Can I JB Weld my exhaust?

JB Weld ExtremeHeat is perfect for making repairs on all manner of high-heat parts, including exhaust manifolds, mufflers, catalytic converters, exhaust pipes, engine blocks, fireplaces, smokers/fireboxes, and many more crack-prone items.
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Will J-B Weld hold up to exhaust heat?

How much heat can J-B Weld withstand? Original J-B Weld can withstand a constant temperature of 500º F. The maximum temperature threshold is approximately 600º F for a short term (10 minutes). Refer to individual product packages for more temperature information.
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Will J-B Weld catch fire?

well, theres a few things to keep in mind about jb weld... first, its an epoxy base, and epoxy is a thermoset plastic, meaning that it cures once, and does not melt down again very cooperatively, so if it gets too hot it would likely catch fire instead of melting away....
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How strong is J-B Weld for exhaust?

J-B WELD EXHAUSTWELD: A high strength fiberglass wrap, impregnated with a specially formulated resin for high temperature resistant repairs. ExhaustWeld can resist up to 1100°F once it is fully cured!
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Does J-B Weld melt?

J-B Weld can withstand a constant temperature of 500 °F (260 °C), and the maximum temperature threshold is approximately 600 °F (316 °C) for 10 minutes.
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Can You JB Weld Exhaust Leaks?



How long does J-B Weld high heat take to dry?

HighHeat™ Epoxy Putty - 2 oz

It cures to a tough, hard bond with little to no shrinkage. This industrial-strength product outperforms conventional epoxy putties at high temperatures and sets in 1 hour at room temperature. After 8 hours, it can be drilled, tapped, machined, ground, filed and painted.
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Can You Use Flex Seal on exhaust?

Some car owners are also wondering if they can use Flex Seal to fix leaks on their exhaust system. Manufacturers don't recommend using this product on car parts that are constantly subjected to high pressure and heat because it will affect its effectiveness, so it's best not to use it on your car exhaust.
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Can you fix an exhaust leak yourself?

If you discover your leak to be from a break or hole in your exhaust system it will be difficult to fix it on your own. You may be able to replace just the section of pipe or exhaust component by disconnecting the two closes joints and replacing the entire section of exhaust.
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Is J-B Weld permanent?

J-B Weld™ is The Original Cold Weld two-part epoxy system that provides strong, lasting repairs to metal and multiple surfaces. Mixed at a ratio of 1:1, it forms a permanent bond and can be shaped, tapped, filed, sanded and drilled after curing. At room temperature, J-B Weld™ sets in 4-6 hours to a dark grey color.
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Will J-B Weld hold under pressure?

The tensile lap shear is also an 'adhesion', but measured when pulling parallel to the surface (perpendicular to the bond). Since the latter is the lowest it means that this would be the maximum pressure the JB weld could withstand, but only if it is applied exactly perpendicular to the bond.
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Is JB Weld toxic when heated?

No. When fully cured, J-B Weld is non-toxic. However, we do not recommend consuming the product.
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How hot does exhaust pipe get?

A typical car exhaust pipe will reach temperatures of 400 to 500 degrees Fahrenheit. Some high-performance exhaust pipes can even get as hot as 1,000 degrees or higher. Your exhaust system is responsible for removing heat and noxious gases from your engine, which is the source of the heat.
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Can I fix my exhaust with duct tape?

Duct tape is not a safe option for repairing damaged exhaust mufflers or exhaust pipes. Duct tape is made of cotton mesh, covered with a type of plastic called polyethelyne, with a rubber-based adhesive underneath. When it gets hot, it melts and it is flammable.
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Can I use foil tape on exhaust?

Yes, you can, you can use it around your car exhaust manifold, or exhaust pipes. Flex seal is also a good option. Personally, I used aluminum foil tape which works well.
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What is the best sealant for leaking pipes?

The following list looks at the best pipe thread sealant for a number of applications.
  • BEST OVERALL: Gasoila – SS16 Soft-Set Pipe Thread Sealant with PTFE.
  • BEST BANG FOR THE BUCK: Dixon Valve TTB75 PTFE Industrial Sealant Tape.
  • BEST FOR WATER: Oatey 31230 Pipe Joint Compound with PTFE with Brush.
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