Orders may take longer than usual to process due to manufacturers having issues receiving and shipping parts. If you need to know if a part is in stock, please call prior to placing your order. We are doing everything within our control to ship orders as soon as possible.
A one component room temperature vulcanizing (RTV) sealant.
A high viscosity product that cures when exposed to air. The cured material has superior adhesion and elongation properties and is very resistant to engine oils and coolants. It is also oxygen sensor safe and will not corrode metal surfaces. This is the original production engine sealant used in GM plants.
This sealant is to be used on any application where a gap to be sealed is less than 1.0 mm (.04")
This sealant is compatible with all synthetic, synthetic blend, and mineral oils and coolants including DEX-COOL
The assembly may be filled with oil or coolant immediately after applying the sealant and torquing the bolts
The maximum working time for this sealant is 20 minutes
Sealant will fully cure in 24 hours
Oxygen sensor safe
GM production line sealer
Surface needs to be clean and free of any residue or oils before application of sealer.
We're currently collecting product reviews for this item. In the meantime, here are some company reviews from our past customers sharing their overall shopping experience.
GM (General Motors) - 12378521 - GM/AC Delco Vulcanizing RTV Engine Sealer - 5.3 Oz. (Half Caulking Tube) - GM Production Line Sealer
How would you rate this product?
It appears from your ratings that you may have an issue that needs attention. If you left a 1 or 2-Star rating by mistake, please correct it before continuing. Or, if your rating is correct, please leave us some feedback so that we can better serve you. Continue to feedback. No thanks. I would rather not participate in rating.
Write a short headline:
*Write a review about this product:
Only 50 characters left to turn your standard review into a featured review!
Please enter your contact information below:
Please don't put an email in the name field. address.
Please enter a valid email address.
Your email is safe. It will only be used for order confirmation and customer care.
Write the First Review!