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Need some opinions from forum's tech guys. Currently, I put on a thin layer of Dielectric Grease on all my weather striping each spring. GM recommends using their brand of fluid #3634770 (Amazon $58.73) for weatherstripping. Not sure of the chemical make up of the GM fluid. Your thoughts are appreciated on what you use and is their a GM fluid like substitute. Thank you.
Comes in 4 and 8 oz. tubes...the difference in dielectric grease and sil- glyde is that dielectric grease has a compound that is more for conductivity and Sil-glyde is for protection of rubber products...you do not need dielectric grease...
I have used this great stuff for years...its not expensive at NAPA...
I go with 303 Protectant myself. Use it on all rubber, plastic, seats, etc. Great product!
Used to be mail order only, but now you can get it almost anywhere.
I use "AC Delco Dielectric Silicone Grease" which is the GM recommended lubricant. It is really expensive if purchased through the dealership, however, I purchased it on Amazon for $18.59. While it's still expensive compared with other alternatives listed in this thread, I was fine with it.
I use "AC Delco Dielectric Silicone Grease" which is the GM recommended lubricant. It is really expensive if purchased through the dealership, however, I purchased it on Amazon for $18.59. While it's still expensive compared with other alternatives listed in this thread, I was fine with it.
Sil-Glyde is $13.00 for 8 oz....$6.50 for 4 oz....just checked at my NAPA store...
I tried (this week) Do It Best Hardware "Do it Plumbers Faucet And Valve Grease" - 050035. It is silicone based, and specifically talks about keeping O rings pliable, as well as waterproof. It is far less cost than the GM stuff (that did not work at all for me) at $3 or less for a 1 oz. tube.
I estimate that the tube would do 2 treatments of all door and hatch weather stripping on a coupe. And (in a tube) far easier to use than the 33 Aerospace spray.
So- the jury is still out. But after a couple days it seems quieter.
Last edited by MikeWyatt; Aug 14, 2017 at 07:58 PM.
I use "AC Delco Dielectric Silicone Grease" which is the GM recommended lubricant. * * *
I'm neither a designer, engineer, chemist, nor manufacturer of automobiles. I just drive them, by necessity and for pleasure.
Consequently, I rely on the product these people recommend I use to for the best care of my very expensive vehicle.
I would not use an alternate weight engine oil, oil filter, gasoline octane, or inflate the tires to other than the recommended air weight, so I see no reason to deviate from any other recommended product. Yes, I'm fully aware of a built-in product bias.
Weather Strip Lubercant
Does it work good on the weatherstripping blew? 
