Description
Restore and maintain your fireplace with RUTLAND Black Fireplace Mortar, a high-temperature repair mortar designed for repairing damaged firebrick, filling cracks, and restoring mortar joints. Its black finish provides a clean, finished appearance that blends well with darker fireplace interiors and masonry surfaces.
Formulated to bond masonry to masonry, this durable fireplace mortar adheres to brick, firebrick, and stone, making it ideal for repairing small chips, re-pointing joints, and securing firebricks in place. The convenient 10.3 fl oz cartridge allows for easy, controlled application using a standard caulking gun, helping you complete fireplace repairs with precision.
Rated to withstand temperatures up to 2000°F (1090°C), RUTLAND Black Fireplace Mortar requires heat to cure and hardens to a strength comparable to firebrick. Once cured, the mortar can also be painted to complement your fireplace design. Made in the USA, this reliable repair solution is intended for indoor fireplace and stove maintenance.
Features:
- Black fireplace mortar provides a finished appearance for dark masonry surfaces
- Ideal for repairing cracked firebrick, small chips, and deteriorating mortar joints
- Bonds brick, firebrick, and stone to other masonry surfaces
- Withstands temperatures up to 2000°F (1090°C)
- Heat-cured formula hardens to a durable, firebrick-like finish
- Convenient 10.3 fl oz cartridge for application with a caulking gun
- Approximate coverage of 99 linear feet with a 1/8-inch bead
- Paintable after curing
- For indoor use only
- Made in the USA
California Proposition 65 Warning: This product can expose you to chemicals, including Crystalline Silica, which is known to the State of California to cause cancer. For more information, visit www.P65Warnings.ca.gov.
Application Instructions:
- Cut the nozzle tip at an angle to the desired opening size and insert the cartridge into a standard caulking gun.
- Fill the crack or hole with fireplace mortar, then smooth the surface using a putty knife dipped in water.
- Protect freshly applied mortar from direct contact with water until it has been fully heat cured.
- Allow the mortar to air dry for at least 24 hours, but no longer than 30 days, before heat curing.
- Start a low fire, keeping the temperature below 210°F until the mortar has dried thoroughly.
- Gradually increase the temperature and heat the mortar at 500°F for 1–2 hours to complete the final cure.
Important Application Notes:
- For cracks or joints deeper than 1/8 inch, apply the mortar in layers rather than filling the entire depth at once.
- Allow 24 hours of curing time between each layer.
- Once the mortar is tack-free, follow the recommended heat-curing process to complete the repair.
- For deeper cracks, use RUTLAND Castable Refractory Cement, Item #600/601.
