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GM 12378521 ACDelco 10-2010 Engine Sealant

12378521 - 10C
AC-Delco Heavy Duty RTV Engine Sealer
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Sale: $16.10
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GM 12378521 Vulcanizing RTV Engine Sealer ACDelco 10-2010

This is genuine GM AC-Delco Engine Sealant. This sealant is 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

5.3 oz (half caulking tube)

Surface needs to be clean and free of any residue or oils before application of sealer.



Shipping Information

  • Item Requires Shipping
  • 2.0 lbs.
  • W6.0000” x H4.0000” x L6.0000”

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