---
product_id: 208933709
title: "Insulating Fire Brick, 2300F Rated, 4-Pack, 9\" x 4.5\" x 2.5\", 3123R"
brand: "lynn manufacturing"
price: "Bs.1701"
currency: BOB
in_stock: true
reviews_count: 10
category: "Lynn Manufacturing"
url: https://www.desertcart.bo/products/208933709-insulating-fire-brick-2300f-rated-4-pack-9-x-4
store_origin: BO
region: Bolivia
---

# 2300°F heat resistance Lightweight at 2.1 lbs each Easily cut & shaped with woodworking tools Insulating Fire Brick, 2300F Rated, 4-Pack, 9" x 4.5" x 2.5", 3123R

**Brand:** lynn manufacturing
**Price:** Bs.1701
**Availability:** ✅ In Stock

## Summary

> 🔥 Forge your future with fireproof finesse!

## Quick Answers

- **What is this?** Insulating Fire Brick, 2300F Rated, 4-Pack, 9" x 4.5" x 2.5", 3123R by lynn manufacturing
- **How much does it cost?** Bs.1701 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.bo](https://www.desertcart.bo/products/208933709-insulating-fire-brick-2300f-rated-4-pack-9-x-4)

## Best For

- lynn manufacturing enthusiasts

## Why This Product

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

## Key Features

- • **Securely Packaged:** Arrives in pristine condition, ready to elevate your creative projects.
- • **Customizable Crafting:** Shape, cut, and carve effortlessly using standard woodworking tools for perfect fit.
- • **Featherlight Durability:** At just 2.1 lbs, these bricks are easy to handle without compromising strength.
- • **Unmatched Heat Shielding:** Withstands extreme 2300°F temps to protect your craft and workspace.
- • **Versatile Artisan Essential:** Ideal for kilns, forges, jewelry casting, metal clay firing, and more.

## Overview

This 4-pack of insulating fire bricks measures 9" x 4.5" x 2.5" each, rated to withstand up to 2300°F. Made from alumina silica refractory ceramic clay, they combine lightweight design (2.1 lbs per brick) with low thermal conductivity, making them perfect for high-heat applications like kilns, forges, and jewelry soldering. Easily shaped with woodworking tools, these bricks offer versatile, durable insulation for professional and hobbyist artisans alike.

## Description

desertcart.com: Insulating Fire Brick, 2300F Rated, 4-Pack, 9" x 4.5" x 2.5", 3123R : Arts, Crafts & Sewing

Review: Perfect for my purposes - I am a goldsmith and use these for firing metal clay and soldering. They work great
Review: Affordable and easy to use. - Grateful product that I used to insulate the clean out door on the chimney for my woodstove. Easy to cut to size.

## Features

- Great insulator with low thermal conductivity and very low weight
- Easy to shape, cut, and carve with wood working tools
- Used for kilns, forges, furnaces, knife making, PMC metal clay firing, jewelry casting, or jewelry soldering block
- Specifications: 2300F rated, weight 2.1lbs., 9" x 4.5" x 2.5”, alumina silica refractory ceramic clay brick
- Well packed to ensure delivery in good condition

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0848GKTDS |
| Best Sellers Rank | #92,664 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #88 in Firing Accessories |
| Customer Reviews | 4.5 4.5 out of 5 stars (269) |
| Date First Available | October 27, 2021 |
| Item Form | Sheet |
| Item Thickness | 2.5 Inches |
| Item Weight | 8.8 pounds |
| Manufacturer | Lynn Manufacturing |
| Number of Items | 4 |
| Package Dimensions | 13.03 x 12.99 x 5.08 inches |
| UPC | 810527033555 |

## Product Details

- **Brand:** Lynn Manufacturing
- **Color:** Beige
- **Item Diameter:** 4.5 Inches
- **Material:** ceramic
- **Shape:** Rectangular

## Images

![Insulating Fire Brick, 2300F Rated, 4-Pack, 9" x 4.5" x 2.5", 3123R - Image 1](https://m.media-amazon.com/images/I/91JjqfJGGrL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect for my purposes
*by M***K on October 18, 2025*

I am a goldsmith and use these for firing metal clay and soldering. They work great

### ⭐⭐⭐⭐⭐ Affordable and easy to use.
*by R***J on September 22, 2025*

Grateful product that I used to insulate the clean out door on the chimney for my woodstove. Easy to cut to size.

### ⭐⭐⭐⭐⭐ Insulating Firebrick
*by W***L on October 19, 2024*

Have a very old kiln and the cover was broken. The firebricks replaced the broken firebricks and the lid works perfectly.

## Frequently Bought Together

- Insulating Fire Brick, 2300F Rated, 4-Pack, 9" x 4.5" x 2.5", 3123R
- Lynn Manufacturing Insulating Fire Brick, Heat Insulation Block, Low Thermal Conductivity, 1.25" x 4.5" x 9" Split, Pack of 2, 2300-F Rated, for Kilns, Forges, Furnaces, Soldering, 3143R

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**Shop now:** [https://www.desertcart.bo/products/208933709-insulating-fire-brick-2300f-rated-4-pack-9-x-4](https://www.desertcart.bo/products/208933709-insulating-fire-brick-2300f-rated-4-pack-9-x-4)

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*Product available on Desertcart Bolivia*
*Store origin: BO*
*Last updated: 2026-03-01*