IN-23 2300°F
Insulating Firebrick


Insulating Firebricks (IFB), also known as Fire Bricks, are used in high-temperature applications ranging from 2,000°F (1,093°C) to 3,200°F (1,760°C). IN-23’s are rated for 2300℉.

If you need a specific grade, machining, or different shapes please contact our office directly for a custom quote.

Shipping Information

Insulating Firebricks must be shipped freight to ensure safe delivery. Orders less than a full pallet incur a $50 broken pallet fee. Please contact us directly for a custom shipping quote or place your order and a CeraMaterials’ representative will contact you to confirm shipping cost before processing your order or if you would like to pick up the material, please contact the office directly for available options.

SKU: N/A Category:


Temperature Rating: 2300℉

Grade: IN-23

Density: 36lbs/ft³

Product Documentation


  • Lining Kilns
  • Insulating Ovens, Furnaces, and Flues.
  • Fireplaces and Fireboxes.
  • Glass and Ceramic industries.
  • Electrolytic Aluminum Industries.
  • Iron & Steel Industries.
  • Non-Ferrous Metals industries.
  • Power Generation Industries.


  • High purity and superior insulating values.
  • Excellent strength at ambient and elevated temperatures.
  • High compression and cold crushing strength
  • Low thermal conductivity
  • Precise dimensions and machining.
  • Lightweight and energy-efficient.
  • Lower heat storage than denser refractories.
  • Extremely low levels of iron and other impurities.
  • Quick and economical heating to operating temperatures.
  • Cools quickly to minimize time on periodic operations.
  • Rigid and capable of exposure to harsh and abrasive applications.
  • Easily cut or modified with standard hand tools.
  • Differing grades and formulations to meet specific thermal and physical requirements.


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