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Thermafiber® Aluminum Foil & FSK Insulation Tape | Owens Corning Insulation
Owens Corning

Thermafiber® Aluminum Foil and FSK Tapes are engineered to provide a vapor seal between curtain wall mullions and FSP-faced FireSpan® curtain wall insulation or other foil-faced Thermafiber® insulation products. This tape helps keep foil-faced insulation sealed tightly, which helps block moisture and supports the overall thermal efficiency of the wall system. These FSK and aluminum foil insulation tapes are the ultimate in cold-weather tapes.

Aluminum Foil Tape: A strong, 2 mil aluminum insulation tape with a high-temperature adhesive, commonly used to seal and secure insulation joints for better thermal performance.

FSK Tape: A tough, fire-rated foil/scrim/kraft (FSK) tape used to seal foil-faced insulation, helping provide added strength and fire resistance to the insulation system.

Features:

  • Vapor Seal - Helps seal seams and edges of foil-faced insulation.
  • Adhesion in Varying Climates - Performs in hot, moderate, and cold weather.
  • Flexible Application - Conforms to irregular surfaces and corners.
  • Durable Protection - Resists weathering, mold, UV, and environmental exposure.
  • UL 723 classified - Tested for surface burning characteristics.
Download Product Data Sheet
Thermafiber aluminum foil installed on a section of wall

Specifications & Literature

When Life Safety Matters Most

Owens Corning® Thermafiber® is committed to providing solutions that help the commercial building professional confidently design, specify, and install durable perimeter fire containment systems for commercial structures.

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Technical Information

Standards, Codes Compliance

ASTM C 1136FSK Tape, Meets
UL File NumberR10984
U.S. Coast GuardAluminum Foil Tape (CGA #164.112/63/0) (CGA#164.112/121/WCL MED 0287)

Technical Data


ALUmINUM FOIL TAPE

FSK TAPE


IMPERIAL

METRIC

IMPERIAL

METRIC

Thickness3.2 mils (0.0032")0.08 mm5.5 mils (0.0065”)0.14 mm
180º Peel Adhesion - Peel (PSTC 1)51 oz/inch width5.6 N/cm66 oz/inch width18.3 N/2.5cm
Tensile (PSTC 31)21 lbs/inch width36.8 N/cm39 lbs/inch width68.3 N/cm
Elongation (PSTC 31)9%9%2%2%
Low Temperature Application-40°F-40°C-40°F-40°C
High Temperature Resistance260°F127°C240°F116°C
Emittance (ASTM C 1371)0.03–0.03-
WVTR (ASTM E 96 Proc. A)0.02 U.S. Perms–0.02 U.S. Perms–
Flame Spread (ASTM E 84)10101010
Smoke Developed (ASTM E 84)10101010

Applications

Thermafiber® Aluminum Foil and FSK Tapes seal joints where foil-faced mineral wool insulation meets framing or connects between panels in exterior commercial insulation wall systems. These fire-resistant insulation tapes perform in both cold and hot climates, making this foil tape for insulation ideal for high-rise buildings exposed to snow, wind, humidity, or changing seasonal conditions.

  • Accessories and Specialty
  • Walls

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