HeatShield Facts

If you have an older masonry chimney with a clay tile flue liner, you will be interested in learning more about HeatShield, a revolutionary product we use at Fireplace Service Company to repair and reline clay chimney liners. Our Chimney Safety Institute of America (CSIA)-certified chimney sweeps have been using this cerfractory flue sealant for years and have been very happy with its results. Our customers have also been pleased with HeatShield as well because it is a very economical way to restore clay tile flue liners. If your chimney liner is cracked or is missing tiles, it should be repaired as your liner is essential to your chimney working safely and properly. We would like to tell you how well this product works by sharing with you facts about it from its manufacturer’s website, CeCure Chimney Systems.


What exactly is HeatShield?

A specially formulated cerfractory sealant material developed in Europe over 20 years ago, HeatShield restores the ability of your chimney to vent toxic flue gases from your home. Not only does it repair cracks and gaps in your chimney liner, this sealant also prevents this type of damage from spalling and age for years to come. The repair system comes in two different types. The joint repair system is used to repair defective mortar joints. The resurfacing system is used to repair liners that are cracked or spalled but otherwise sound.

How durable is HeatShield?

Proven to withstand moisture, corrosion from flue gases, and temperatures over 2900 degrees Fahrenheit, HeatShield has been rated a “Super-Duty” refractory mortar per the American Society for Testing and Materials (ASTM). This surpasses the required rating recommended by the National Fire Prevention Association (NFPA) and the International Residential Code (IRC). Both of these organizations require only a “Medium-Duty” refractory mortar for use in fireplaces and chimneys.

What kind of experience do the technicians at Fireplace Service Company have in using HeatShield?

Not only have our technicians been successfully applying HeatShield to the chimneys of our customers for years, but the company itself also provides training in using this flue sealant. During this training, our technicians also receive special tools that they use to apply this formula.

What are other benefits of HeatShield?

An environmentally friendly product, HeatShield is manufactured from recycled and naturally occurring materials. HeatShield is also more economical than having to rebuild your chimney due to a damaged clay liner and removing damaged clay flue tiles before repairing them. Additionally, this product comes with a 20-year limited material warranty.

If you suspect the clay tile liner in your masonry chimney needs repairing, contact Fireplace Service Company. We can inspect the condition of your clay tile flue liner and tell you about your options with HeatShield.

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