Best Fireplace Mortars

1. Rutland Fireplace Mortar Cartridge, 10.3-Ounce, Gray – 63G

The Rutland Fireplace Mortar Cartridge is a handy solution for fixing your fireplace. It’s perfect for small repairs like chips or cracks in firebrick. This 10.3-ounce cartridge comes in gray, buff, and black to match your needs.

It works great for re-pointing mortar joints and bonding firebricks. Use it inside only and apply heat to cure. It’s rated to 2000°F, so it’s built to last.

With 99 feet of coverage from a 1/8″ bead, it’s efficient and effective. This mortar cartridge is a must-have for keeping your fireplace safe and looking great.

2. Rutland Fireplace Mortar Cartridge, 10.3 Fl Oz, Buff – 63B

The Rutland Fireplace Mortar Cartridge is a strong and easy-to-use solution. It comes in Buff, Gray, and Black colors. This mortar is perfect for fixing cracks and chips.

Use it to repair small chips or broken firebricks. It also works to join firebricks and fill mortar joints. This product is for interior use only and needs heat to set.

It covers about 99 feet with a 1/8″ bead. The mortar can handle very high heat, up to 2000°F (1090°C). This makes it great for fireplace repairs that last.

3. Rutland Fireplace Mortar Cartridge, 10.3-Ounce, Gray – 63G (Pack of 2)

Rutland Fireplace Mortar Cartridge fixes fireplace bricks. It comes in gray, buff, or black. This mortar repairs cracks, bonds bricks, and fills joints.

It works for small fixes and big jobs. It makes a 1/8-inch bead that covers up to 99 feet. The mortar needs heat to harden and lasts up to 2000°F.

Each pack has two 10.3-ounce cartridges. This ensures you have spares for future fixes.

4. Rutland Fireplace Mortar Cartridge, 10.3 Fl Oz, Black – 63

Rutland Fireplace Mortar comes in Black, Buff, or Gray. It fixes small chips, cracks, and gaps in firebrick. Use it to bond bricks or re-point joints inside fireplaces.

This mortar needs heat to cure and works up to 2000°F. A 10.3 fl oz cartridge covers about 99 feet with a thin bead.

5. Tenon Refractory Mortar – High Temperature Mix for Fireplaces, Fire Pits, Chimneys, Parging, Brick, Clay, and More, White in Color, High Heat Resistance, Up to 2550°F (1, 10 Pounds)

Tenon Refractory Mortar is a preblended mix. Just add water and use it right away. It’s perfect for fireplaces, chimneys, and fire pits.

This mortar works indoors or outdoors. It handles high heat up to 2,550°F. It’s ASTM certified, meeting strict building code standards.

The mix gives you 1 hour to work before hardening. Once cured, it resists water and acid. It’s strong, durable, and ideal for brick, clay, or parging jobs.

6. Rutland Dry Mix 211 Refractory Mortar 2.5 Pound – USA-Made High Temperature Mortar for Masonry – 2550°F Fire Cement Patch for Fireplace Brick, Fire Pit, Kiln, Forge & Pizza Oven Repair

Rutland Dry Mix 211 Refractory Mortar is a strong, heat-resistant mortar. It holds fire bricks and masonry tiles firmly. This product works up to 2550°F.

Mix 2.5 pounds of dry mortar with 8 ounces of water. It cures just by air exposure—no heat needed. Use it outdoors or indoors and paint once dry.

Made entirely in the USA, this mortar is perfect for fireplaces, fire pits, kilns, and pizza ovens. It is easy to use and lasts long under high heat.

7. Meeco’s Red Devil 121 Gray Furnace Cement & Fireplace Mortar – High-Temperature Silicate Cement for FireBrick, Gasketing, Mortar Joints & Wood Stoves (10.3 fl oz Cartridge) – Made in The USA

Meeco’s Red Devil 121 is a high-temperature silicate cement for fireplaces, stoves, and furnaces. It seals gaps and bonds materials in high-heat environments up to 2,000°F.

This 10.3 oz cartridge offers precise, mess-free application for repairs. Use it to fix cracked firebrick, damaged mortar, or seal stove parts. Made in the USA since 1937, it’s trusted for long-lasting heat resistance and easy cleanup.

8. DAP 18854 Stove & Fireplace Mortar (Pack of 6)

DAP 18854 Stove & Fireplace Mortar is built for extreme heat. It withstands temperatures up to 2,000 °F, making it perfect for fireplaces, stoves, and fire pits.

This mortar uses a non-combustible silicate formula. It seals cracks and joints safely in chimneys, fireboxes, and brickwork.

Easy to apply and cleans up with water. Sets rock hard for lasting strength. Ideal for DIY repairs and new projects.

9. Meeco’s Red Devil 1354 Gray Furnace Cement & Fireplace Mortar – High-Temperature Silicate Cement for FireBrick, Gasketing, Mortar Joints & Wood Stoves (32 fl oz) – Ready to Use – Made in The USA

Meeco’s Red Devil 1354 Gray Furnace Cement is a 32 oz heat-resistant compound for fireplaces, stoves, and furnaces. It seals cracks in firebrick, mortar, and chimney parts with a strong, durable bond. This cement handles heat up to 2,000°F, staying tough in extreme conditions.

Its smooth texture spreads easily and cleans up with soap and water. Made in the USA since 1937, it’s a trusted choice for reliable, long-lasting repairs.

10. MEECO’S RED Devil 121 Furnace Cement and Fireplace Mortar (Two Pack)

MEECO’S RED Devil 121 Furnace Cement is a two-pack of 10.3 oz gray ready-to-use mortar. It bonds and seals masonry and metal in high-heat areas. This cement works up to 2000°F, perfect for firebrick, stoves, and chimneys.

Use it to fix cracks in firebrick, mortar joints, or gasketing. It’s ideal for wood stoves, furnaces, and ductwork. The cartridge design makes application fast and clean.

The pack includes two cartridges for multiple fixes. It’s a reliable, heat-resistant sealant for home heating systems.