SmartFlex Stainless Steel Liners

The PREFERRED CHOICE of Professional Chimney Technicians!

SmartFlex Liner can be used to reline existing chimneys or in new construction. It is an all fuel liner and can be used for wood, coal, oil, corn and gas appliances. This flexible liner features corrugated construction allowing it to both expand and contract during heat up and cool down periods. 

SmartFlex Liner is UL listed by Underwriter Laboratories to UL 1777, 64, 441 standards for insulation, and has an available Lifetime Transferable Warranty. 

This liner is made from the highest grade, mill certified, .006" thick, 316L stainless steel. A continuous strip of 7-ply stainless steel that  is interlocked and crimped to produce a gas and watertight lining system creates the most superior and durable lining system on the market.

Venting an appliance? Check out our wide selection of 

Liner Opening to Fireplace Opening (square inches) Ratio for Flue Liners:

Round Liner 12 : 1