3M™ Scotch® Foil Tape 3311 is an aluminum alloy foil tape with a pressure-sensitive rubber adhesive and paper liner designed for sealing insulation, duct systems, and general repair applications.
With a total thickness of 3.6 mil (0.09 mm), it provides a highly conformable backing that adheres well to irregular surfaces while maintaining a strong vapor barrier.
This tape offers excellent resistance to water vapor, smoke, and odor transmission, making it ideal for maintaining the integrity of insulation systems and HVAC applications.