Best Mortar For Chimney In September 2026

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There is always a perfect Best Mortar For Chimney out there in the market for you. However, you may not have the time and resources to try and research each of them in detail. So we’ve done the heavy lifting and are sharing below our detailed review of Top 10 Best Mortar For Chimney.

To help you in your search, we have completed this list of the Best Mortar For Chimney.

Top Rated Best Mortar For Chimney Of 2026

Rank	Product Name	Score
1	Rutland 610 Refractory Cement, 64 Fl Oz Buy Now	9.7 Buy Now
2	Rutland Products Buy Now	9.5 Buy Now
3	Red Devil 0466 Fireplace & Stove Repair Sealant, Black, 10.1 fl. oz., 1 Buy Now	9.1 Buy Now
4	Chimney Rx Elastomeric 1/2 Gallon Buy Now	8.8 Buy Now
5	MEECO'S RED DEVIL 610 Refractory Cement - Indoor Use Only Buy Now	8.6 Buy Now
6	CHIMNEYRX Brushable Chimney Crown Repair, 1 Gallon Buy Now	8.3 Buy Now
7	Rutland Products Black, 32 fl oz Furnace Cement Buy Now	8.1 Buy Now
8	CHIMNEYRX Masonry Chimney Water Repellent, 1 Gallon Buy Now	7.8 Buy Now
9	ChimneyRx Masonry Fireplace Crack & Joint Sealant - 1 Pint Buy Now	7.5 Buy Now
10	MEECO'S RED DEVIL 121 Furnace Cement and Fireplace Mortar Buy Now	7.2 Buy Now

1. Rutland 610 Refractory Cement, 64 Fl Oz

• Color: buff
• For interior use only
• Rated up to 2000 degrees f (1090 degrees c)
• Thick, smooth consistency makes this cement amazing for mortar between firebricks
• Ready-to-use pre-mixed cement sticks easily to masonry in your firebox to fill in small gaps
• Requires minimum 500 degree f heat cure

2. Rutland Products

• Sets as hard and as strong as firebrick after curing
• Buff (tan) colored fireplace mortar
• Approximate coverage: 99 feet with 1/8" bead.
• Rated to 2000f (1090c)
• Perfect for repairing small chips or cracked firebrick, re-pointing mortar joints between firebricks, and bonding firebricks together

3. Red Devil 0466 Fireplace & Stove Repair Sealant, Black, 10.1 fl. oz., 1

• Non-flammable
• Interior use only
• Withstands temperatures up to 1000f
• Water clean up
• Ideal for patching fire bricks and sealing wood-burning stoves
• Sets rock hard when fired

4. Chimney Rx Elastomeric 1/2 Gallon

• Easy brush-on application (brush not included)
• 1/2 gallon covers 14 sq. ft.
• Stops leaks around chimney flashings, skylights, stacks, & vents
• Ready to use, no mixing required, cleanup with soap & water
• Remains permanently flexible to stop chimney leaks

5. MEECO'S RED DEVIL 610 Refractory Cement - Indoor Use Only

• Pre-mixed, fiber-reinforced, high temperature silicate mortar
• Withstands working temperatures up to 3000-degree f
• Not for outdoor use. made in the usa
• 1/2 gallon size, buff in color
• Use where thicker joints are required

6. CHIMNEYRX Brushable Chimney Crown Repair, 1 Gallon

• Covers approximately 40 square feet per gallon
• Easy to apply with a 3 inch or 4 inch paint brush, & cures in 2-4 hours
• Fast-setting, flexible coating that seals and protects chimney crown tops - repairs cracked chimney crowns and prevents chimney leaks
• Specifically formulated to repair and protect fireplace & chimney crowns from water intrusion
• Stops chimney water leaks & repairs chimney crown cracks

7. Rutland Products Black, 32 fl oz Furnace Cement

• Rated to withstand up to 2000 f (1090 c)
• Great cement for small repairs or big rebuilds, easy to use and clean up
• Smooth consistency cement bonds and seals metal to metal or metal to masonry joints
• Repair stove cracks and seals, reset firebrick, attach your stove collar, glue ceramic logs

8. CHIMNEYRX Masonry Chimney Water Repellent, 1 Gallon

• Dries completely clear - doesn't alter surface appearance
• Long lasting water repellent prevents water penetration in masonry chimneys
• Water-based & environmentally friendly
• Easy to use - simply spray on with a pump sprayer
• Keeps masonry looking new / prevents deterioration caused by water

9. ChimneyRx Masonry Fireplace Crack & Joint Sealant - 1 Pint

• When applied to a properly prepared wall or chimney surface, crack & joint sealant can solve tough leak problems without the expense of truck pointing or surface grouting
• Brushable elastomeric sealant for mortar joints used to repair exterior cracks in mortar on chimneys, brick walls and between concrete or stone masonry units
• It dries to a clear, translucent, milky film
• The product seals larger cracks and other defects that cannot be corrected with water repellents alone
• Crack & joint sealant seals crack up to 1/8" wide on brick faces and at mortar and brick joint interfaces to provide waterproof protection

10. MEECO'S RED DEVIL 121 Furnace Cement and Fireplace Mortar

• Designed for patching or repairing cracked or chipped firebrick and mortar
• Withstands working temperatures up to 2,000-degrees f
• Pre-mixed, ready-to-use, high-temperature cement/mortar
• Made in the usa
• Gray in color