23070 Oakgrove Rd 100
NAPA Auto Parts NAPA Auto Parts Herndon
23070 Oakgrove Rd 100
Sterling,  VA  20166
(703) 707-0800
Reserve Online Participant
Store Hours
Mon-Fri:8:00 AM-7:00 PM
Sat:8:00 AM-5:00 PM
Sun:9:00 AM-4:00 PM
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Gasket Maker & Sealer JB Weld 3 oz Ultimate Black RTV silicone
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Gasket Maker & Sealer JB Weld 3 oz Ultimate Black RTV silicone

Part #: NCB 32329
Line: NAPA Consumer Brands
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Features & Benefits

Warranty: Standard : No Warranty, Expressed or Implied


JB Weld Ultimate Black gasket maker and sealant is an RTV (room temperature vulcanized) silicone gasketing material designed for use in mechanical assemblies where maximum petroleum and oil resistance is required.

  • Upon curing, which occurs when the product is exposed to the moisture in air, the silicone forms a tough, waterproof seal on most surfaces.
  • Cures to a black color.
  • Made in USA
  • 100% Silicone
  • Will not shrink or crack
  • Great for oil pans, valve covers, Transmission pans, timing gear covers


Brand NAPA
VMRS Code 053999097

Safety Information