Don't Scrap It, JB Weld It!


Duct Tape in a Tube

Duct Tape in a Tube

Click the image for a review by Yesterdays Tractor on JB Weld for the tractor restorer - some good information on where and when to use JB Weld when...


Hi have just purchased JB WELD, I will be trying it on my boat motor repair, If this works it will be saving me $2000 dollars in repair cost. Ill get...

Plastic Weld

Thought I should let you know just how well PlasticWeld performed on our Miele Microwave Oven. It has two plastic clips that secure the door when...

Very Satisfied Customer

Thank you for your advice, I did purchase and use the JB Weld. This product was very easy to use, I did not turn the refrigerator off and it set...

Original and the best!

Have been a long time user of JB Weld when I worked as a plant mechanic and engine rebuilder - still has a permanent place in my workshop. It is...

Frequently Asked Questions: JB Weld and JB Kwik FAQ

Q: How much heat can J-B Weld withstand?
A: J-B Weld can withstand a constant temperature of 500F (260C). The maximum temperature threshold is approximately 600F (315C) for a short time (~10 minutes).

Q: Will J-B Weld work on an automotive exhaust?
A: Because of the extreme temperatures of exhaust systems, we do not recommend J-B Weld for use on exhaust manifolds and catalytic converters. Nor do we recommend the product for repairs within the combustion chamber.

Q: How can I remove J-B Weld after it is fully cured?
A: When fully cured, J-B Weld can only be removed by grinding or filing it off, or by directly heating the product above the 600F maximum temperature threshold.

Q: Is J-B Weld available in larger sizes?
A: J-B Weld and J-B Kwik are both available in the standard 2 oz (55 gram) pack or a larger 10 oz (280 gram) pack suitable for larger workshops. The 10oz Professional pack size consists of 5 ounces of resin and 5 ounces of hardener for a total of 10 oz. of usable product.

Q: Is J-B Weld toxic?
A: No. J-B Weld is non-toxic. However, we do not recommend consuming the product.

Q: What can I use as a surface cleaner before using J-B Weld?
A: We recommend using acetone or lacquer thinner. In the absence of these two, soap and water can be used. Just be sure that the surface is completely dry before applying J-B Weld. DO NOT use alcohol, or any other "cleaner" that will leave a petroleum residue.

Q: Is J-B Weld resistant to water and/or gasoline?
A: When fully cured, J-B Weld is completely resistant to water, gasoline, and about every other petroleum product or automotive chemical. For wet-surface or submerged water or gasoline repairs, we recommend either J-B Stik or J-B WaterWeld.

Q: Will J-B Weld hold up to extremely cold temperatures?
A: J-B Weld has proven to maintain its characteristics to temperatures as low as -67F (-55C).

Q: Will J-B Weld conduct electricity?
A: No. J-B Weld is not considered to be a conductor. It is an insulator.

Q: What is the tensile strength of J-B Weld and J-B Kwik?
A: J-B Weld has a tensile strength of 3,960 psi. J-B Kwik has a tensile strength of 2,424 psi. For more physical properties information, please see the technical datasheets on each product (listings on each are in this category).

Q: What is the difference between J-B Weld and J-B Kwik?
A: The simple answer is that J-B Kwik is about half as strong as J-B Weld in both strength and heat resistance. The other differences are somewhat obvious by the name. J-B Kwik sets in 4 minutes and cures in 4-6 hours, whereas J-B Weld sets in 4-6 hours and cures in 15-24 hours.

Q: Is there anything that J-B Weld WON'T bond to?
A: J-B Weld will not adhere to, or bond well to: any flexible rubber surface, leather, vinyl, canvas, polypropylene plastic or polyethylene plastic

Q: What color is J-B Weld when it cures? Is it clear?
A: J-B Weld cures to a very dark gray (steel-like) color.

Q: Do you make a J-B Weld specific for aluminum or stainless steel?
A: J-B Weld works great on ANY metal surface (lead is an exception). Use as directed on package and J-B Weld will get the job done.

Q: Can I thin J-B Weld to make it pour easier?
A: Yes. Add up to 1 teaspoon of acetone or lacquer thinner per 2 oz. (1 full package) of mixed product.

Q: Is J-B Weld microwave safe?
A: Yes.

This product was added to our catalog on Wednesday 11 January, 2012.


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