Multi-purpose extra-strength energy saving cloth. Multipurpose. Use on heating and air conditioning ducts and much more. Airtight and waterproof. Silver. 10 mil (thousandth of an inch) thick.

• Extra Heavy Duty Duct Tape designed for permanent and critical repairs
• Super strong but still easy to tear
• Works on a variety of surfaces including both rough and smooth
• Designed to conform to irregular surfaces
• Moisture resistant