Additional InformationSupaflu® is the poured chimney flue lining system for masonry chimneys that utilizes the innovative and unique process for lining masonry chimneys know as the "cast-in-place" technique. It consists of a factory blend of proprietary cast-in-place aggregates . The System is based on a concept which originated in Europe over 50 years ago and has been in use throughout the United States and Canada since the late 1970's . The chimney lining is poured and cast in place within the existing masonry chimney. With the use of modern equipment, technology, and installation methods, the Supaflu liner installation is a reliable and practical alternative to tearing down the chimney. Supaflu is light weight, insulating, cementitious material designed to withstand high service temperatures.