---
product_id: 48015164
title: "J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz, Grey"
brand: "j-b weld"
price: "4656 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "J B Weld"
url: https://www.desertcart.is/products/48015164-j-b-weld-37901-extremeheat-high-temperature-resistant-metallic-paste
store_origin: IS
region: Iceland
---

# Fast 1-hour set time, full cure in 24 hours Withstands up to 538°C (1000°F) heat Drillable, machinable & sandable filler J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz, Grey

**Brand:** j-b weld
**Price:** 4656 kr
**Availability:** ✅ In Stock

## Summary

> 🔥 Fix the heat, beat the clock – your ultimate high-temp repair ally!

## Quick Answers

- **What is this?** J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz, Grey by j-b weld
- **How much does it cost?** 4656 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/48015164-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

- • **Precision Finish:** Once cured, it can be drilled, machined, or sanded for a seamless, professional repair.
- • **Rapid Set & Cure:** Get back to work fast with a 1-hour set time and full strength in just 24 hours.
- • **Trusted Durability:** Join thousands of pros who rely on J-B Weld’s proven metallic paste for long-lasting heat resistance.
- • **Versatile Application:** Perfect for exhausts, grills, fireplaces, and heat exchangers—your go-to high-temp fix.
- • **Extreme Heat Endurance:** Repairs cracks and holes that face scorching 538°C temps without breaking a sweat.

## Overview

J-B Weld 37901 ExtremeHeat is a high-temperature resistant metallic paste designed to withstand up to 538°C (1000°F). Ideal for repairing cracks, holes, and gaps in exhaust manifolds, grills, fireplaces, and heat exchangers, it sets in 1 hour and fully cures in 24 hours. The paste can be drilled, machined, and sanded after curing, offering a durable, professional-grade finish trusted by thousands.

## Description

Durable metallic paste withstands 1000Â°F (538Â°C) heat, repairs cracks, gaps, holes in exhaust, fireplaces. Cures in 24 hrs, can be drilled, machined, sanded.

Review: Will survive very hot temperatures. - Used this product to repair a splash grill inside my oven. A bracket to hold the grill in place had broken off. I used this compound to re fit the bracket to the grill which has to deal with very high temperatures. Excellent results, the bracket is now fitted to the grill again and everything back to normal. Would purchase this product again.
Review: Good - Good product

## Features

- Causes serious eye damage.
- Causes skin irritation.
- EXTREME HEAT - Designed to withstand temperatures up to 538°C.
- FILLER - Designed to be used as a filler for holes and cracks.
- APPLICATIONS - Exhaust manifolds, heat exchangers, mufflers, outdoor grills & fireplaces.
- TEMPERATURE LIMIT - 538°C
- SET TIME - 1 Hour CURE TIME - 24 Hours
- WEIGHT - 85 gram

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01IBOBY74 |
| Best Sellers Rank | 4,707 in DIY & Tools ( See Top 100 in DIY & Tools ) 3 in Solder Pastes 2,437 in Home Care & Cleaning |
| Brand | J-B Weld |
| Customer Reviews | 4.1 4.1 out of 5 stars (11,500) |
| Date First Available | 12 July 2016 |
| Item Weight | 86.2 g |
| Item model number | 37901 |
| Manufacturer | JBWeld |
| Manufacturer part number | 37901UK |
| Model | ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz |
| Product Dimensions | 4 x 4 x 5.2 cm; 86.18 g |
| Special Features | Heat Resistant |
| Viscosity | High |

## Product Details

- **Brand:** J-B Weld
- **Item form:** Paste
- **Material:** Dough
- **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, Grey - Image 1](https://m.media-amazon.com/images/I/61jO5Hia+xL.jpg)
![J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz, Grey - Image 2](https://m.media-amazon.com/images/I/71FcUy0VcaL.jpg)

## Available Options

This product comes in different **Pattern** options.

## Questions & Answers

**Q: i have a small hole in my woodburning boiler in the firebox . will it plug it?**
A: I had a crack next to the chimney connection. I used this to fill it. Repainted the whole stove black. You couldn’t see where the repair was. Lasted years and was still ok when we moved last year.

**Q: There is a small chip in my oven which exposes a metal base. Could I use this to fill the chip which is about the size of thumb nail. Thanks**
A: As long as you can clean any dust and dirt off first i don't see why not

**Q: Will it seal a hair line crack in water pipe inside a heat exchanger of a domestic boiler ( temperature very high) ?**
A: I would guess so as this is used for exhaust manifolds which get very hot ..not sure if waterproof though

**Q: Can this be used to seal around exhaust tail pipe**
A: Yea..I used this to seal a flange join on my EGR exhaust pipe and worked well

## Customer Reviews

### ⭐⭐⭐⭐⭐ Will survive very hot temperatures.
*by M***C on 10 December 2025*

Used this product to repair a splash grill inside my oven. A bracket to hold the grill in place had broken off. I used this compound to re fit the bracket to the grill which has to deal with very high temperatures. Excellent results, the bracket is now fitted to the grill again and everything back to normal. Would purchase this product again.

### ⭐⭐⭐⭐⭐ Good
*by B***N on 31 December 2025*

Good product

### ⭐⭐⭐⭐ Useful interim repair. Works with careful application.
*by R***Y on 16 January 2026*

Used it to seal a hole in a silencer box about the size of a penny. Not ideal as it was on the lower face of the box. Held in place with tape after application whilst curing. Winter application so curing took more than 24 hours. The seal held but the repair ballooned. Still in place but not an invisible repair. Useful as an interim repair.

## 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 Iceland*
*Store origin: IS*
*Last updated: 2026-02-06*