Weatherstrip Lubricant

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Weatherstripping on C8, which is recommended to be lubricated once per year.
In the owner's manual which I have, it states "weatherstrip lubricant", to which no part numbers are provided.
Others sources like Conti state to use AC Delco Grease #1277900.
Some people use Dielectric Grease while others argue to use an emulsion product.
 
I think we finally stumped Raccoon! lol
It's interesting, because GM in the owner's manual recommends it annually. I've had other GM coupes / T Roofs, etc. in the past... this is something often overlooked until the seals start making noises, squeaky, leaking, etc.
 
DavidC said:
I think we finally stumped Raccoon! lol
It's interesting, because GM in the owner's manual recommends it annually. I've had other GM coupes / T Roofs, etc. in the past... this is something often overlooked until the seals start making noises, squeaky, leaking, etc.
Click to expand...
David, ask me when you need help. Here's what your looking for:
Dielectric Lubricant
AC Delco
10-4071
Part # is 12377900
 
NO! NO! To dielectric grease. Bad for rubber. And sticky as hell. Why would anyone rub grease on, only to get it transfered onto your clothes, and attract dirt? GM recommendation is bogus.

GM makes a specific weatherstrip emulsion. Get it from your local chevy dealer. That is the ONLY thing you use.

10953014 replaces 992877

It has existed for some 40+ years. Used it since 1979.

Pull out the applicator, and cap bottle with another lid. Applicator rusts in the emulsion, and a bottle will last a decade. If it dries out, re-emulsify with water. Ditto if you want to thin it out.

You will thank me.
 
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Way back when (1990's), the GM mechanic doing the oil changes would put a GM product on the weatherstripping after every oil change. It was a GM product. Asked him what it was and he said go to the pharmacy and buy glycerin. That is what I use twice a year on my daily drivers and once a year on the Vette.
Dab a little on a rag and wipe the stripping.
 
LE BARON said:
Way back when (1990's), the GM mechanic doing the oil changes would put a GM product on the weatherstripping after every oil change. It was a GM product. Asked him what it was and he said go to the pharmacy and buy glycerin. That is what I use twice a year on my daily drivers and once a year on the Vette.
Dab a little on a rag and wipe the stripping.
Click to expand...
It's a sugar alcohol. Not sure I'd want any kind of alcohol on my rubber.

Glycerin can be good for rubber in some cases, but it can also have negative effects:


  • Softening: Glycerin can make rubber softer and cause it to swell, which can decrease its tensile strength.


  • Brittleness: In extreme cases, glycerin can make rubber brittle and cause it to crack.


  • Stickiness: Glycerin can make rubber tacky or sticky.


  • Discoloration: Glycerin can cause rubber to discolor over time.


  • Corrosion: Glycerin's acidity can corrode rubber, which can increase its permeability and shorten its lifespan.


  • Prevention of freezing: Glycerin can prevent rubber seals from freezing in cold weather. To do this, you can rub a few drops of glycerin into clean, dry rubber seals.


  • Accelerating vulcanization: Glycerin can accelerate the vulcanization reaction of rubber, which can increase the number of rubber products produced per hour.


  • Renourishing: Glycerin can help to rehydrate older rubber stamps that are starting to dry out.

Glycerin is derived from vegetable oils or animal fats. It's commonly used as a plasticizing agent to increase the flexibility of films.
 
Murray20c8 said:
It's a sugar alcohol. Not sure I'd want any kind of alcohol on my rubber.

Glycerin can be good for rubber in some cases, but it can also have negative effects:


  • Softening: Glycerin can make rubber softer and cause it to swell, which can decrease its tensile strength.


  • Brittleness: In extreme cases, glycerin can make rubber brittle and cause it to crack.


  • Stickiness: Glycerin can make rubber tacky or sticky.


  • Discoloration: Glycerin can cause rubber to discolor over time.


  • Corrosion: Glycerin's acidity can corrode rubber, which can increase its permeability and shorten its lifespan.


  • Prevention of freezing: Glycerin can prevent rubber seals from freezing in cold weather. To do this, you can rub a few drops of glycerin into clean, dry rubber seals.


  • Accelerating vulcanization: Glycerin can accelerate the vulcanization reaction of rubber, which can increase the number of rubber products produced per hour.


  • Renourishing: Glycerin can help to rehydrate older rubber stamps that are starting to dry out.
Glycerin is derived from vegetable oils or animal fats. It's commonly used as a plasticizing agent to increase the flexibility of films.
Click to expand...
Looks like it is both good and bad Murray
 
DavidC said:
Weatherstripping on C8, which is recommended to be lubricated once per year.
In the owner's manual which I have, it states "weatherstrip lubricant", to which no part numbers are provided.
Others sources like Conti state to use AC Delco Grease #1277900.
Some people use Dielectric Grease while others argue to use an emulsion product.
Click to expand...
I've used Armor All on all of our vehicles' weatherstripping (and all rubber, vinyl, leather & plastic) for many decades, including my C3, C5 and now C7. Once a year application and it works well.
 
rfh928 said:
I've used Armor All on all of our vehicles' weatherstripping (and all rubber, vinyl, leather & plastic) for many decades, including my C3, C5 and now C7. Once a year application and it works well.
Click to expand...
I thought about that. The only issue with that is once used it must be used continually or the rubber discolors and can dry out. But it's cheap and plentiful.
 
AxeZ06 said:
It's my go to also. For 50+ years.
Recommended.
They use it in the assembly plants, on numerous rubber parts.
Click to expand...
Probably because of this.

Accelerating vulcanization: Glycerin can accelerate the vulcanization reaction of rubber, which can increase the number of rubber products produced per hour.
 
Murray20c8 said:
Probably because of this.

Accelerating vulcanization: Glycerin can accelerate the vulcanization reaction of rubber, which can increase the number of rubber products produced per hour.
Click to expand...
1732737866577.png
 
Murray20c8 said:
Probably because of this.

Accelerating vulcanization: Glycerin can accelerate the vulcanization reaction of rubber, which can increase the number of rubber products produced per hour.
Click to expand...
Usually used (on the assembly line) to lube rubber gromets / plugs that are not easily pressed into small holes (by hand).
Everyone took a jar of it home, to lube weather stripping.
 
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