How Long Will Jb Weld Last On Exhaust

How Long Will Jb Weld Last On Exhaust Repairing your car’s exhaust component often involves welding, especially due to rust or cracks. The process can be complex, but understanding the proper approach is key. Can you use JB Weld on your exhaust? Welding an exhaust pipe does present challenges, but with the right information, you can navigate this task successfully. In this guide, I’ll address whether JB Weld is suitable for exhaust pipes and provide essential insights for your repair process.

Is JB Weld an Effective Solution for Exhaust Pipes?

How Long Will Jb Weld Last On Exhaust
How Long Will Jb Weld Last On Exhaust

If you’re working within a budget, JB Weld can be employed to mend small holes in exhaust pipes or to address leaks, including leaky mufflers. For budget-conscious repairs, it can be a handy solution.

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Optimal Choice for Stopping Exhaust Leaks

How Long Will Jb Weld Last On Exhaust
How Long Will Jb Weld Last On Exhaust

For effective exhaust leak sealing, JB Weld’s “Extreme Heat” variant is highly recommended. This specialized product is designed to handle a variety of repairs, from pipes and mufflers to engine blocks and fireplaces. It excels in manifold repairs, sealing leaks in gaskets and seals. The dark hue of the adhesive appears within 4-6 hours at room temperature and fully recovers in 15-24 hours.

Related : How To Fix Exhaust Flange Leak

When to Exercise Caution with JB Weld

How Long Will Jb Weld Last On Exhaust
How Long Will Jb Weld Last On Exhaust

However, caution should be exercised when considering JB Weld for exhaust manifold repairs. Due to the high temperatures within exhaust systems—reaching up to 4500°F—standard JB Weld may not be suitable. For extreme temperatures, opting for a high-heat epoxy glue stick or the specialized JB Weld Extreme Heat variant is recommended to ensure the repair remains effective over time.

Welding Your Exhaust Pipe: The Right Tools

How Long Will Jb Weld Last On Exhaust
How Long Will Jb Weld Last On Exhaust

When it comes to welding your automotive exhaust pipe, the choice of tools and welding process is crucial. For exhaust pipes, typically made from materials like steel, aluminized steel tubing, or stainless steel, an MIG welder is a popular choice. MIG welding is advantageous due to its speed, ease of use, and minimal waste generation.

Stick welding, with similar principles to MIG welding, is another option that works well indoors and outdoors. Flux core welding and TIG welding are also alternatives, with each method having its own considerations and requirements.

Tips and Precautions for Sealing Exhaust Pipes

  • When dealing with manifold leaks, start the engine and inspect for smoke, which could indicate a crack in the manifold or other exhaust components.
  • Regularly monitor your vehicle’s dashboard for signs of a faulty exhaust system.
  • Unusual noises under the car might indicate a leak.
  • Prior to welding a cracked manifold, ensure thorough surface preparation for optimal results.
  • After driving, allow the exhaust system to cool down before attempting any repairs to avoid burns.

Read More : How To Fix Exhaust Leak At Flange


The exhaust tubing plays a crucial role in removing harmful fumes from the combustion chamber, making proper repairs essential. Leaks manifest as unusual exhaust noises or odors. While JB Weld can serve as a cost-effective option for certain exhaust repairs, it’s vital to choose the appropriate variant based on the heat exposure. Armed with this knowledge, you can make informed decisions about your exhaust repair needs.