Description
Keep your fireplace masonry looking its best with RUTLAND Buff Fireplace Mortar. Designed for high-temperature fireplace repairs, this dependable mortar features a warm buff color that complements lighter firebrick, natural stone, and traditional masonry finishes.
Whether you're repairing small cracks, filling chipped firebrick, or re-pointing worn mortar joints, RUTLAND Buff Fireplace Mortar provides a strong, lasting bond between masonry surfaces. It can also be used to bond firebricks together, making it a practical solution for maintaining indoor fireplaces and wood-burning stoves. The ready-to-use 10.3 fl oz cartridge fits a standard caulking gun for convenient application without complicated mixing.
Engineered to withstand temperatures reaching 2000°F (1090°C), this heat-curing mortar develops a hard, firebrick-like finish once properly cured. The cured surface can be painted if desired, providing additional flexibility for your fireplace restoration project. Proudly made in the USA, RUTLAND Buff Fireplace Mortar offers a convenient way to maintain and repair masonry exposed to high heat.
Features:
- Warm buff color complements light-colored firebrick and masonry
- Repairs chipped firebrick, cracks, and damaged mortar joints
- Suitable for bonding brick, firebrick, and stone masonry
- High-temperature resistance up to 2000°F (1090°C)
- Requires heat curing for a strong, firebrick-like finish
- Ready-to-use 10.3 fl oz cartridge fits standard caulking guns
- Provides approximately 99 linear feet of coverage with a 1/8-inch bead
- Can be painted after curing
- Designed for indoor applications only
- Manufactured 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.
