---
product_id: 48015164
title: "J-B Weld 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz, Grey"
brand: "j-b weld"
price: "AR$41850"
currency: ARS
in_stock: true
reviews_count: 13
category: "J B Weld"
url: https://www.desertcart.com.ar/products/48015164-j-b-weld-37901-extremeheat-high-temperature-resistant-metallic-paste
store_origin: AR
region: Argentina
---

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

**Brand:** j-b weld
**Price:** AR$41850
**Availability:** ✅ In Stock

## Summary

> 🔥 Fix the heat, beat the clock — your high-temp hero in a paste!

## 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?** AR$41850 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/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

- • **Versatile Application:** Perfect for exhaust manifolds, grills, fireplaces, and heat exchangers—your go-to high-temp fixer.
- • **Extreme Heat Endurance:** Repairs cracks and holes that face scorching 538°C temperatures without breaking a sweat.
- • **Precision Finish Ready:** Once cured, easily drill, machine, or sand for a seamless, professional repair.
- • **Quick Set, Long Lasting:** Sets in just 1 hour and cures in 24, so you’re back in action fast with durable results.
- • **Temporary Savior for Vintage Rides:** Ideal for emergency fixes on older cars, saving you costly repairs and keeping your ride roadworthy.

## Overview

J-B Weld 37901 ExtremeHeat is a high-temperature resistant metallic paste designed to withstand up to 538°C (1000°F). It fills cracks, holes, and gaps in exhaust systems, grills, and fireplaces, curing fully in 24 hours to create a durable, machinable repair surface. Ideal for quick, reliable fixes on heat-exposed metal parts, it offers a professional-grade solution for both DIY enthusiasts and emergency automotive 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 | 6,010 in DIY & Tools ( See Top 100 in DIY & Tools ) 5 in Solder Pastes 2,844 in Home Care & Cleaning |
| Brand | J-B Weld |
| Customer Reviews | 4.1 4.1 out of 5 stars (11,474) |
| 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/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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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-01-28*