For more than 40 years, our products have earned a loyal and enthusiastic following from the people who take pride in their work. They know our products bond strong to a variety of surfaces in even the toughest environments. And they have always been made in the USA.
The J-B Weld Company was founded in 1969 by Sam and Mary Bonham. Sam had discovered a need for a “cold weld” product to use in his truck service garage, instead of traditional torch welding. Working with a Texas A&M chemist, he formulated an original “tougher than steel” two-part epoxy and named it J-B Weld. Sam and Mary soon went from selling the product out of their car to auto parts jobbers across Texas, to selling it in stores throughout the U.S. and internationally.
Our goal of helping customers save their items and them money can be found in the original company motto:
The latest chapter of the J-B Weld story began in 2008, when the company was purchased by a group of private investors led by Chip Hanson, who now serves as CEO and president. In just a few years’ time, we have broadened the product line to meet the changing needs of our customers, including new adhesives for metal, wood, plastic, and general purpose use. With each new product we innovate—whether epoxy putty sticks, syringe-based epoxy adhesives, threadlockers, or specialty products—we continue to provide the world’s strongest bond for your repair projects. We have also expanded our retail partnerships to reach even more customers.
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.
Will J-B Weld work on an automotive exhaust?
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. However, in areas where the continuous temperature is less than 450º F, we do recommend our HighHeat epoxy putty stick.
How can I remove J-B Weld after it is fully cured?
When fully cured, J-B Weld can only be removed by grinding or filing it off, or by directly heating the product above the 600º maximum temperature threshold.
Is J-B Weld toxic?
No. When fully cured, J-B Weld is non-toxic. However, we do not recommend consuming the product.
What can I use as a surface cleaner before using J-B Weld?
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 “cleaner” that will leave a petroleum residue.
Is J-B Weld resistant to water and/or gasoline?
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, try our SteelStik or WaterWeld.
Will J-B Weld hold up to extremely cold temperatures?
Original J-B Weld has proven to maintain its characteristics to temperatures as low as -67º F.
Will J-B Weld conduct electricity?
No. J-B Weld is not considered to be a conductor. It is an insulator.
What is the difference between J-B Weld and KwikWeld?
KwikWeld is a great alternative to original J-B Weld when you need a quick-setting epoxy. It sets in 4 minutes and cures in 4-6 hours, while J-B Weld sets in 4-6 hours and cures in 15-24 hours. Because it is faster setting, KwikWeld has about two-thirds the strength of J-B Weld; however, they are both strong enough for most projects and repairs.
Is there anything that J-B Weld WON’T bond to?
J-B Weld will not adhere or bond well to:
- Any flexible rubber surface
- Polypropylene plastic
- Polyethylene plastic
Can I thin J-B Weld to make it easier to pour?
Yes. Add up to one teaspoon of acetone or lacquer thinner per two ounces (one full package) of mixed product.
Is J-B Weld microwave safe?
Yes, it is microwave safe.