"Don't tell me what tough is...
We use Thermocrete on all our chimney work, it's simply the best."

Kenneth Testa ~ Co-Owner
All About Chimneys
Marblehead, MA

What is Ceramic Flue Sealant?

• Withstands extremely high temperatures
• Eliminates the need to downsize the flue substantially
• Keeps costs contained, even for multiple-flue chimneys
• Increases structural stability
• Withstands corrosive elements that damage many types of liners

Thermocrete Ceramic Flue Sealant is applied in a semi-liquid form, providing excellent adhesion to masonry surfaces, coating the entire interior surface of the flue, and filling small gaps in the masonry work with a fireproof seal. Multiple layers of the ceramic material are applied, forming a complete and durable chimney sealant, unsurpassed in the industry. {Click here to watch the movie.}

With our advanced spray technology, several layers of ceramic flue sealant are sprayed inside each flue. This coating seals all small holes and cracks, strengthens the chimney, flue or lining, and increases efficiency without making it significantly smaller.

This is important. The flue capacity must be sufficient to handle the volume of exhaust from the fireplace, stove or furnace. Reducing the flue size can result in smoke spilling into the home, or worse yet, allowing carbon monoxide to enter the home, a potentially lethal situation.

Thermocrete products were tested in 1999 by Warnock Hersey to the strict standards of UL 1777. Rigorous testing guarantees consistent product quality and durability.