Heavy Flex Liner Kits

DuraFlex Pro is a highly flexible and strong steel liner option, boasting 20% more stainless steel per foot than competitors. Its unparalleled flexibility allows for easy installation even in situations requiring multiple offsets. It is available in lengths, kits, and custom lengths with diameters ranging from 3" to 12". The liner is made with 316 Stainless Steel, which is highly resistant to corrosion. Additionally, it is listed to UL 1777 and ULC S635 standards.

The DuraFlex Pro is an ultra-flexible relining option for masonry chimneys that can be used in conjunction with gas, wood pellet, oil, or wood appliances. It is suitable for use with fireplace inserts, furnaces, boilers, and water heaters. The product is constructed from single-wall .005″ 316 stainless steel, and features 0″ clearance for gas, oil, and pellet applications. For wood-burning applications, a 1″ clearance to masonry is required. If 0″ clearance to masonry is required for wood-burning applications, insulation must be utilized.