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Lightweight Insulating Castable Refractory Cement

Minimum Purchase:
2 unit(s)

Product Description

Ideal for insulating under the hearth firebrick (the cooking surface) in bread and pizza ovens!


  • Replaces Vermiculite or Perlite in your oven base.

  • Castable weighs approximately 35lbs per cubic foot and is shipped in a 50lb bag.

  • For estimating purposes, approximately 3lbs will cover one square foot, one inch thick.

  • Add approximately six gallons of clean water per bag and mix thoroughly. No other additives required.

  • May be cast or troweled into place.

  • Possesses cold crushing strength of approximately 200lbs per square inch.

  • Apply at a minimum 2 – 3 inches thick.

  • This product is Non-Water Soluble in service (under cooking surface firebrick). 


This is a higher-end insulating castable which is a replacement to the lower-cost Vermiculite / Perlite : Portland Cement blend.


FedEx &/or Freight Delivery is included in the price.