The 3M Foil Tape 433 is a 2" wide pressure-sensitive aluminum foil tape with acrylic adhesive that bonds well to most clean and dry surfaces. It has a thickness of 3.6 mils and can withstand temperatures up to 250°F. This tape provides excellent reflection of heat, light, and sound. It also offers corrosion and moisture resistance. The 3M Foil Tape 433 can be used for HVAC duct sealing, joining sheet metal, masking, wrapping and general repair. It meets UL 723 and is made in the USA.