HeatShield Formula 51 is an insulating, high-temperature refractory mortar, developed specifically for parging smoke chamber walls. When properly applied, it will restore the integrity of your fireplace. This product will insulate, seal gaps, and smooth the smoke chamber walls as required by both NFPA and IRC codes.
Features
- Sticks to almost anything
- Insulates from heat and cold
- Smooths jagged edges
- Reshapes smoke chambers
- Insulates fireplace smoke chambers for increased safety


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