Name: ExtremeHeat
Brand: J-B Weld
SKU: 37901

Set Time

1 Hour

Cure Time

24 Hours

Cure Color

Dark Gray

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ExtremeHeat™ is formulated to allow for repairs to iron, steel and metal in high temperature environments (1000°F / 537°C). When fully cured, this metallic compound can be drilled, machined or sanded. It is great for repairing cracks, small gaps, seam connections or holes in exhaust manifolds, pipe connections, mufflers, catalytic converters, outdoor grills, fire boxes, gas and commercial furnaces and water heaters. This product is water based, non-flammable and contains no solvents or Volatile Organic Compounds (VOCs).

Great For

Exhaust Manifolds
Tail Pipes
Mufflers
Engine Blocks
Duct Work
Heat Exchange Units
Fire Box / Fire Place
Outdoor Grills

Use On

Automotive
Metal
And More

Get The Safety Data Sheet

For California residents only, check here for warning

Prepare

Mix

Apply

Dry

Prepare

Remove dirt, debris or loose contaminants from surface. Use sand paper to roughen. For some repairs, open small cracks further with a drill or screwdriver to create a 1/8" gap.

Mix

Open J-B Weld® Extreme Heat™. Thoroughly mix product.

Apply

Use product generously, working onto surface or into hole, crack, pit or seam. Repeat as needed. Allow 2-4 hours set up, depending on temperature and current environment.

Dry

Test cure by pressing fingernail or thumbnail into repair material. If unable to penetrate, then repair is complete. If area appears slightly soft, use a non-flame heat source, such as a hair dryer, to speed cure time, or allow 24 hours before allowing high heat exposure. Repeat test until fully cured.

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