---
product_id: 621385023
title: "USM-4 Heavy Duty Firebricks 4-Pack Fireclay, Chamotte 3000F US Stove 9\" x 4-1/2\" x 1-1/4\" Insulating, Replacement Fire Bricks for Fireplaces, Wood Stoves, Pizza Ovens, Steel Furnaces, Forge"
brand: "girtech"
price: "3626 DH"
currency: MAD
in_stock: true
reviews_count: 13
category: "Gi Rtech"
url: https://www.desertcart.ma/products/621385023-usm-4-heavy-duty-firebricks-4-pack-fireclay-chamotte-3000f
store_origin: MA
region: Morocco
---

# 3000°F max heat resistance Enhanced thermal conductivity Cuttable for custom fit USM-4 Heavy Duty Firebricks 4-Pack Fireclay, Chamotte 3000F US Stove 9" x 4-1/2" x 1-1/4" Insulating, Replacement Fire Bricks for Fireplaces, Wood Stoves, Pizza Ovens, Steel Furnaces, Forge

**Brand:** girtech
**Price:** 3626 DH
**Availability:** ✅ In Stock

## Summary

> 🔥 Upgrade your hearth game with firebricks that bring the heat and the edge!

## Quick Answers

- **What is this?** USM-4 Heavy Duty Firebricks 4-Pack Fireclay, Chamotte 3000F US Stove 9" x 4-1/2" x 1-1/4" Insulating, Replacement Fire Bricks for Fireplaces, Wood Stoves, Pizza Ovens, Steel Furnaces, Forge by girtech
- **How much does it cost?** 3626 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/621385023-usm-4-heavy-duty-firebricks-4-pack-fireclay-chamotte-3000f)

## Best For

- girtech enthusiasts

## Why This Product

- Trusted girtech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile Domestic Use:** Ideal for fireplaces, wood stoves, pizza ovens, and blacksmith forges.
- • **Long-Lasting Protection:** Protects and insulates your heating unit, extending its lifespan.
- • **Optimized Heat Transfer:** Superior thermal conductivity boosts your heating efficiency.
- • **Unmatched Heat Endurance:** Withstand blazing temps up to 3000°F for ultimate durability.
- • **Precision Fit Customization:** Easily cut and shape bricks to perfectly line your hearth or stove.

## Overview

The USM-4 Heavy Duty Firebricks 4-Pack by GIRtech offers premium fireclay chamotte bricks engineered for domestic heating units. Rated for up to 3000°F, these cuttable, high thermal conductivity bricks ensure efficient heat distribution and durable furnace lining. Perfect for fireplaces, wood stoves, pizza ovens, and more, they deliver professional-grade insulation and protection to elevate your home heating experience.

## Description

Firebrick GIRtech USM Сhamotte heavy duty firebrick with additives is designed for the construction and internal lining of domestic heating units. GIRtech USM – chamotte firebrick has improved thermal conductivity compared to traditional chamotte products. Firebrick can be used in any type of domestic heating units, such as brick fireplaces, steel furnaces, heating stoves, barbecues and barbecue complexes, ceramics kilns and blacksmith forge. It can be used both for arranging the hearth of the furnace and for lining the inner surface of the furnace. Refractory masonry must be done on a fireclay/alumina mortar, for example GIRtech Ready Mix or GIRtech Dry Mix. Before performing work, it is necessary to moisten the contact surface with some water. It is not recommended to use cement mixes as a masonry mortar. GIRtech USM could be cutted or processed with a special tool if necessary. Firebricks are packed in branded cardboard boxes of 4 pieces

Review: Great strong bricks - Great bricks but a little thin. They work great with cement blocks.
Review: Good product - Good replacement for the fire bricks that came in my Lopi Revere.

## Features

- Enhanced Thermal Conductivity: GIRtech USM-4 fire bricks offer improved thermal conductivity compared to traditional chamotte products. Experience superior heat transfer and distribution, maximizing the efficiency of your heating units.
- High Refractoriness and Versatile Use: With a Maximum refractoriness of 3000 degrees Fahrenheit and service temperature 2760 degrees Fahrenheit, these fire bricks are suitable for various domestic heating units. Perfect for brick fireplaces, steel furnaces, heating stoves, barbecues, barbecue complexes, ceramics kilns, and blacksmith forges.
- Hearth Arrangement and Furnace Lining: Utilize these fire bricks for both arranging the hearth of the furnace and lining the inner surface. Ensure optimal insulation and protection for your heating unit, extending its lifespan and improving performance.
- Use with Alumina Mortar/Fireclay: Refractory masonry requires a fireclay/alumina mortar, such as GIRtech Ready Mix or GIRtech Dry Mix. Prior to installation, moisten the contact surface with water. Avoid using cement mixes as a masonry mortar.
- Cuttable and Processable: GIRtech USM fire bricks can be easily cut or processed with a special tool, allowing for customization and precise fitting as needed.
- Suitable for Domestic Use: These fire bricks are intended for domestic heating units and not for use in industrial units where contact with molten metals is possible. Ideal for enhancing the performance and efficiency of your home heating systems.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CXG3KRT5 |
| Best Sellers Rank | #46,846 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #60 in Firing Accessories |
| Customer Reviews | 4.6 4.6 out of 5 stars (361) |
| Date First Available | March 14, 2024 |
| Item Weight | 15.18 pounds |
| Item model number | USM-4 |
| Manufacturer | ABC Manufactured Goods Inc |
| Product Dimensions | 1.25 x 9 x 4.5 inches |

## Product Details

- **Brand:** GIRtech
- **Flavor:** Natural Wood
- **Item Form:** Block
- **Item Weight:** 6.9 Kilograms
- **UPC:** 601958244845

## Images

![USM-4 Heavy Duty Firebricks 4-Pack Fireclay, Chamotte 3000F US Stove 9" x 4-1/2" x 1-1/4" Insulating, Replacement Fire Bricks for Fireplaces, Wood Stoves, Pizza Ovens, Steel Furnaces, Forge - Image 1](https://m.media-amazon.com/images/I/51R91yHPOyL.jpg)
![USM-4 Heavy Duty Firebricks 4-Pack Fireclay, Chamotte 3000F US Stove 9" x 4-1/2" x 1-1/4" Insulating, Replacement Fire Bricks for Fireplaces, Wood Stoves, Pizza Ovens, Steel Furnaces, Forge - Image 2](https://m.media-amazon.com/images/I/61IgSolJWxL.jpg)
![USM-4 Heavy Duty Firebricks 4-Pack Fireclay, Chamotte 3000F US Stove 9" x 4-1/2" x 1-1/4" Insulating, Replacement Fire Bricks for Fireplaces, Wood Stoves, Pizza Ovens, Steel Furnaces, Forge - Image 3](https://m.media-amazon.com/images/I/71WKSYeU6BL.jpg)
![USM-4 Heavy Duty Firebricks 4-Pack Fireclay, Chamotte 3000F US Stove 9" x 4-1/2" x 1-1/4" Insulating, Replacement Fire Bricks for Fireplaces, Wood Stoves, Pizza Ovens, Steel Furnaces, Forge - Image 4](https://m.media-amazon.com/images/I/81B5-zpMBrL.jpg)
![USM-4 Heavy Duty Firebricks 4-Pack Fireclay, Chamotte 3000F US Stove 9" x 4-1/2" x 1-1/4" Insulating, Replacement Fire Bricks for Fireplaces, Wood Stoves, Pizza Ovens, Steel Furnaces, Forge - Image 5](https://m.media-amazon.com/images/I/81IOXQLWiVL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great strong bricks
*by M***W on November 20, 2025*

Great bricks but a little thin. They work great with cement blocks.

### ⭐⭐⭐⭐⭐ Good product
*by V***N on November 21, 2025*

Good replacement for the fire bricks that came in my Lopi Revere.

### ⭐⭐⭐⭐⭐ work as advertised
*by C***N on August 29, 2025*

These fire bricks work as advertised. Heat transmission from front to back is low. They can be 1000 degrees on one side and 200 degrees on the other. They come in foam cushingung so they do not break.

## Frequently Bought Together

- GIRtech USM-4 Heavy Duty Firebricks 4-Pack Fireclay, Chamotte 3000F US Stove 9" x 4-1/2" x 1-1/4" Insulating, Replacement Fire Bricks for Fireplaces, Wood Stoves, Pizza Ovens, Steel Furnaces, Forge
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*Product available on Desertcart Morocco*
*Store origin: MA*
*Last updated: 2026-02-16*