How can you remove J-B Weld?

• Post By: Brandon M. Fox  • Updated: 03/07/21
• JB Weld

Looking for a quick fix to repair any household items or metals? Want an adhesive that is as strong as a weld? The J-B Weld can be your best bet.

J-B Weld is an epoxy adhesive that can join almost anything you name. but sometimes we need to undo or re-do the repair, right? (Learn more about J-B water weld not hardening).

Wondering how to remove J-B Weld? Then we have some techniques up our sleeves, let’s check them out.

jb weld remove

Is J-B Weld permanent?

Before answering this question, let’s talk about what J-B Weld is. 

JB welding is a two-part epoxy also known as a cold weld. It works at a ratio of 1:1 and forms a strong and long-lasting bond on metal and many other surfaces.

At room temperature, it takes 4-6 hours to cure the JB weld to a dark grey color. But to fully cure it, you have to wait 15-24 hours. 

JB welding forms a permanent bond if fully cured. After that, you can shape, file, sand, and even drill the JB weld. It has tensile strength up to 5020 and can stand temperatures as high as 550 degrees Fahrenheit.

Where can I use J-B Weld?

JB weld is a multipurpose cold-welding system. You can use it for metal surfaces as well as household items. Brick, concrete, metal, or fiberglass anything can be fixed with JB weld.

JB weld is great for:

  • Repairing household items.
  • Automobile parts.
  • Plumbing.
  • Marine parts.
  • Craft projects.

How to remove J-B Weld?

J-B Weld is a permanent system. But in case you need to remove it even after it has fully cured, you need to take some extra steps.

1. Heat application

Extreme heat is by far the most effective way to remove JB weld from any surface.

J-B Weld can resist heat up to 550 degrees Fahrenheit. So, you need to apply 600 degrees or more to make the JB weld melt.

And the most convenient way of doing so is to use a heat gun. You can also use a propane hand torch to get a similar result.

2. Mechanical forces

If the heat source is not available or applicable, then you can opt for mechanical forces.

Using a grinder, chisel or even sandpaper can help you remove the weld.

3. Removing J-B Weld using chemical solvent

Chemical solvents are another option to remove J-B Welds in some cases. Using vinegar to remove JB weld is a common practice.

Acetone is another great alternative as well. This will soften the weld and make the removal easier. Even a good quality nail polish remover can also work just as fine.

Tips on how to remove J-B Weld

Before attempting to remove the J-B Weld, there are a few things you need to consider:

  • Take note of the welded surface before choosing a weld removing technique.
  • In case of using chemicals, make sure the surface is acid-proof.
  • While using a chisel or grinder, use a respiratory mask.
  • Don’t perform two or more techniques at the same time for removing the J-B Weld.
  • Perform the J-B Weld removal processes in a well-ventilated area.

How to remove from hand?

The most common method of removing J-B Weld from your hand is to use a hand cleaner. Especially the ones mechanics use for themselves are more effective.

But in case you don’t have excess hand cleaner, try some acetone or lacquer thinner. Try to clean the weld before it fully cures.

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How to remove J-B Weld from car paint?

Wondering how to remove J-B Weld from car paint? Well, just use a small chisel to sand the weld. But be careful to keep the chisel flat and lifted from the surface.

Frequently Asked Questions (FAQs)

Q: How to remove from aluminum?

Ans: You can use either the heat or the grinder for removing the J-B Weld from aluminum.

Q: Is JB weld electrically conductive?

Ans: The answer is ‘No’. It works as an insulator.

Q: Is J-B Weld automobile chemical resistant?

Ans: fully cured J-B Weld can withstand any automobile chemical including- water, gasoline, or other petroleum-derived fuel.

Q: Can J-B Weld hold in extreme cold?

Ans: JB weld can hold up to -67 degrees Fahrenheit.

Q: Is J-B Weld microwave safe?

Ans: Yes, it is.

Q: Is J-B Weld toxic?

Ans: Fully cured weld is not toxic. 

Q: How to remove J-B Weld from skin?

Ans: You can use any hand cleaner or acetone for this.


J-B Weld is among the best adhesives to join materials. It is a permanent bond that is quite long-lasting and strong.

But in case you need to remove it or accidentally mess things up, then how to remove J-B Weld? Well, just follow our instructions. 

J-B Weld can come off using the right amount of heat. You can also use a grinder or any other sandpaper to remove it. 

In case it comes in contact with your skin, uses a hand cleaner or acetone rub to clean it. Make it hurry and don’t let it fully cure.

Related post

  1. Why JB Water Weld Not Hardening?
  2. Quick Guide: Where Does JB Weld Work On?
  3. What To Look For In Water Weld?
  4. Is JB weld food safe?
  5. How Long Does Jb Weld Take To Dry?
  6. Jb Weld Cure Time vs Temperature
  7. Will JB Weld Work On Plastic?
  8. Flex Seal Vs JB Weld

Brandon M. Fox

I have completed Diploma at Welding. I have spent 10+ years in Welding. Now love to write about welding and welding products and share my own experiences. Find me: Twitter | Facebook

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