Line and protect with sprayed ceramic technology. Thermocrete® is a premium, durable ceramic liner for use in the repair, restoration and energy conversion of chimneys and chimney flues. Thermocrete seals holes and cracks, increases efficiency, and strengthens the chimney. Thermocrete makes it easy to retrofit chimneys for conversion to natural gas. Installation is quick, cost effective and environmentally friendly. And unlike traditional fuel conversion methods, Thermocrete requires no major construction and does not reduce the diameter of the flue.
Why Thermocrete®?
There are many benefits of choosing Thermocrete® Ceramic Flue Liner over a steel liner, including:
- Minimal intrusion for residents/tenants
- Significant cost savings
- Quick installation time
- Environmental compliance
- Resistance to corrosion from the elements
- Minimal downsizing of flue area
- Ceramics will not corrode like stainless steel.
- Impervious to acids, sulfurous emissions, chlorides and creosote
Thermocrete® was listed with Warnock Hersey in 1999, then relisted in 2011/2016 by Guardian Test Labs per ULC-S635.
Residential Use
Thermocrete® is a cost-effective, durable solution for repairing and restoring residential masonry chimneys. Applied as a spray-on ceramic coating by factory-trained professionals, Thermocrete® creates a seamless, heat-resistant barrier that seals cracks and joints, protects against corrosive fumes, and prevents creosote buildup — a leading cause of chimney fires. Its fast, mess-free installation and lifetime warranty make it a smart choice for homeowners and chimney professionals alike.
Thermocrete® outperforms traditional liners like terra cotta and stainless steel, offering unmatched durability, fire protection, and long-term savings on maintenance. Environmentally friendly and suitable for chimneys serving wood, gas, oil, or coal-burning appliances, Thermocrete® ensures safer, more efficient operation across all types of residential heating systems.
Commercial Use
Thermocrete® is an affordable, easy-to-install solution that has become the preferred choice for many commercial buildings. From apartment complexes and hospitals to hotels, office buildings, and even power generation plants, Thermocrete® delivers reliable performance across a wide range of structures. It’s designed to handle impressive commercial capabilities, accommodating heights up to 225 feet, square openings up to 4 feet by 4 feet, and diameters as large as 5 feet.
A commercial chimney with round sectional clay liners.
Before
After
A square commercial chimney
Before
After
Thermocrete® is suitable for virtually any commercial application built with brick and mortar or clay liners. Listed with Warnock Hersey in 1999 and relisted by Guardian Test Labs in 2012 to meet ULC-S635 standards, Thermocrete®’s advanced ceramic formula offers long-term durability. Unlike stainless steel, it will not corrode, and it stands strong against harsh elements like acids, sulfurous emissions, chlorides, and creosote.
Thermocrete® is exclusively available for professional use by factory-authorized chimney sweeps, repair technicians, and fireplace installers. We are always seeking to expand our network of Thermocrete® factory trained installers. If you are a skilled chimney professional who has found situations where other repair methods just won't work due to the configuration or size of the flue, contact us to learn more about how you can offer your customers the Thermocrete® solution.
