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High Heat Mortar

High Heat Mortar


Sakrete® High Heat Mortar is a dry, medium-duty mortar ideal for setting masonry units in fireplaces, fire pits or chimney applications such as setting clay flue liners and parging a smoke chimney chamber. It has high heat resistant characteristics and excellent strength properties.



  • For applications up to 2550° F (1399° C)
  • Air entrained for freeze-thaw resistance
  • Underlayment or wear surface
  • One hour working time
  • Non water soluble
  • Great workability and high strength

Use For:

  • Laying fire brick or clay masonry in high heat applications
  • Use for constructing or tuck pointing fireplaces, barbecues, and chimney
  • Outdoor fireplaces and fire pits
  • Setting clay flue liners
  • Set or parging of smoke chambers


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