SF 685
ShurMASTIC® Butyl Foil Tape
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.
SF 685
ShurMASTIC® Butyl Foil Tape
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
Technical data for SF 685
Sizes & Colors
Colors Available
| Standard Widths | 1.88 in, 2.83 in 48 mm, 72 mm |
|---|---|
| Standard Lengths | 100 ft 30.48 m |
Construction
| Adhesive | Non-flammable, butyl rubber adhesive |
|---|---|
| Backing | Printed, 2 mil aluminum foil |
Applicable Standards
| FSI 20/SDI 40 |
| Pressure Classes SMACNA 1/2, 1, 2, 3, 4 & 6 |
| Seal Classes A, B, C |
| Tested in accordance with UL 723 |
Properties
| Application Temperature Max | 110 F 44 C |
|---|---|
| Adhesion to Stainless Steel | 255 oz/in width 27.91 N/10 mm |
| Application Temperature Min | 35 F 1.7 C |
| Elongation | 560% 560% |
| Standard Core Size | 3 in |
| Service Temperature Max | 200 F 93 C |
| Service Temperature Min | -20 F -29 C |
| Tensile | 25 lbs/in width 43.8 N/10 mm |
| Thickness | 17.0 mils 0.43 mm |
Storage & Usage Conditions
Tape should be stored in its original packaging in a cool, dry area away from direct sunlight and should be used within 12 months of date of shipment. Surfaces to which tape is applied should be clean, dry and free of grease, oil or other contaminants.
Physical and performance characteristics shown above are obtained from tests recommended by PSTC, ASTM, government agencies or Shurtape Technologies, LLC, Quality Assurance and Technical Service departments and do not represent a guarantee of product performance. Individual rolls may vary slightly from these averages. The user should determine whether the product is fit for a particular purpose and is suitable for the user’s method of application before use.
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