UL 181A Imprinted Foil Tape – 181A Series – 4.8 mil

Manufactured to comply with UL181A performance and identification requirements and assures against tape being conductor of any flames.

Acrylic adhesive

Broad Temperature Range: -20°F to 325°F


Our 181A Series Imprinted Foil Tape is a 2 mil (50 micron) heavy duty, high strength aluminum foil coated with a specially formulated pressure sensitive acrylic adhesive system. Superior adhesion and conformance for use with fiberglass duct board systems. Performance and materials guaranteed to meet or exceed UL-181A-P quality standards and assures against tape being a conductor of any flame.

Also meets UL-181B-FX standards.

Primarily used for vapor sealing fiberglass duct board.

Item # Roll Size Units / Case Case Size Case Weight
500525 2.5″ (60mm) x 60 yd 16 – Cello 12.25″ x 12.25″ x 10.75″ 38 lbs


Technical & Consumer Data

Physical Properties

Total Thickness: 4 mil
Adhesion: 61 oz/in
Shear: 5 lb. Weight 24 hours + 40°F / 6 hours –  10 lb. Weight > 120 hours + 73.4°F / 120 hours – 1 lb. Weight > 6 hours + 150°F / 6 hours
Flame Spread Rate: 25
Tensile Strength: 32 lbs/in

Physical characteristics shown are averages from tests recommended by our own procedures. A particular roll may vary slightly from these averages. The buyer should determine the suitability for his own use.


Technical Data Sheet

Safety Data Sheet

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