Front view of the J-B Weld Professional blister packaging containing two 5 ounce tubes and listing features like 5020 PSI strength and 4 to 6 hour set time.
Back view of the packaging displaying detailed instructions for preparation, mixing, applying, and drying alongside safety warnings.
Studio view of the two 5 ounce squeeze tubes included in the kit, one red hardener tube and one black steel resin tube.
Infographic featuring the J-B Weld Professional tubes and a weight icon highlighting the 5020 PSI tensile strength rating and steel reinforcement.
Infographic listing suitable materials for repair including all metals, stone, concrete, fiberglass, rigid plastic, wood, and ceramic.
Infographic showing four close-up photos demonstrating that the cured epoxy can be sanded, drilled, painted, and tapped.
Infographic detailing the technical specifications including set time, cure time, and fuel resistance while showing a close-up of application.
Step-by-step visual guide titled Easy To Use showing three steps: dispense equal amounts, mix, and apply.
Front view of the J-B Weld Professional blister packaging containing two 5 ounce tubes and listing features like 5020 PSI strength and 4 to 6 hour set time.
Back view of the packaging displaying detailed instructions for preparation, mixing, applying, and drying alongside safety warnings.
Studio view of the two 5 ounce squeeze tubes included in the kit, one red hardener tube and one black steel resin tube.
Infographic featuring the J-B Weld Professional tubes and a weight icon highlighting the 5020 PSI tensile strength rating and steel reinforcement.
Infographic listing suitable materials for repair including all metals, stone, concrete, fiberglass, rigid plastic, wood, and ceramic.
Infographic showing four close-up photos demonstrating that the cured epoxy can be sanded, drilled, painted, and tapped.
Infographic detailing the technical specifications including set time, cure time, and fuel resistance while showing a close-up of application.
Step-by-step visual guide titled Easy To Use showing three steps: dispense equal amounts, mix, and apply.
J-B Weld

J-B Weld Professional Size Steel Reinforced Epoxy Twin Tube Cold Weld System High Heat 5020 PSI Metal Repair 10 oz 8281

Only 1 left
SKU: 8281
$13.29

Description

The World's Strongest Bond for Heavy-Duty Professional Repairs

The J-B Weld 8281 Professional Size Steel Reinforced Epoxy is the supersized version of the legendary "Original Cold Weld" system, designed for substantial industrial, automotive, and marine projects. This two-part epoxy system provides a viable alternative to torch welding, creating a permanent bond that is stronger than steel itself. With an incredible tensile strength of 5020 PSI, this formula is engineered to handle the toughest repairs on metal, iron, concrete, and more, ensuring that your fix isn't just temporary, but a long-lasting structural solution.

Versatility and durability are at the core of J-B Weld's performance. Once mixed at a simple 1:1 ratio, the epoxy sets in 4-6 hours and achieves a full, rock-hard cure in 15-24 hours. After curing, the material transforms into a dark grey, metal-like substance that can be drilled, tapped, machined, filed, sanded, and painted to match the original surface. It is fully waterproof and resistant to petroleum, chemicals, and acids, and—unlike fast-setting alternatives—it can withstand extreme temperatures up to 550°F (287°C), making it ideal for engine blocks, exhaust manifolds, and high-heat machinery.

Key Features

  • Professional Capacity: Large 10 oz kit provides ample material for big jobs or frequent shop use.
  • Superior Strength: Delivers a massive 5020 PSI tensile strength for structural integrity.
  • High Heat Resistance: Withstands temperatures up to 550°F, perfect for engine and industrial applications.
  • Machinable Finish: Cures to a hard state that can be drilled, tapped, sanded, filed, and painted.
  • Chemical Resistance: Impervious to water, petroleum, acid, and other harsh shop fluids.
  • Versatile Bonding: Adheres permanently to metal, plastic, wood, concrete, ceramic, fiberglass, and tile.

What's Included

  • (1) 5 oz. Tube of Steel Reinforced Epoxy Resin
  • (1) 5 oz. Tube of Hardener

Specifications

Brand J-B Weld
Model Number 8281
Total Volume 10 fl oz
Tensile Strength 5,020 PSI
Shear Strength 5,020 PSI
Set Time 4 to 6 Hours
Full Cure Time 15 to 24 Hours
Max Temp Range Up to 550°F
Cured Color Dark Grey
Mix Ratio 1:1
Application Temperature Up to 120°F
Container Type Tube
Pro-Tip: The strength of the bond is directly related to surface preparation. Smooth surfaces can prevent the epoxy from gripping effectively. Always clean the repair area with a detergent or degreaser to remove oil, and then roughen the surface with coarse sandpaper or a file. This creates a "mechanical lock" that ensures the J-B Weld holds its full 5020 PSI capacity.