---
product_id: 31857662
title: "J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz"
brand: "j-b weld"
price: "KD 4.00"
currency: KWD
in_stock: true
reviews_count: 13
category: "J B Weld"
url: https://www.desertcart.com.kw/products/31857662-j-b-weld-37901-extremeheat-high-temperature-resistant-metallic-paste
store_origin: KW
region: Kuwait
---

# Full cure in 24 hours Withstands up to 1000°F / 537°C Permanent bond stronger than steel J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz

**Brand:** j-b weld
**Price:** KD 4.00
**Availability:** ✅ In Stock

## Summary

> 🔥 Fix it once, fix it forever — the ultimate heat-resistant weld!

## Quick Answers

- **What is this?** J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz by j-b weld
- **How much does it cost?** KD 4.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/31857662-j-b-weld-37901-extremeheat-high-temperature-resistant-metallic-paste)

## 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

- • **Heatproof Hero:** Engineered to endure extreme temperatures up to 1000°F, perfect for high-heat repairs.
- • **Versatile Fix-It:** Ideal for exhausts, grills, furnaces, and more—your go-to for metal repairs under pressure.
- • **Eco-Smart Formula:** Non-flammable and solvent-free, safe for you and the environment.
- • **Steel-Strong Bond:** Creates a permanent, machinable bond that outperforms traditional welding.
- • **Ready When You Are:** Fast 24-hour cure time means less downtime and quicker project completion.

## Overview

J-B Weld 37901 ExtremeHeat is a high-temperature resistant metallic paste designed for permanent repairs on iron, steel, and metal surfaces exposed to heat up to 1000°F. It cures fully in 24 hours to form a bond stronger than steel, is non-flammable, solvent-free, and can be drilled or sanded after curing. Perfect for automotive exhausts, grills, furnaces, and other extreme heat applications.

## 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: J-B Weld To The Rescue! - J-B Weld to the rescue! My 2004 Nissan Xterra V6 developed a leak at the exhaust manifold side of the pipe connecting the EGR valve to the exhaust manifold. The tell tale sign was smoke (like cigarette smoke) coming from the base of the pipe to the EGR valve and the smell of unburnt fuel. The ideal solution was to replace the pipe but there is no room to get to the hold down nut anchoring the pipe to the manifold. I decided to use J-B Weld 37901 to seal the leak. I had my doubts but after applying three layers of this stuff, one day at a time, there is no sign of the smoke and smell. This was not easy to apply because of the tight space but it worked well using just one finger (mechanic's gloved) tracing around the pipe connector to the manifold. It dries quickly and spreads slowly to keep the form. Time will tell if the fix will hold for at least a year. Check out the pictures.

## 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 | #1,387 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Industrial Lubricants |
| Brand | J-B Weld |
| Color | Grey |
| Customer Reviews | 4.2 4.2 out of 5 stars (11,772) |
| Date First Available | July 12, 2016 |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00043425379016 |
| Is Discontinued By Manufacturer | No |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Volume | 3 Fluid Ounces |
| Item Weight | 3.04 ounces |
| Item model number | 37901 |
| Manufacturer | JBWeld |
| Manufacturer Part Number | 37901UK |
| Material | Metal, Aluminum |
| Model | ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz |
| Package Information | Tube |
| Product Dimensions | 1.57 x 1.57 x 2.05 inches |
| Special Feature | Heat Resistant |
| Special Features | Heat Resistant |
| Specific Uses For Product | ['Repair', 'High Temperature Environments'] |
| UPC | 043425379016 043425700285 |
| Unit Count | 3.0 Ounce |
| Viscosity | High |
| Viscosity Level | High |
| 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

![J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz - Image 1](https://m.media-amazon.com/images/I/71FcUy0VcaL.jpg)

## 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!

### ⭐⭐⭐⭐⭐ J-B Weld To The Rescue!
*by X***P on November 25, 2025*

J-B Weld to the rescue! My 2004 Nissan Xterra V6 developed a leak at the exhaust manifold side of the pipe connecting the EGR valve to the exhaust manifold. The tell tale sign was smoke (like cigarette smoke) coming from the base of the pipe to the EGR valve and the smell of unburnt fuel. The ideal solution was to replace the pipe but there is no room to get to the hold down nut anchoring the pipe to the manifold. I decided to use J-B Weld 37901 to seal the leak. I had my doubts but after applying three layers of this stuff, one day at a time, there is no sign of the smoke and smell. This was not easy to apply because of the tight space but it worked well using just one finger (mechanic's gloved) tracing around the pipe connector to the manifold. It dries quickly and spreads slowly to keep the form. Time will tell if the fix will hold for at least a year. Check out the pictures.

### ⭐⭐⭐⭐⭐ good product
*by K***H on January 21, 2026*

worked great

## 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

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-01-29*