Lightweight Insulating Castable Refractory Cement

Minimum Purchase:
2 units

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.