Polyken® 338 FSK Insulation Tape features a diamond pattern foil/scrim/kraft backing with a synthetic rubber adhesive and Kraft paper release liner. Use to create an extra strength seal or patch to maintain vapor barrier integrity in FSK duct boards and blankets. It is specially designed to meet high strength, tear resistant sealing tape requirements.
Tested in accordance with UL 723
Adheres in a wide range of temperatures
Diamond pattern matches most FSK boards and blankets