Almost everyone has a Duck Tape story to tell, usually praising its remarkable strength and versatility. Duck Brand Metal Repair Aluminum Foil Tape has a wide range of applications, both traditional and nontraditional, making it even more useful than ever! Because of its strength and adhesive properties, Duck Brand flex foil tape combines both the excellent sealing and protective benefits of aluminum with the superior adhesion of Duck Brand Duct Tape. This UL181A-P listed silver adhesive tape is approved for use on metal air ducts and is rated for flame spreads and smoke development. For use with a temperature range of -20 to +200-Degree (Fahrenheit), the flex foil tape has application characteristics and ease of handling similar to pressure-sensitive tapes. Metal Repair Aluminum Foil Tape is suitable for indoor or outdoor use and is ideal for sealing both cold and hot air ducts. Each roll of Duck Brand Metal Repair Aluminum Foil Tape is 1.88 inches wide x 50 yards long. Duck Tape is great for any repair - anywhere.