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I just noticed that the rubber seal around the top and and sides of my windshield is deteriorating badly--it's just turning into a soft smeary mess that you can easily bury a fingernail in. It's not happening at all at the similar seal around the rear glass--it remains solid and firm. The car (2020 C2S with about 7,500 miles) is always hand washed by me with proper soap (car was ceramic coated from jumpstart) and no harsh chemicals. Anyone else experiencing this problem? I wonder if it has anything to do with the intense heat we've been experiencing here lately in Houston, although the car is always garaged and doesn't spend a lot of time baking in the sun. I'll be taking it to the dealer to check out--looks like the windshield will have to come out to replace it (groan).
Some of us here including myself had it replaced under warranty. It's a known issue. I asked SA if they know what causes it but they don't know. It's not heat - happens in all climates.
It’s not heat, or IR. It’s UV that is the enemy of many things on cars, including rubber seals. Lot depends on how much direct sunlight the car is exposed to. Normally, rubber seal degradation from UV, takes many years.
It’s not heat, or IR. It’s UV that is the enemy of many things on cars, including rubber seals. Lot depends on how much direct sunlight the car is exposed to. Normally, rubber seal degradation from UV, takes many years.
Nope, we have 1000's of cars in the sun all day and none show this general UV issue. Porsche either does not know or will not tell why just the windshield gasket becomes mush on some cars. My guess - a production batch of sealant was not formulated correct and just disintegrates over time now matter what, sun, IR, UV etc Happens to all manufacturers.
Nope, we have 1000's of cars in the sun all day and none show this general UV issue. Porsche either does not know or will not tell why just the windshield gasket becomes mush on some cars. My guess - a production batch of sealant was not formulated correct and just disintegrates over time now matter what, sun, IR, UV etc Happens to all manufacturers.
Yep.
Certainly, there are rubber and plastic parts on cars that are more impervious to degradation from UV…but it’s fact that UV does degrade rubber and plastic on cars.
It’s not heat, or IR. It’s UV that is the enemy of many things on cars, including rubber seals. Lot depends on how much direct sunlight the car is exposed to. Normally, rubber seal degradation from UV, takes many years.
My car spends very little time in the sun. It seems that this has happened very quickly, since I wash my car frequently and just noticed it. It's like a chemical reaction has occurred between the gasket and sealant, maybe exacerbated by the current intense UV here, that's destroying the gasket. I found this Rennlist thread that confirms it's a known issue never resolved by Porsche for years--that's a shame, I've never had this problem on any other high end car. We shouldn't have to additionally protect our rubber and plastic parts, at least during the initial years of ownership.
I'll probably need it to prove my warranty case with my hard headed dealer. I also just noticed a very small section of gasket at the rear glass where it's starting there too--oh joy!
My car spends very little time in the sun. It seems that this has happened very quickly, since I wash my car frequently and just noticed it. It's like a chemical reaction has occurred between the gasket and sealant, maybe exacerbated by the current intense UV here, that's destroying the gasket. I found this Rennlist thread that confirms it's a known issue never resolved by Porsche for years--that's a shame, I've never had this problem on any other high end car. We shouldn't have to additionally protect our rubber and plastic parts, at least during the initial years of ownership.
I'll probably need it to prove my warranty case with my hard headed dealer. I also just noticed a very small section of gasket at the rear glass where it's starting there too--oh joy!
Yes, there can be any number of reasons for the rubber seal degrading. UV is just one of them, and as I stated earlier, UV degradation usually takes several years to appear. …and if exposure to the sun was minimal, then likely this isn’t the issue. What does your local Porsche dealership say?
UV is one of the main reasons why I cover any of my cars that aren’t garaged.
Just have your dealer replace the windshield and be done. Dont matter what is causing it. Of your dealer gives you a hard time let us know and we send some dealer references that did replace it without asking much. It's a known defect.
So, here’s a question: If this is a known problem from Porsche, and apparently, never corrected?…what makes anybody confident that when/if the seal is replaced, it won’t be replaced with a seal that still has this problem?
Have newer cars had this issue, or, are they still too new to show signs of deterioration?
Same issue here and since I have the G Blue, these might as well be pictures for my car. The dealer ordered a replacement and should be installed late Aug. I found a solution for those who don’t want the windshield replaced or the dealer is giving them a hard time covering the replacement under warranty,
search the forum for “baking soda”. Knowing that baking soda solves the problems confirms what others have said here, it’s a seal formulation issue at the time of manufacturing. The seal is attached to the glass, so replacing the seal means replacing the entires windshield.
mine is a MY 2020 and had the same problem. Dealer replaced it but took two months to get the glass from Germany. SA said he had replaced around 8 or 9 wind shields at that time. Let's hope Porsche got the formula right the second time.
07-29-2022, 06:24 PM
Rubber Seal Deteriorating Around Windshield
