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SF 685

ShurMASTIC® butyl foil tape for indoor or outdoor use to seal Class 1 Flex Duct, sheet metal and duct wrap vapor barriers, and is also approved for subgrade application on PVC-coated duct. SF 685 is a linered, paintable foil mastic on a roll that's tested in accordance with UL 723 and delivers permanent, airtight and water-resistant seals in temperatures up to 200 F.

  • Indoor/outdoor mastic foil tape 
  • Linered 
  • Stays supple and forms a permanent bond to substrate 
  • Paintable with paint recommended for aluminum 
  • Contains no asbestos, CFCs or PCBs
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Physical Properties

Property Type Property Standard Property Metric ASTM Test Method
Tensile 25 lbs/in width 43.8 N/10 mm D 3759 & D 3759M
Adhesion to Stainless Steel 255 oz/in width 27.91 N/10 mm D 3330 & D 3330M
Thickness 17 mils 0.43 mm D 3652 & D 3652M
Elongation 560% 560% D 3759 & D 3759M
Service Temperature Min -20 F -29 C
Service Temperature Max 200 F 93 C
Application Temperature Min 35 F 1.7 C
Application Temperature Max 110 F 44 C

TYPICAL APPLICATIONS

For indoor or outdoor use to seal Class 1 Flex Duct, sheet metal and duct wrap vapor barriers; Also approved for subgrade application on PVC-coated duct.

Sizes and Colors Available

Dimensions
Rolls per case
Weight lbs/case
Cases per pallet
Available colors
Dimensions:
2in x 100ft
Rolls Per Case:
24
Weight lbs/case:
63.8
Cases Per Pallet:
36
Available Colors:
SPT
Dimensions:
3in x 100ft
Rolls Per Case:
16
Weight lbs/case:
66.0
Cases Per Pallet:
36
Available Colors:
SPT

Physical Properties

Property Type Property Standard Property Metric ASTM Test Method
Tensile 25 lbs/in width 43.8 N/10 mm D 3759 & D 3759M
Adhesion to Stainless Steel 255 oz/in width 27.91 N/10 mm D 3330 & D 3330M
Thickness 17 mils 0.43 mm D 3652 & D 3652M
Elongation 560% 560% D 3759 & D 3759M
Service Temperature Min -20 F -29 C
Service Temperature Max 200 F 93 C
Application Temperature Min 35 F 1.7 C
Application Temperature Max 110 F 44 C

Markets/Applications

TYPICAL APPLICATIONS

For indoor or outdoor use to seal Class 1 Flex Duct, sheet metal and duct wrap vapor barriers; Also approved for subgrade application on PVC-coated duct.

Sizes & Colors

Sizes and Colors Available
Dimensions:
2in x 100ft
Rolls Per Case:
24
Weight lbs/case:
63.8
Cases Per Pallet:
36
Available Colors:
SPT
Dimensions:
3in x 100ft
Rolls Per Case:
16
Weight lbs/case:
66.0
Cases Per Pallet:
36
Available Colors:
SPT