null DuraFlexSS 24'' x 25' x 1/2" ProFoil Insulation for 7" - 020713
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DuraFlexSS 24'' x 25' x 1/2'' ProFoil Insulation for 7''- 7RNPFB24X25

DuraFlexSS 24'' x 25' x 1/2'' ProFoil Insulation for 7''- 7RNPFB24X25
In Stock: Ships in 3 to 4 weeks


Use as insulator for stainless steel liners in masonry chimneys. All DuraFlex products must be insulated to meet UL 1777 requirements.

DuraFlex SS flexible relining is designed for masonry chimneys and for use with gas, wood pellet, oil, or wood appliances; Including fireplace inserts, furnaces, boilers, and water heaters.

Required to insulate stainless steel liner to meet UL 1777 when proper clearance to chimney and framing are not available.

A 1" clearance from stainless steel liner to interior wall of the masonry chimney and 1" clearance from the masonry to the house framing are required in order to meet UL 1777. If you only meet one of these clearances a 1/4" wrap of insulation is required. If you do not have either of these clearances then a 1/2" wrap or 2 wraps of 1/4" insulation are required. If these two clearances are available then no insulation is needed. AluFoil and ProMesh required.

Additional Information:

DuraFlex SS relining systems ensure safe and efficient venting of heating appliances while protecting the masonry chimney from the damaging effects of flue product condensation. DuraFlex is available in 304 and 316Ti stainless steel. The 304 and 316Ti SS are designed for use with pellet, non-condensing gas, and oil appliances. DuraFlex SS and 316Ti SS, when used with the Simpson DuraVent Two-Ply Insulation Sleeve, may be used for relining wood burning fireplace inserts and stoves to meet UL 1777 and ULC S635 standards with 0" clearance to masonry.

Adobe PDF Icon  Installation Instructions

California Proposition 65 Warning SymbolWARNING: This product can expose you to chemicals including Chromium, which is known to the State Of California to cause cancer and birth defects or other reproductive harmFor more information go to

  • Dimensions: 7" Diameter x 24" Wide x 25' Long x 1/2" Thick
  • Clearances: 0" to Masonry
  • Listings: UL Listed to UL1777

Additional Information

Clearance Non-Clearance
Country Of Origin United States
Type Chimney Liner Pipe
Diameter 6 Inch
Diameter 5 Inch
Product Type Chimney Pipe
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Brand DuraFlex SS


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