RTH-USA RB-40 Fireclay Refractory Bricks | Box of 6 – 9” x 4.5” x 1.25” | High Heat Fire Bricks | 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.