By Dave from NJ on October 9, 2014
The refractory panel in the back of my fireplace is cracked as well as the base. Can this product be used to fix these cracks?
By eFireplaceStore on October 9, 2014
This sealant will not work well for your purpose. Instead, the Rutland Masonry Fireplace Patch - 1.5 Pound Tub
should be used. Please keep in mind that this will only be a temporary fix, as the panels will likely continue to degrade and will eventually require complete replacement.
By Ed Simon from Maryland on January 23, 2012
I need to caulk around my fireplace doors. The mortar keeps falling out. The gap between the metal door and the limestone is about a 1/4". Will this product work and does it come in different colors? The limestone is a sand color.
I believe the metal door expands and cracks the mortar joint so something flexible like high temp caulk may work.
By Kevin E. - Fireplace Specialist on January 24, 2012
For a gap this large, a gasket and cement combination may be a better solution. The gasket material will work to fill the gap and the cement will absorb the flex of the door kit. Please follow the below links to view these products.
(also available in other diameters)
(unfortunately, only available in black)
By Albert from Flower Mound, TX on September 23, 2013
Will this work for an exterior fireplace against metal and masonry?
By Collin C. - NFI Master Hearth Professional on September 24, 2013
Answer:This product can indeed be used to seal exterior joints, as long as they are not exposed to a temperature greater than 550 degrees. This RTV sealant can indeed be used to bridge masonry to metal joints.
By Fred from Vermont on October 4, 2013
How long does this sealant take to cure, and how soon after a stove is rebuilt can we start to burn wood?
By Collin C. - NFI Master Hearth Professional on October 4, 2013
This item takes approximately 24 hours to cure and should not be subjected to heat within the first 72 hours.
Please keep in mind that this sealant will likely not have a high enough heat rating for a wood stove. If you are rebuilding a wood stove, Rutland Pre-Mixed Black Furnace Cement - 10.3 Ounce Cartridge
is the better product to use.
By D from Washington, DC on June 4, 2013
Can I use this to replace the gasket on the glass for my gas fireplace?
By Tyler M. - NFI Certified Specialist on June 4, 2013
By Brandon from WV on November 26, 2015
How long will it take for the smell of this Rutland high-temperature RTV black silicone sealant to go away on a wood stove single-wall stove pipe?
By eFireplaceStore on November 27, 2015
Typically, RTV is not utilized at the joints on a wood burning venting system. The venting system can easily exceed the working temperatures of RTV, causing the product to emit a strong acrid odor that will not diminish for quite some time. Instead, a product like the Rutland Pre-Mixed Black Furnace Cement - 10.3 Ounce Cartridge
should be used. It is usually only needed at critical points, such as where the stovepipe meets the appliance and at the transition to the Class A chimney.