Gray Fireplace Mortar 10.3 Fluid Ounce

In Stock 
Gray Fireplace Mortar

Not for exterior use, and should be applied 1/16 - 1/8" thick!


List price: $15.99
Get 6 months to pay on purchases of $99 or more with PayPal credit!

Fireplace mortar patches cracked or chipped firebrick and can also be used to fill in missing mortar joints. You can fire it immediately. First burn a low fire to dry fireplace mortar, then heat strongly to cure.The final cure requires 1200 Degrees to strengthen the mortar to firebrick hardness. Can also be used on any wood burning stove as well. 2000 Degree limit. Don’t use mortar outdoors for firebrick repair. Ideal for holes or cracks not wider than 1/8". Fill larger joints in layers. The mortar will dry as hard as firebrick if it is properly cured and will withstand 2000°F!

Click here to learn some DIY caulking tips.


  • Material: Adhesive Caulk
  • Color: Gray
  • Size: 10.3 fl oz
  • Safety Standards: ASTM E136 and E72

In-stock products will ship within one week.

No posts found

Write a review

Please feel free to contact us if you have any questions or need more information about this product using the New Question tab. Please ONLY SUBMIT product questions. For all other questions go to contact us,

Last updated on July 26th 2018.