---
product_id: 31857662
title: "37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz"
brand: "j-b weld"
price: "S$17"
currency: SGD
in_stock: true
reviews_count: 8
category: "J B Weld"
url: https://www.desertcart.sg/products/31857662-37901-extremeheat-high-temperature-resistant-metallic-paste-3-oz
store_origin: SG
region: Singapore
---

# 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:** S$17
**Availability:** ✅ In Stock

## Summary

> 🔥 Fix it once, fix it forever — the heat-proof hero your toolkit deserves!

## Quick Answers

- **What is this?** 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz by j-b weld
- **How much does it cost?** S$17 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/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

- • **Steel-Strong Bond:** Creates a permanent, non-flammable metallic weld stronger than steel—no torch needed.
- • **User-Friendly Formula:** Easy to mix and apply, cures in just 24 hours, and can be drilled or sanded post-cure.
- • **Versatile Application:** Ideal for exhausts, grills, furnaces, and more—repair cracks, gaps, and holes with confidence.
- • **Waterproof & VOC-Free:** Safe for indoor/outdoor use with no solvents or harmful fumes—work smarter, not harder.
- • **Extreme Heat Resistance:** Engineered to endure scorching temperatures up to 1000°F, perfect for high-heat repairs.

## Overview

J-B Weld 37901 ExtremeHeat is a 3 oz metallic paste designed for high-temperature repairs up to 1000°F. It forms a permanent, steel-strong bond without flames or solvents, cures fully in 24 hours, and is versatile enough for automotive, industrial, and home applications. Waterproof and VOC-free, it’s the go-to solution for professionals and DIYers tackling extreme heat challenges.

## 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 | #1,305 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #10 in Industrial Lubricants |
| Brand Name | J-B Weld |
| Color | Grey |
| Compatible Material | Alloy Steel, Iron |
| Container Type | Tube |
| Customer Reviews | 4.2 out of 5 stars 11,729 Reviews |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00043425379016 |
| Included Components | Metallic Paste Repair Bottle 3 oz. |
| Item Form | Paste |
| Item Height | 5.2 centimeters |
| Item Package Quantity | 1 |
| Item Type Name | ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz |
| Item Weight | 3.04 ounces |
| Manufacturer | JBWeld |
| Material Type | Metal, Aluminum |
| Model | 37901 |
| Other Special Features of the Product | Heat Resistant |
| Specific Uses For Product | ['Repair', 'High Temperature Environments'] |
| UPC | 043425379016 043425700285 |
| Unit Count | 3.0 Ounce |
| Viscosity | 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!

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Great product!
*by J***M on November 14, 2025*

I used JB weld extreme heat on my outdoor wood boiler. The cast iron door had a nickel sized hole and the steel that the door closes against had deteriorated because of the hole in the door. This stuff worked with minimal effort. The steel and cast iron was cleaned to the bare metal with a wire brush on a drill to insure adhesion. The high heat has not affected the JB weld whatsoever. Highly recommended.

## 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 Singapore*
*Store origin: SG*
*Last updated: 2026-01-27*