37901 Extremeheat Hi-temp Metallic Repair Paste, 3 Oz.

J-B Weld ExtremeHeat is a metallic repair paste engineered for bonding and filling iron, steel, and metal surfaces in high-temperature environments. This epoxy putty is formulated for automotive and industrial applications including exhaust manifolds, mufflers, catalytic converters, pipe connections, outdoor grills, fireboxes, furnaces, and water heaters—places where ordinary adhesives cannot withstand extreme heat.

Once fully cured, the metallic compound can be drilled, tapped, machined, sanded, ground, filed, and painted, making it ideal for precision repairs and finishing work. The water-based, non-flammable formula is free from solvents and volatile organic compounds.

Features and Benefits

• High Temperature Rating: Withstands temperatures up to 2,400°F for repairs in extreme heat applications.
• Machineable and Finishable: After curing, the hardened paste can be drilled, tapped, ground, sanded, and painted for seamless repairs.
• Non-Flammable Composition: Water-based formula with no solvents or VOCs.
• Strong Bond with Minimal Shrinkage: Cures to a tough, hard bond with little to no shrinkage.
• Workable After Curing: Supports drilling and tapping for threaded repairs and modifications.

Specifications

• Brand: J-B Weld
• Model: 37901
• Size: 3 oz.
• Color: Gray metallic
• Maximum Temperature Rating: 2,400°F
• Composition: Water-based, non-flammable, no solvents or VOCs
• Applications: Exhaust manifolds, mufflers, catalytic converters, pipe connections, outdoor grills, fireboxes, furnaces, water heaters