---
product_id: 48015164
title: "37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz, Grey"
brand: "j-b weld"
price: "262 DH"
currency: MAD
in_stock: true
reviews_count: 13
category: "J B Weld"
url: https://www.desertcart.ma/products/48015164-37901-extremeheat-high-temperature-resistant-metallic-paste-3-oz-grey
store_origin: MA
region: Morocco
---

# Cures fully in 24 hours Withstands up to 538°C (1000°F) heat Drillable, machinable & sandable filler 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz, Grey

**Brand:** j-b weld
**Price:** 262 DH
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz, Grey by j-b weld
- **How much does it cost?** 262 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/48015164-37901-extremeheat-high-temperature-resistant-metallic-paste-3-oz-grey)

## 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

- • **Extreme Heat Endurance:** Repairs cracks and holes that survive intense 538°C temperatures without breaking down.
- • **Quick Set, Long-Lasting Hold:** Sets in just 1 hour and fully cures in 24 hours for reliable, lasting repairs.
- • **Precision Filler for Tough Jobs:** Seamlessly fills gaps in exhausts, grills, and fireplaces with a durable metallic paste.
- • **Versatile Post-Cure Workability:** Once cured, can be drilled, machined, or sanded to perfect your repair finish.
- • **Trusted by DIY Pros & Car Enthusiasts:** Ideal for emergency fixes on vintage cars and high-heat home appliances alike.

## Overview

J-B Weld 37901 ExtremeHeat is a high-temperature resistant metallic paste designed to withstand up to 538°C (1000°F). Perfect for repairing cracks, holes, and gaps in exhaust manifolds, grills, and fireplaces, it sets in 1 hour and fully cures in 24 hours. The paste is drillable, machinable, and sandable after curing, making it a versatile and durable 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: Got my car through one last MOT - This type of product is for people that have an old car that isn't worth pouring money into. My car almost got scrapped after its last MOT due to a catalytic converter exhaust leak, and cats are very expensive. Thankfully, this product did the trick and plugged the hole, allowing it to pass. Be careful though as it's fairly liquid and you'll need to be careful applying it. After it dried, I also covered it in a lot of gun gum to help it hold a bit better. Also note that this is by no means a permanent repair - the car will need a new catalytic converter at some point.... but not today. Excellent for a temporary quick fix... but your old car will get scrapped one day anyways!

## 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 | 4,627 in DIY & Tools ( See Top 100 in DIY & Tools ) 3 in Solder Pastes 2,443 in Home Care & Cleaning |
| Brand | J-B Weld |
| Customer Reviews | 4.1 4.1 out of 5 stars (11,484) |
| 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

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

### ⭐⭐⭐⭐⭐ Got my car through one last MOT
*by B***. on 14 February 2024*

This type of product is for people that have an old car that isn't worth pouring money into. My car almost got scrapped after its last MOT due to a catalytic converter exhaust leak, and cats are very expensive. Thankfully, this product did the trick and plugged the hole, allowing it to pass. Be careful though as it's fairly liquid and you'll need to be careful applying it. After it dried, I also covered it in a lot of gun gum to help it hold a bit better. Also note that this is by no means a permanent repair - the car will need a new catalytic converter at some point.... but not today. Excellent for a temporary quick fix... but your old car will get scrapped one day anyways!

### ⭐⭐⭐⭐ Only tiny holes
*by E***D on 23 March 2025*

Very good, but for very small holes as described

## 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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**Shop now:** [https://www.desertcart.ma/products/48015164-37901-extremeheat-high-temperature-resistant-metallic-paste-3-oz-grey](https://www.desertcart.ma/products/48015164-37901-extremeheat-high-temperature-resistant-metallic-paste-3-oz-grey)

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*Product available on Desertcart Morocco*
*Store origin: MA*
*Last updated: 2026-02-06*