--- product_id: 31857662 title: "37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz" brand: "j-b weld" price: "€ 18.93" currency: EUR in_stock: true reviews_count: 13 category: "J B Weld" url: https://www.desertcart.gr/products/31857662-37901-extremeheat-high-temperature-resistant-metallic-paste-3-oz store_origin: GR region: Greece --- # Full cure in 24 hours Withstands up to 1000°F / 537°C Permanent bond stronger than steel 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz **Brand:** j-b weld **Price:** € 18.93 **Availability:** ✅ In Stock ## Summary > 🔥 Fix it once, fix it extreme. The heat-proof bond that means business. ## Quick Answers - **What is this?** 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz by j-b weld - **How much does it cost?** € 18.93 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/31857662-37901-extremeheat-high-temperature-resistant-metallic-paste-3-oz) ## Best For - j-b weld enthusiasts ## Why This Product - Trusted j-b weld brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Eco-Smart & Safe:** No solvents or VOCs, waterproof and non-flammable—repair with confidence and care for your workspace. - • **Steel-Strong Bond:** Creates a permanent, non-flammable metallic weld that’s tougher than steel—ditch the torch, keep the precision. - • **DIY-Ready & Machinable:** Once cured, drill, sand, or machine it to perfection—customize your repair with professional-grade ease. - • **Extreme Heat Endurance:** Engineered to perform flawlessly in scorching environments up to 1000°F, making it your go-to for high-temp repairs. - • **Versatile Metal Mastery:** Perfect for iron, steel, alloy repairs on exhausts, grills, furnaces, and more—one paste, endless fixes. ## Overview J-B Weld 37901 ExtremeHeat is a 3 oz metallic paste designed for high-temperature repairs up to 1000°F (537°C). It forms a permanent, steel-strong bond without the need for torch welding, cures fully in 24 hours, and can be drilled or sanded after curing. Ideal for repairing iron, steel, and alloy components in extreme heat environments such as exhaust manifolds, grills, and furnaces, it is non-flammable, solvent-free, and waterproof, making it a reliable and eco-conscious choice for professional-grade fixes. ## Description J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz Review: Great product with long-term results, if you use it correctly! - I purchased this item to repair an ash fettle in an old Vermont Castings wood burning stove, and it completely exceeded my expectations outlasting an entire season of direct fire contact. The fettle was cracked into two pieces and a prior owner had drilled two holes on either side and tried to connect it with an aluminum "bridge." The repair interfered with the door closing, so I needed to seamlessly "weld" the two cast iron sides back together. Before going through the trouble of taking it to a welder and paying to have it repaired properly, I took a chance on this J-B Weld ExtremeHeat. I used a Dremel tool with a fine grinding stone and cleaned up the two broken faces, along with about 1/4 inch of the area on either side of the crack. Following the advice of another review, I then took a cotter pin, stuck it into the chuck of my battery powered drill, and used that to thoroughly stir the J-B Weld in the container (this is a one-time use container... once opened and stirred, use it and toss the rest). After stirring for just under 2 minutes, I immediately applied it to the two surfaces, pieced them together, and then spread a little more on either side to ensure a supported bond. I then set the item on a flat piece of cardboard to cure for 2 days. (NOTE: you have to support the joint while curing, because the J-B Weld provides no structural support until completely cured. While wet, the item will just fall apart again if the pieces aren't otherwise held together.) When it was done, I replaced the fettle and lit the first fire of the season (crossing my fingers at the same time). Several months and probably 100+ fires later, the piece was still holding strong like the day I put it in. The fettle sits right against the fire, and many logs have rolled into it while it was extremely hot, with no noticeable damage whatsoever. I would absolutely recommend and use the J-B Weld ExtremeHeat again on future projects. As long as the proper preparation is done, and you follow the instructions, it's an awesome product! Review: Fixed exhaust leak - Worked well for sealing my exhaust fittings. Easy to apply since its a bit thick, use it all in one go cause it isn't usable afterwards. ## Features - Jb Weld Extreme Heat: Is Formulated For Repairs To Iron, Steel And Metal In High Temperature Environments 1000°F / 537°C. Non-Flammable, It Contains No Solvents Or Volatile Organic Compounds (Vocs). - The Original Cold Weld: Jb Weld Was Developed As An Alternative To Torch Welding. Designed To Be Effective In Extreme Environments, Once It Sets, It Creates A Permanent Bond Stronger Than Steel. - Simple To Use: When Fully Cured, This Metallic Compound Can Be Drilled, Machined Or Sanded. It Is Great For Repairing Cracks, Small Gaps, Seam Connections Or Holes. - Versatile & Dependable: Ideal For Repair Work On : Exhaust Manifolds, Pipe Connections, Mufflers, Catalytic Converters, Outdoor Grills, Fire Boxes, Gas And Commercial Furnaces And Water Heaters. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01IBOBY74 | | Best Sellers Rank | #1,170 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Industrial Lubricants | | Brand | J-B Weld | | Brand Name | J-B Weld | | Color | Grey | | Compatible Material | Alloy Steel, Iron | | Container Type | Tube | | Customer Reviews | 4.2 out of 5 stars 12,099 Reviews | | Full Cure Time | 24 Hours | | Global Trade Identification Number | 00043425379016 | | Included Components | Metallic Paste Repair Bottle 3 oz. | | Item Form | Paste | | Item Package Quantity | 1 | | Item Type Name | ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz | | Item Weight | 0.19 Pounds | | Manufacturer | JBWeld | | Material | Metal, Aluminum | | Material Type | Metal, Aluminum | | Model | 37901 | | Other Special Features of the Product | Heat Resistant | | Part Number | 37901UK | | Special Feature | Heat Resistant | | Specific Uses For Product | ['Repair', 'High Temperature Environments'] | | UPC | 043425379016 043425700285 | | Unit Count | 3.0 Ounce | | Viscosity Level | High | | Volume | 3 Fluid Ounces | | Warranty Description | No Warranty | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** J-B Weld - **Item Form:** Paste - **Material:** Metal, Aluminum - **Special Feature:** Heat Resistant - **Specific Uses For Product:** ['Repair', 'High Temperature Environments'] ## Images ![37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz - Image 1](https://m.media-amazon.com/images/I/71FcUy0VcaL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can I use this to repair a stove burner grate? I dropped it and the pieces need to glued together. Thanks** A: No, this will not provide any type of structural support. This is a filler, we also do not recommend any of our products to be in direct flame. Thank you, J-B Weld Support **Q: Is this waterproof?** A: This is not waterproof. Left open to water/rain, this product will completely dissolve. **Q: Can this be used to"glue 2 pieces of metal together?** A: No. As per the manufacturer, it is "for repairing cracks, small gaps, seam connections or holes in exhaust manifolds, pipe connections, mufflers, catalytic converters, outdoor grills, fire boxes, gas and commercial furnaces and water heaters." It is NOT designed to bond two separate pieces together. **Q: Can i use this on an engine block steipped bolt hole?** A: I assume you meant "stripped". Is it one of the head bolt holes or another hole for mounting something else? If it is a head bolt hole, I'd use a heli-coil instead. JB Weld isn't very structural in strength. It's good in compression, but not sure about tension, torsion, or shear forces. In one of the questions, a JB Weld Support rep said "No, this will not provide any type of structural support", so I'd go with heli-coil instead. That will also keep the bolt hole centered closer to where it is now. With JB Weld the hole may end up in a slightly different location which would probably not be good. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product with long-term results, if you use it correctly! *by A***E on July 7, 2022* I purchased this item to repair an ash fettle in an old Vermont Castings wood burning stove, and it completely exceeded my expectations outlasting an entire season of direct fire contact. The fettle was cracked into two pieces and a prior owner had drilled two holes on either side and tried to connect it with an aluminum "bridge." The repair interfered with the door closing, so I needed to seamlessly "weld" the two cast iron sides back together. Before going through the trouble of taking it to a welder and paying to have it repaired properly, I took a chance on this J-B Weld ExtremeHeat. I used a Dremel tool with a fine grinding stone and cleaned up the two broken faces, along with about 1/4 inch of the area on either side of the crack. Following the advice of another review, I then took a cotter pin, stuck it into the chuck of my battery powered drill, and used that to thoroughly stir the J-B Weld in the container (this is a one-time use container... once opened and stirred, use it and toss the rest). After stirring for just under 2 minutes, I immediately applied it to the two surfaces, pieced them together, and then spread a little more on either side to ensure a supported bond. I then set the item on a flat piece of cardboard to cure for 2 days. (NOTE: you have to support the joint while curing, because the J-B Weld provides no structural support until completely cured. While wet, the item will just fall apart again if the pieces aren't otherwise held together.) When it was done, I replaced the fettle and lit the first fire of the season (crossing my fingers at the same time). Several months and probably 100+ fires later, the piece was still holding strong like the day I put it in. The fettle sits right against the fire, and many logs have rolled into it while it was extremely hot, with no noticeable damage whatsoever. I would absolutely recommend and use the J-B Weld ExtremeHeat again on future projects. As long as the proper preparation is done, and you follow the instructions, it's an awesome product! ### ⭐⭐⭐⭐⭐ Fixed exhaust leak *by M***V on May 4, 2026* Worked well for sealing my exhaust fittings. Easy to apply since its a bit thick, use it all in one go cause it isn't usable afterwards. ### ⭐⭐⭐⭐ Stuck like glue *by C***D on April 17, 2026* I wasn't expecting to have both parts in the single container. I was expecting to have the ability to measure out the amount of part A and part B so I could only mix up the amount I needed to repair my fake logs in my pellet stove. So the good news is that it appears to have worked, and my logs are now back in one piece. Checking the bottle after several weeks, the mixture has separated but remains liquid. Time will tell if the repair holds up. So far we have had several fires and it has held. ## Frequently Bought Together - J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz - J-B Weld ExhaustWeld 2" x 72" Repair Wrap, White - J-B Weld High Heat Epoxy Syringe, Dark Grey --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/31857662-37901-extremeheat-high-temperature-resistant-metallic-paste-3-oz](https://www.desertcart.gr/products/31857662-37901-extremeheat-high-temperature-resistant-metallic-paste-3-oz) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-05-31*