Genuine GM Fluid 12378521 RTV Engine Sealant – 5.3 oz. Cartridge

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Amazon Price: $20.99 (as of November 12, 2025 2:07 am – Details). Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on the Amazon site at the time of purchase will apply to the purchase of this product.
  • Brand: General Motors
  • Manufacturer: GM

Features

  • Original production sealant used in GM engine plants
  • Recommended for all engine applications
  • Compatible with all synthetic, synthetic blend, and minerals oils as well as coolants including DEX-COOL
  • Special precautions: Surface should be free of residual fluids and also of detergent residues
  • Special precautions: Joints should be closed within 20 minutes of application; final tightening should be done within one hour of application and closure

Manufacturer Info

  • PartNumber: 12378521
  • Model: 12378521

Product Info

  • ReleaseDate: 2013-02-20T00:00:01Z
  • Size: 5.3 Ounce

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