JB Weld Epoxy
Representative Photo, actual item may vary
JB Weld Epoxy: The Original Cold Weld, Built to Last
Few names carry as much weight in the repair world as JB Weld. Founded in 1969 by Sam Bonham in Sulphur Springs, Texas, the J-B Weld Company has specialized in epoxy products from day one — and decades later, that singular focus shows in every formula they produce. Whether you're sealing a cracked engine block, patching a fiberglass hull, or bonding dissimilar materials on a workbench, JB Weld's epoxy lineup offers a targeted solution for almost every scenario.
What Sets JB Weld Epoxy Apart
The secret to JB Weld's staying power is its engineering-first approach to two-part adhesive chemistry. JB Weld epoxy is a two-part adhesive that can bond various surfaces and withstand high temperatures up to 500°F (260°C) constantly and 600°F (316°C) for short periods. It is water-resistant, petroleum/chemical-resistant, acid-resistant, and resists shock, vibration, and temperature fluctuations — a combination of properties that makes it genuinely useful in demanding automotive and industrial environments.
JB Weld can be used to bond surfaces made from metal, porcelain, ceramic, glass, marble, PVC, ABS, concrete, fiberglass, wood, fabric, or paper — a versatility that few competing products can match. And once it's cured, JB Weld can be used as an adhesive, laminate, plug, filler, sealant, or electrical insulator, and when fully cured it can be drilled, formed, ground, tapped, machined, sanded, and painted.
Key Product Lines in the JB Weld Epoxy Family
- Original Cold Weld (Twin Tube): The flagship formula boasts a tensile strength of 5020 PSI and can withstand temperatures up to 550°F when fully cured. At room temperature it sets in 4–6 hours to a dark grey color, with a full cure reached in 15–24 hours.
- KwikWeld: When time is the constraint, KwikWeld steps in. KwikWeld is a two-part quick-setting steel-reinforced epoxy that bonds to metal, concrete, fiberglass, ceramic, wood, and more, with a 1:1 mixing ratio that sets in just 6 minutes and cures in 4–6 hours, achieving a strength of 4360 PSI.
- ClearWeld: While JB Weld Original epoxy dries to a dark grey color, ClearWeld dries clear and is often preferred when appearance is an important consideration — ideal for glass, ceramics, or transparent plastics where a visible repair line would be unacceptable.
- SteelStik Epoxy Putty: A hand-kneadable putty-style option for quick gap filling and repair. SteelStik cures to a dark grey color, is rated at a strength of 4000 PSI, and will withstand temperatures up to 350°F.
Choosing the Right JB Weld Epoxy
The breadth of the JB Weld epoxy catalog means there's a right formula for almost every repair — but picking the correct one matters. Consider the substrate (metal, plastic, wood, or composite), the operating temperature the repair will face, how quickly you need it to cure, and whether finished appearance is a factor. JB Weld can be used as an adhesive, laminate, plug, filler, sealant, or electrical insulator, making it worth evaluating not just as a simple glue, but as a multi-function repair material. Explore the full epoxy category to compare formulas, or visit the JB Weld brand page to browse the complete product range.