3M™, 7100189974, Foil Tape, Series: 3340, 50 yd Length, 2.5 in Width, 3.9 mil Thickness, Silver, Acrylic Adhesive, Aluminum Foil Backing, 29 lb/in Tensile Strength, 300 deg F Maximum Operating

3M™ Foil Tape 3340 forms long-lasting, conformable sealing properties that improve the integrity of rigid fiberglass duct boards. Use this silver, 2.5 in wide, 3.9 mil thick tape along with conformable air ducts and connectors to enhance HVAC air systems maintenance. Tape 3340 is also designed for use in many automotive, electronics, metalworking, construction and aerospace industry applications. Reliability is assured with dual UL181A-P and UL181B-FX listings. You'll get a durable seal and excellent closure against vapor through hot and cold temperatures, enhanced by an aluminum foil backing. Reduce or eliminate mechanical fastener use, and improve heating and cooling efficiency with this long-lasting easy-to-apply tape with a permanent acrylic adhesive and convenient liner. 3M™ Foil Tape 3340 improves the efficiency, sealing, and thermal properties of air systems in many applications across a broad range of industrial applications.