---
product_id: 48015164
title: "J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz, Grey"
brand: "j-b weld"
price: "295 DH"
currency: MAD
in_stock: true
reviews_count: 13
category: "J B Weld"
url: https://www.desertcart.ma/products/48015164-j-b-weld-37901-extremeheat-high-temperature-resistant-metallic-paste
store_origin: MA
region: Morocco
---

# Cures fully in 24 hours Withstands up to 538°C Drillable, machinable, sandable J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz, Grey

**Brand:** j-b weld
**Price:** 295 DH
**Availability:** ✅ In Stock

## Summary

> 🔥 Fix the heat, beat the heat – repair like a pro!

## 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?** 295 DH with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ma](https://www.desertcart.ma/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

- • **Durable & Workable:** Once cured, can be drilled, machined, or sanded to fit your exact repair needs with professional finish.
- • **Fast Set, Long Cure:** Sets in just 1 hour and fully cures in 24 hours, minimizing downtime and maximizing reliability.
- • **Versatile Application:** Perfect for exhaust manifolds, heat exchangers, mufflers, and outdoor grills—your go-to high-temp solution.
- • **Extreme Heat Resistance:** Engineered to endure scorching temperatures up to 538°C (1000°F) without breaking down.
- • **Precision Repair Filler:** Seamlessly fills cracks, holes, and gaps in exhausts, grills, and fireplaces for a flawless fix.

## 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 systems, grills, and fireplaces, it sets quickly in 1 hour and fully cures in 24 hours. The durable paste can be drilled, machined, and sanded post-cure, making it a versatile and reliable solution for professional-grade heat repairs.

## 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: Works - I used this to repair the steel hood on an old Tilley storm lantern. It's right at the end of this products temperature range so I was doubtful if it would work, but after 14 hours of running it's still holding up fine.

## 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 | 4,924 in DIY & Tools ( See Top 100 in DIY & Tools ) 4 in Solder Pastes 2,665 in Home Care & Cleaning |
| Brand | J-B Weld |
| Customer Reviews | 4.1 4.1 out of 5 stars (11,573) |
| 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:** [Exhaust Manifolds, Heat Exchangers, Mufflers, Outdoor Grills, Fireplaces, Automotive Pipe Sealers]

## Images

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

## 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.

### ⭐⭐⭐⭐⭐ Works
*by A***R on 8 March 2026*

I used this to repair the steel hood on an old Tilley storm lantern. It's right at the end of this products temperature range so I was doubtful if it would work, but after 14 hours of running it's still holding up fine.

### ⭐⭐⭐⭐ 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

---

## 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.ma/products/48015164-j-b-weld-37901-extremeheat-high-temperature-resistant-metallic-paste](https://www.desertcart.ma/products/48015164-j-b-weld-37901-extremeheat-high-temperature-resistant-metallic-paste)

---

*Product available on Desertcart Morocco*
*Store origin: MA*
*Last updated: 2026-03-11*