RTH-USA RB-40 Fireclay Refractory Bricks – Box of 6 – 9” x 4.5” x 1.25” High Heat Fire Bricks for Fireplaces, Kilns, Wood Stoves, and Ovens – 3000°F Heat Resistance

RB-40 Fireclay Refractory Bricks are built to deliver exceptional heat resistance, durability, and long-term performance in the toughest high-temperature applications. Each brick is produced from carefully selected natural raw materials, ensuring consistent quality and superior thermal stability. Designed to withstand service temperatures of up to 3000°F (1649°C), these firebricks offer reliable protection against intense heat, thermal cycling, and mechanical stress. This set of 6 refractory bricks is perfect for fireplaces, pizza ovens, firepits, kilns, forges, and wood-burning stoves, providing robust resistance to thermal shock, abrasion, and wear. Their dense fireclay structure offers excellent thermal mass, helping to retain and radiate heat efficiently for improved performance in cooking, heating, or industrial processes. Each brick measures 9 x 4.5 x 1.25 inches, making them versatile and easy to handle during installation or repair projects. Whether you are constructing a new refractory lining or repairing existing masonry, RB-40 ensures professional-grade results with lasting reliability. With convenient packaging in sets of 6, these bricks provide the right balance of strength, practicality, and value for both residential and industrial users. Dimensional Tolerances: Length: ± 5/32 in Width: ± 3/32 in Thickness: ± 1/16 in In accordance with ASTM C1261-22.

• High Heat Resistance: Withstands temperatures up to 3000°F, ideal for extreme thermal environments.
• Durable Construction: Made from premium fireclay for long-lasting performance and thermal shock resistance.
• Natural Raw Materials: Crafted from natural raw materials with minimal environmental impact.
• Versatile Applications: Perfect for fireplaces, fire pits, pizza ovens, kilns, wood stoves, and other high-heat installations.
• Convenient Pack: Includes 6 uniformly sized firebricks (9” x 4.5” x 1.25”) for easy installation and customization.
• Note: This product is not designed to serve as cooking appliances, or food-contact surfaces.
• Reinforced Grain Structure: Engineered with a dense, uniform grain composition that forms a strong internal framework, providing exceptional mechanical strength, long‑term durability, and resistance to cracking under extreme heat.
• Natural Surface Dust: Minor dust or surface particles may be present due to the chamotte brick manufacturing process. This is completely normal and does not affect the brick’s performance, strength, or durability.