SmartFlex Stainless Steel Liner

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 SmartFlex Standard Liner Kits & SmartFlex Basic Liner Kits for a better value on 3" - 8" diameter stainless steel liners!


· Flexible- Flexible Design Allows for Easy Maneuvering on the Job Site

· All Fuel - Acid Resistant, All Fuel Lining System - Wood, Coal, Oil, Corn, Pellet & Gas Appliances

· Top Quality Material - Constructed with .006", 316L, Flexible, Stainless Steel

· Watertight - Gas & Watertight Lining System with Continuous Strip of 7-Ply Stainless Steel that Interlocks & Crimps

· Lifetime Warranty - Lifetime Transferable Warranty, Valid Only if Properly Installed/Maintained by a Chimney Professional.

· UL Listed - UL Listed by Underwriters Laboratories to UL 1777, ULC-S635, and 441 Standards for Insulation


Please note:

· Shipping - Liner is shipped on a pallet via freight line - fees may apply.

· 10-12” Lengths - 10" - 12" liner sold in 5' increments only, maximum length between couplers is 20'. All other sizes are cut to order per foot.

· Full Coil Discounts - Coils of 100' or more are eligible for a 10% discount, call for ordering!

· Ovalizing - Ovalizing available, $2.00 per foot. Ovalized liner can be easily damaged when shipped, contact us for details

Need technical assistance when installing or ordering your SmartFlex Stainless Steel Liner? Our qualified Sales Team can help. Give us a call today!

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

Round Liner 12 : 1

Oval Liner 10 : 1

Square Liner 10 : 1

Rectangle Liner 10 : 1

Pre-Calculated Round Liner Chart at 12 : 1 Ratio

Installation Instructions:

• Ovalizing Flexible Liners (PDF, 735KB )
• SmartFlex Installation Instructions(PDF, 798KB )

Sales Sheets:

• SmartFlex Brochure (PDF, 1.82MB )
• Relining Best Practices (PDF, 674KB )
• Home Safety- Chimney Relining for Gas Appliances (PDF, 1.0MB )
• Home Safety- Chimney Lining for Oil Fired Equipments (PDF, 581KB )
• Oil Sizing Chart (PDF, 122KB )
• SmartFlex Warranty (PDF, 668KB )