FireRock’s adhesive mortar is a low-sand polymer modified with heat-resistant additives designed to work as a “glue” rather than a joint provider. This ensures your fireplace stays strong for the lifetime of your home build.

• Mortar for masonry chimney block must be purchased separately
• One bag of mortar is needed for every six masonry chimney pieces
• The necessary number of bags for each fireplace are included with the installation kit

Note: This mortar must be used to install the firebox in order for the FireRock warranty to be valid. It can also be used to install the firebrick, though substitutions are allowed.

Specifications