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Old Feb 21, 2018 | 03:27 PM
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Default Weather strip question

My C5 weather strips especially top of the roof rear of Targa top is dry rotting. Can anyone recommend a weather strip revitalizer that put the moisture back into rubber seals to make

it last longer and protects it from environment?
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Old Feb 21, 2018 | 03:45 PM
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I was told to wipe the rubber with baby oil.
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Old Feb 21, 2018 | 04:11 PM
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Originally Posted by 1997 C5
My C5 weather strips especially top of the roof rear of Targa top is dry rotting. Can anyone recommend a weather strip revitalizer that put the moisture back into rubber seals to make

it last longer and protects it from environment?
Once that cast foam latex weatherstripping starts to break down and deteriorate about the only thing to do is replace it. I know it's expensive but there is no other choice ............IMO anyway .
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Old Feb 21, 2018 | 06:22 PM
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Default Weather strip

I use electrical dilation grease
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Old Feb 21, 2018 | 07:02 PM
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I used dielectric grease on all my weatherstripping. I used some generic stuff from an auto parts store, but I think it's basically the same stuff in the actual GM brand weatherstripping lube, dielectric grease.
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Old Feb 21, 2018 | 10:43 PM
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its not really expensive to replace and pretty easy to do as well
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Old Feb 21, 2018 | 10:46 PM
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Another vote on dielectric grease.
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Old Feb 21, 2018 | 11:12 PM
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Years ago I contacted a local body shop about what product they would recommend to keep the weatherstripping in good, pliable shape. They recommended some natural silicone lubricant. Bought a can of it and it works very well in treating the weatherstripping. Just another alternative to consider.
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Old Feb 22, 2018 | 12:25 PM
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Originally Posted by Vetteman Jack
Years ago I contacted a local body shop about what product they would recommend to keep the weatherstripping in good, pliable shape. They recommended some natural silicone lubricant. Bought a can of it and it works very well in treating the weatherstripping. Just another alternative to consider.

I also use electrical dilation grease every other year since I am not sure which one protects the best.
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Old Feb 22, 2018 | 05:23 PM
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Originally Posted by pewter99
its not really expensive to replace and pretty easy to do as well
The OEM weather strip to roof @ rear of Targa top is very expensive> I know you can get after market for around $160.00 but I don't know how well a/m weather strip is to oem far as fit
and sealing the targa top. I notice a/m weather strip has no sealant tape on like oem weather strip at certain spots. Have you replace one on your car?
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Old Feb 22, 2018 | 06:47 PM
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What is the procedure for using dielectric grease on the rubber seals? It seems like it would be very messy.
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Old Feb 22, 2018 | 06:51 PM
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Originally Posted by WetMountainMan
What is the procedure for using dielectric grease on the rubber seals? It seems like it would be very messy.
Wipe on, rub into W/S, wipe off excess


Last edited by SG Lou; Feb 22, 2018 at 06:53 PM.
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Old Feb 22, 2018 | 07:00 PM
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Originally Posted by 1997 C5
The OEM weather strip to roof @ rear of Targa top is very expensive> I know you can get after market for around $160.00 but I don't know how well a/m weather strip is to oem far as fit
and sealing the targa top. I notice a/m weather strip has no sealant tape on like oem weather strip at certain spots. Have you replace one on your car?
I paid some where in the neighborhood of $300 for a factory NOS-OEM B pillar W/S for mine. Got it off of eBay

From what i have read, most of those aftermarket W/S are joined together at the corners with 45 degree glue joints verses the OEM which is injection molded as one piece.

Last edited by SG Lou; Feb 22, 2018 at 07:02 PM.
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Old Feb 23, 2018 | 04:14 PM
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Silicone grease, like Syl Glide from NAPA.
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Old Feb 23, 2018 | 05:56 PM
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Weather stripping is expensive..
I have a convertible 98 c5 and the 6 little 8-10" pieces I need are over $600.00.. I think it's in the expensive ball park.. I am gonna have to do it soon tho, along with a new top..
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Old Feb 23, 2018 | 06:03 PM
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Originally Posted by WetMountainMan
What is the procedure for using dielectric grease on the rubber seals? It seems like it would be very messy.
It is messy. I used rubber gloves. Applied the grease to my fingers and then rub it onto the weatherstripping. Wiped off excess with a microfiber towel.
The next day I could see greasy areas on my door cards and other places it shouldn't be. But it cleaned up easy with isopropyl alcohol.
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