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In addition to being built differently than other tapes, most electrical tapes used by professionals are UL Listed, which means that they have been vigorously tested for performance when exposed to environmental elements, such as cold temperature, moisture, and sunlight. UL Listed electrical tapes are also tested for physical properties, including backing strength, elongation, and adhesive strength and must meet a high standard in order to qualify for the listing. UL Listings exist for many other types of tape – such as foil and film HVAC tapes – but each listing revolves around the specific type of tape in question. So, while your foil tape may meet UL Listing requirements for sealing rigid ducts in HVAC applications, it would not meet the code if used in an electrical application.

Polyethylene film tape (63535) is a 7-mil thick tape coated on one side with a synthetic rubber adhesive. This particular tape is UV-resistant and can form a water-tight seal, making it a good tape for outdoor use. It is designed to be able to mask windows and doors in stucco fabrication and other construction applications. This tape is available in white or red. Available widths range from 2 inches (48 millimeters) to 44 inches (1,118 millimeters).