 08-04-2021, 03:30 PM   #13
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If you have glue on both sides , glass to rubber, rubber to frame , you will crack the windshield in most coaches.
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Old 08-04-2021, 04:13 PM   #14
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If you have glue on both sides , glass to rubber, rubber to frame , you will crack the windshield in most coaches.
It's not a solid glue. Butyl is flexible, and remains so. It's more of a sealent than an adhesive, so the windshield can move to some extent.
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