My door weatherstrips are showing their age, and I was looking for new ones on TFS, and of course they're discontinued by GM and they only have a few left, and passenger side only at that.

I've heard of weatherstrip restoring chemicals before, but suspected that they were just snake oil. I did some research and found out about a product called Gummi Pflege Stift, and read nothing but good reviews on its rejuvenating properties on seals and weatherstrips.

A lot of folks in the Chrysler Sebring Convertible forum recommend this stuff, but I've never used it.

I have a pair of door weatherstrips from a low mile 86 GT (69k) up for sale. PM if interested.

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Project L67 Fiero

I've used it on a 98 bmw 528 to eliminate the whistling sound caused by the rubber contacting the window. I've also used it on my fiero door seals and trunk seals. Very good stuff, but a little pricey.

I prefer the spray ("tiefenpfleger") but Einszett makes an excellent product. I used Wurth's Rubber Care for many years but gave 1Z a try and haven't gone back. I use it on all my cars' rubber seals a few times a year and they continue to stay nice.

I use it. Excellent results.

I use Gummi Pflege on my E46 M3. Good stuff. Doesn't last forever though. If you are trying to get rid of squeaks you need GM 3634770. VERY pricy but lasts a long time (years, or forever). It's a DuPont Krytox formulation. It lengthens the life of the seals too.
http://www.ikvlubricants.co...k%20and%20Rattle.pdf