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Black Fireplace Mortar 10.3 Fluid Ounce
Black fireplace mortar can 
be used to seal the appearing 
cracks on your refractory of the 
Free shipping|In Stock
Buff Fireplace Mortar 10.3 Fluid Ounce
Want to give your fireplace 
refractory a new look without ordering 
a new one? Use the buff 
Free shipping|In Stock
Gray Fireplace Mortar 10.3 Fluid Ounce
Can be used to seal around a 
fireplace door to achieve the built-in 
look. Gray fireplace mortar wil... 
Free shipping|In Stock
Furnace Cement Black 10 Ounces
Great product to install or 
reset stoves, inserts, furnaces 
and other heating appliances. It 
seals ... 
Free shipping|In Stock
Hi-Temp Black Silicone Sealant 10.1 Fluid...
Seal your fireplace, chimney 
and more with this high 
temperature 10.1 fluid ounce black 
silicone se... 
Free shipping|In Stock
High Strength Clear Silicone Sealant 10.3...
High strength silicone and 
adhesive that will bond to metal, 
glass, ceramic, wood and many other 
Free shipping|In Stock
Clear Multi Surface Silicone Sealant 10.3...
Excellent Adhesion - Stays 
Permanent Flexible. - 400°F - 10.3oz. 
VOC-Compliant - Waterproof. Mult... 
Free shipping|In Stock
M230 High-Temp Stove Bright Sealant
Excellent for sealing 
firebox and venting joints of gas, 
pellet, corn, and wood stoves. M230 
is als... 
Free shipping|In Stock
Gelco Chimney Top Adhesive 10.5 Fluid Ounce
A great adhesive to help 
secure your chimney cap to your 
flue. Move from VOC and the 
application te... 
Free shipping|In Stock
High Temperature Fire Putty Cement
High temperature fire putty 
cement - perfect for fixing and 
repairing your fire brick in your 
Starting at:
Free shipping|In Stock
Heat Stop II Dry Mix Refractory Cement 1 ...
Use to adhere clay flue 
tiles or repair your refractory on 
your fireplace, wood stove, bake 
oven, k... 
Free shipping|In Stock
25 Pounds Super 3000 Premium Refractory C...
This refactory cement will 
withstand temperatures up to 3000°F! 
It is great for fireplace 
Free shipping|Out of stock
Black Furnace Cement AWP#40
Furnace Cement Black - Case Of 12
Contractor Pack. Furnace 
cement seals air and gas leaks in 
all types of stoves and 
furnaces. Bonds ... 
Free shipping|In Stock
55 Pounds Super 3000 Premium Refractory C...
Refractory cement that 
withstands temperatures up to 3000 
degrees! Great for fireplace repair! 
Starting at:
Free shipping|In Stock
Fireplace Cement Package
Bring that fireplace back to 
life with this Fireplace Cement 
Package from A.W. Perkins. Free 
Free shipping|In Stock
M230 High-Temp Stove Bright Sealant - Cas...
M230 is an effective door 
gasket adhesive available in bulk. 
Excellent for sealing firebox and 
Free shipping|In Stock

Mortar and Adhesives

Fireplace Doors Online offers high heat mortar mix and high-temperature silicone adhesives for all your stove and fireplace repair needs! These products are tried and proven to deliver incredible performance!

Our mortars can withstand intense heat up to 2000° F! Best used for filling in joints and flaws that have formed over the years between the bricks on your fireplace. For a DIY task that requires you to pour castable fire brick, we have a terrific refractory cement that will get the job done right!

Our adhesives are great for gasket and glass installations. They are NSF approved and adapt to many substrate surfaces. All of these mortars and adhesives are quick curing, durable, simple to use, and low odor products! 

Silicone & Caulking Tips: DIY like a Pro!

  1. This cartridge fits into a standard caulking gun. For clean application, cut the cartridge tip near the end, at approximately 45-degree angle.

  2. The surface must be clean, dry, and free of debris. Have some damp rags or a roll of paper towels within reach. Put down newspaper in case of carpet drip.

  3. To lay a professional bead, hold the caulking gun at approximately 45 degrees. Spin the cartridge tube so the longest part of your tip is on the top side of the gun.

  4. Now gently squeeze the gun just a bit, and begin to drag a bead starting at the highest point. Only squeeze the gun if your bead is too small. Find a rhythm :)

  5. For a clean job, when laying a bead, "A little dab will do ya!" You can always go back and add more silicone.

  6. After applying and working the silicone, let it cure for at least 30 minutes (at room temperature) before using your appliance.