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J-B Weld ExtremeHeat is a professional-grade high-temperature metallic repair paste specially formulated for repairing and restoring iron, steel, and other metal surfaces exposed to extreme heat. Designed to withstand temperatures up to 1,000°F (537°C), it provides a durable and long-lasting solution for repairing cracks, seams, gaps, and holes in high-heat equipment and components.
Unlike conventional adhesives and fillers that can fail under intense temperatures, J-B Weld ExtremeHeat cures into a strong metallic bond that is engineered to perform in demanding environments. Its non-flammable, solvent-free, and VOC-free formula makes it a dependable choice for automotive, industrial, commercial, and household repair applications.
Whether you are restoring an exhaust manifold, sealing a furnace connection, repairing a muffler, or maintaining outdoor cooking equipment, J-B Weld ExtremeHeat offers a reliable alternative to costly replacements. Once fully cured, the repair can be drilled, machined, sanded, and finished as required, making it suitable for both professional tradespeople and DIY users seeking a permanent repair solution.
Built on J-B Weld's reputation for durable metal repair products, ExtremeHeat delivers exceptional performance where ordinary fillers and adhesives simply cannot withstand the heat.
High-Temperature Performance
Engineered to withstand continuous exposure to temperatures up to 1,000°F (537°C), making it ideal for repairing metal components operating in extreme heat environments.
Metallic Repair Compound
Forms a durable metallic repair that bonds securely to iron, steel, and other metal surfaces. Designed for repairing cracks, gaps, seams, and holes without the need for welding equipment.
Non-Flammable & VOC-Free Formula
Contains no solvents or volatile organic compounds (VOCs), providing a safer and cleaner repair solution for workshop, industrial, and home use.
Machineable After Curing
Once fully cured, the repaired area can be drilled, machined, sanded, shaped, or finished to suit the application.
Cost-Effective Alternative to Replacement
Helps extend the life of damaged high-temperature components, reducing downtime and replacement costs.
Suitable for Multiple Applications
Commonly used for repairing exhaust systems, heating equipment, grills, furnaces, water heaters, and other metal components exposed to high temperatures.
Specifications
Brand: J-B Weld
Product Name: ExtremeHeat
Type: High Temperature Metallic Repair Paste
Size: 3 oz (85g)
Maximum Temperature Resistance: 1,000°F / 537°C
Colour: Metallic Grey
Formula: Non-Flammable, Solvent-Free, VOC-Free
Recommended Applications
J-B Weld ExtremeHeat is ideal for repairing and restoring:
Exhaust manifolds
Exhaust pipes
Mufflers
Catalytic converters
Pipe connections
Outdoor grills and BBQ pits
Fire boxes
Gas furnaces
Commercial furnaces
Water heaters
High-temperature metal equipment