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Gray 3 oz tube of high-temp silicone sealant

J-B Weld

J-B Weld 32327 High-Temp Silicone Sealant 3 oz Tube Gray

SKU CH-5EV3-Q81T2

High-temperature silicone sealant withstands up to 700 °F and cures in one hour for metal and rubber repairs

  • Withstands extreme heat up to 700 °F for exhaust repairs
  • Remains flexible from 32 °F to 100 °F in all seasons
  • Cures fully in one hour for quick project turnaround
  • Bonds metal and rubber reliably for versatile automotive use
  • Meets DSL and TSCA standards for regulatory compliance

High-temp silicone for metal and rubber repairs

J-B Weld 32327 is a gray silicone sealant that resists temperatures up to 700 degrees F. It bonds metal and rubber surfaces in automotive and industrial maintenance tasks. The tube holds 3 oz of material for targeted application.

Cures in one hour between 40 and 100 degrees F

Full cure and working time are both one hour when applied within the stated temperature window. The sealant remains flexible from 32 to 700 degrees F after curing. DSL and TSCA compliance confirms regulatory suitability for professional use.

Nozzle tube enables direct placement without extra

The 3 oz tube dispenses sealant straight onto joints or gaps, reducing waste on small repairs. Gray colour matches common engine and exhaust components for a cleaner finish. No separate caulk gun or mixing equipment is required.

Highlights

  • Withstands extreme heat up to 700 °F for exhaust repairs
  • Remains flexible from 32 °F to 100 °F in all seasons
  • Cures fully in one hour for quick project turnaround
  • Bonds metal and rubber reliably for versatile automotive use
  • Meets DSL and TSCA standards for regulatory compliance

Specifications

BrandJ-B WELD

Questions about this item

How do I apply the 3 oz tube of gray silicone sealant, and what temperature mistake should I avoid?

Apply between 40 and 100 °F; surfaces must be clean and dry. The common error is applying outside this range, which prevents proper curing.

What maintenance or replacement will the cured sealant need later?

Once fully cured in 1 hour, the high‑temperature silicone forms a permanent bond rated to 700 °F. No scheduled maintenance or replacement is required under normal conditions.

What is the first limit reached under sustained high‑heat use?

The sealant is rated for continuous exposure up to 700 °F. Exceeding this temperature is the primary limit that will cause degradation.

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