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Foil, Film & Foam Tapes

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.

Where To Buy Data Sheet

Features & Applications

  • 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
    • SF 685

    Specifications

    Learn more about SF 685 in depth by exploring all of its features and uses. You can also visit TapeUniversity.com to learn more about choosing and using tapes.

    Markets

  • Building & Construction - HVAC/Insulation
  • Specialty - Made in USA

    • Construction

    Backing: Printed, 2 mil aluminum foil

    Adhesive: Non-flammable, butyl rubber adhesive

    Liner: NA

    Properties & Technical Data

    Product Nomenclature: SF 685
    PropertyStandardMetric
    Adhesion to Stainless Steel255 oz/in width27.91 N/10 mm
    Application Temperature Range35 F to 110 F1.7 C to 44 C
    Elongation560%560%
    Service Temperature Range-20 F to 200 F-29 C to 93 C
    Tensile25 lbs/in width43.8 N/10 mm
    Thickness17.0 mils0.43 mm
    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.

    Downloads

    Technical Data Sheet
    Sales Sheet
    Safety Data Sheet
    Infographic
    Regulatory Compliance Letter
    HVAC Pro Guide

    Sizes & Colors

    Colors Available: Silver Printed (SPT)

    Lengths Available: 100 ft

    Widths Available: 2 in, 3 in

    Sizes and colors disclaimer: Lead times may apply. Please contact Shurtape customer service for information related to stock and non-stock sizes and colors.

    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.

    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

    Related Products

    SF 686

    SF 686 UL 181B-FX Listed/Printed ShurMASTIC® Butyl Foil Tape

    UL 181B-FX Listed and printed ShurMASTIC® indoor/outdoor roll mastic tape.

    Where to Buy

    Shurtape Foil, Film & Foam Tapes products are available both online and at retailers nationwide. Check our Where to Buy page for more information on purchasing Shurtape products both locally and online.

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