Thermocrete of Southern California
first introduced Thermocrete Ceramic Flue Sealant to Southern California in the year 2000.  Since then, we have successfully restored thousands of chimneys. 

This is the ONLY product on the market that has approval by Warnoch Hersey (the testing laboratory for the fireplace industry) and also complies with applicable sections of UL 1777-1996 “Standard for Chimney Liners”.  The City of Los Angeles Building and Safety has approved the product for repairing or restoration of smoke chambers and flue systems of existing code-complying masonry and precast concrete chimneys. (Research Report #25455).   Your local building and safety department has also given their approval. 

Thermocrete CFS only reduces the flue size very slightly therefore maintaining the important draft qualities of your fireplace or heating system.

All other methods reduce the size of your flue substantially and a smoky and smelly fireplace is a common result.