BOSS® Product




BOSS® 139 Hi-Temp Mortar

  • A non-combustible silicate cement for temperature ranges from 0°F - 800°F
  • Formulated for repairing chimneys, fireplaces, and sealing wood-burning stoves and appliances.
  • Excellent adhesion and sets to become rock hard when cured.
  • Conforms to ASTM E-136
  • This sealant can be used on wood frame construction where a non-combustible sealant is required.
  • No asbestos fillers
  • VOC Compliant
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