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Old 06-17-2021, 10:26 AM   #1
Onecess


 
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Location: Lake Worth, FL
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Windshield leak- eek!

We were in a torrential rain a few weeks ago. When we went to leave I had all kinds of electrical gremlins that worried me but then fixed themselves in an hour. Not a promising event. So, last weekend we had another huge downpour and found water dripping on the dash, coming from the top windshield seal. I have seen posts where people say silicone fixed theirs, only removing and reseating windshield works, statements that the original gasket is almost always re-used, some who had the windshield removed and it leaked after.
Holy cow. My son, a mechanic, knows a windshield guy they use. He asked, and the guy said remove it and new seal. I am probably going to use Permatex flowable silicone windshield sealant. I figure it costs almost nothing and can always be cleaned off if they put a new seal on later. I hear Monaco used sealant only on the bottom and went to fully caulked in later models because of leaks being common. I park in covered storage, so it won't matter much if I have to reseal more than once.
Does anyone know what they used on later models?
Any advise? What did you do to stop your leak?
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Old 06-17-2021, 12:42 PM   #2
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Good luck with your project. Our windshield was leaking also, check out the thread on Dash Was Slow. Evidently ours had been leaking unnoticed by the previous owner. Over time the leak completely destroyed the firewall dash cap. Insurance has declined to replace the seal claiming it is a wear item. If yours has been leaking unnoticed there will be water damage under the dash cap that is not readily seen. Hope yours is in better shape than ours was. You might consider checking all the areas under the dash. God bless and happy Rving.
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Old 06-17-2021, 12:45 PM   #3
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Oh crud. Yeah, I saw your posts. I will check for rot when I go out there this weekend. Praying!
And I have to say, your dash panels are a work of art. I can do the under dash piece, but no way I could make those dash pieces!
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Old 06-18-2021, 06:39 AM   #4
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Mine leaked as well in heavy rains. I called one of the large rv window installers. I was told Don't use off the shelf silicon sealer. It will eventually fail and peel off.

They only use the best sealants and recommended only Sikaflex 295uv. It's the best marine window sealant, with UV protection.

https://www.amazon.com/Sikaflex-295-...4019437&sr=8-3

I used masking tape about 3/8-12" all around the front windshield. Applied the black Sikaflex in a bead. Removed the tape immediately after applying the Sikaflex. Came out perfect, never to leak again.
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Old 06-18-2021, 07:52 AM   #5
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I know off the shelf silicone expands and contracts too much. I used Permatex flowing windshield. I've always used and been happy with Permatex products, so I thought it was worth a shot. Did it yesterday.
The tubes are 1.5 oz. I found a lot of 12 on Amazon for under $3 a tube. I used 8 tubes. I will have no trouble testing it, as torrential rains are common in SO FL.
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Old 06-19-2021, 08:28 PM   #6
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So, my son, who actually did the work, just told me every clearance light leans is broken. So, that must be it. We thought the water was coming from the windshield gasket, but the headliner edge is right there. I had checked inside the cabinets for dampness, but they were dry, it must have run over them. So, that's a relief. I asked him if I should buy a rubber drip rail and he said, "Oh yeah, I forgot to tell you the clearance lights are broken," Sigh.
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Old 06-20-2021, 04:35 PM   #7
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I was just going to post to check the clearance lights. They are the first thing i check when it looks like a windshield leak.
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Old 06-20-2021, 05:44 PM   #8
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clearance lenses

yep x2 on the clearance light lenses. Twice thought i had leak. Twice did a look around and found a cap missing off of light. Replaced lens and all's well. Put a little glue on the last to keep it from bouncing off. Better than playing with a windshield seal....
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Old 06-20-2021, 05:49 PM   #9
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I sealed all my clearance lights where the wires came thru and around the lens for the same reason.. Still Leaked in 5 places along the windshields.. Finally got the windshield broken and in need of replacements and new seal and glass and no more leaks. Less than a year later drivers side is broken again, big rock off a truck tire. Be replaced in Tucson again this winter.
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Old 06-20-2021, 06:04 PM   #10
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Quote:
Originally Posted by Onrecess View Post
We were in a torrential rain a few weeks ago. When we went to leave I had all kinds of electrical gremlins that worried me but then fixed themselves in an hour. Not a promising event. So, last weekend we had another huge downpour and found water dripping on the dash, coming from the top windshield seal. I have seen posts where people say silicone fixed theirs, only removing and reseating windshield works, statements that the original gasket is almost always re-used, some who had the windshield removed and it leaked after.
Holy cow. My son, a mechanic, knows a windshield guy they use. He asked, and the guy said remove it and new seal. I am probably going to use Permatex flowable silicone windshield sealant. I figure it costs almost nothing and can always be cleaned off if they put a new seal on later. I hear Monaco used sealant only on the bottom and went to fully caulked in later models because of leaks being common. I park in covered storage, so it won't matter much if I have to reseal more than once.
Does anyone know what they used on later models?
Any advise? What did you do to stop your leak?

Windshields of any kind show never be sealed with silicone. Urethane is the only seal that should be used on windshields. That is what they are installed with new, and if replaced that is what is use, as the windshield is considered a structural component. Get a good glass man to look at it. If he can remove the outside molding and clean up the old leaking seal, he will reseal it with urethane. Most likely however, if the windshield itself has been leaking, the lip that it sits into will have corrosion under the old seal, and just pasting some more sealer just delays the inevitable.

The risk is always there when taking a windshield out that it can crack while removing. Check with your insurance company. Ask them if while doing a repair and it breaks, is that covered under your glass coverage.

As I read through the rest of this thread, many examples have been given about what happens if a windshield leak is not repaired promptly and correctly.

Do you want to pay a couple hundred now to have it done right? Or just goober it up so that 2-3 years down the road you are not also taking or replacing the windshield AND rebuilding the structure that has rotted out around it.
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Old 06-21-2021, 08:42 AM   #11
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The clearance lights were all broken. My son went to seal the windshield and told me it was dry inside the seal, and the seal was like new. I was surprised it was dry inside the seal. Then I said clearance lights are mentioned on here as common leaks, and he told me they were all broken and he forgot to tell me. LOL
After reading what HR2004 said, I think the best idea is to seal the holes under the clearance lights. You know 18 yr old clearance light gaskets are trouble waiting to happen.
I'll add that to the list, Thanks, all!
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