---
product_id: 48015164
title: "37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz, Grey"
brand: "j-b weld"
price: "€ 15.50"
currency: EUR
in_stock: true
category: "J B Weld"
url: https://www.desertcart.it/products/48015164-37901-extremeheat-high-temperature-resistant-metallic-paste-3-oz-grey
store_origin: IT
region: Italy
---

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

**Brand:** j-b weld
**Price:** € 15.50
**Availability:** ✅ In Stock

## Summary

> 🔥 Fix it like a pro, withstand the heat like a boss!

## Quick Answers

- **What is this?** 37901 ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz, Grey by j-b weld
- **How much does it cost?** € 15.50 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/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

- • **Quick Set & Long Cure:** Sets in just 1 hour, fully cures in 24 for durable, lasting repairs
- • **Versatile Application:** Perfect for exhausts, grills, fireplaces & automotive pipe sealing
- • **Extreme Heat Resistance:** Engineered to endure scorching 538°C without breaking a sweat
- • **Post-Cure Machinability:** Can be drilled, sanded, and machined—customize your repair with ease
- • **Precision Repair Filler:** Seamlessly fills cracks, holes & gaps in metal surfaces for flawless fixes

## Overview

J-B Weld 37901 ExtremeHeat is a high-temperature resistant metallic paste designed to repair and fill metal surfaces exposed to extreme heat up to 538°C (1000°F). Ideal for automotive exhausts, grills, and fireplaces, it sets in 1 hour and fully cures in 24 hours, becoming drillable and machinable for professional-grade repairs. Trusted by thousands for quick, durable fixes that keep your gear running under pressure.

## Description

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

## 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 | 12,603 in DIY & Tools ( See Top 100 in DIY & Tools ) 5 in Solder Pastes 4,455 in Home Care & Cleaning |
| Brand | J-B Weld |
| Colour | Gray |
| Compatible Material | Metal |
| Container Type | Tube |
| Country Of Origin | USA |
| Customer Reviews | 4.2 4.2 out of 5 stars (12,167) |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00043425379016 |
| Included Components | Metallic Paste Repair Bottle 3 oz. |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Type Name | ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz |
| Item Volume | 3 Fluid Ounces |
| Item Weight | 0.19 Pounds |
| Manufacturer | JBWeld |
| Manufacturer Part Number | 37901UK |
| Material | Metal, Aluminum |
| Model Number | 37901 |
| Number of Pieces | 1 |
| Other Special Features of the Product | Resistance to extreme temperatures and ability to repair and fill metal surfaces |
| Specific Uses For Product | [Exhaust Manifolds, Heat Exchangers, Mufflers, Outdoor Grills, Fireplaces, Automotive Pipe Sealers] |
| UPC | 043425379016 |
| Unit Count | 85.2 gram |
| Viscosity Level | High |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** J-B Weld
- **Item form:** Paste
- **Material:** Metal, Aluminum
- **Special feature:** Resistance to extreme temperatures and ability to repair and fill metal surfaces
- **Specific uses for product:** [Exhaust Manifolds, Heat Exchangers, Mufflers, Outdoor Grills, Fireplaces, Automotive Pipe Sealers]

## Images

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

## 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.it/products/48015164-37901-extremeheat-high-temperature-resistant-metallic-paste-3-oz-grey](https://www.desertcart.it/products/48015164-37901-extremeheat-high-temperature-resistant-metallic-paste-3-oz-grey)

---

*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-10-23*