3M™ Foil Tape 3340, Silver, 2 1/2 in x 50 yd, 3.9 mil, 20 rolls per case Min Qty Order:20 3M SKU: 7010412150

3M SKU: 7010412150

Fullflex heavy paper backing provides durability and smooth operation in either direction

3M SKU: 7000045881

3M SKU: 7010486295

extensible kraft paper liner for ease of processing

3M™ Foil Tape 3340, Silver, 2 1/2 in x 50 yd, 3.9 mil, 20 rolls per case Min Qty Order:20 3M SKU: 70104121503M SKU: 7100189974 Lead Time: ~2 days The 3M Foil Tape 3340 is ideal for sealing rigid fiberglass duct boards and flexible air duct systems. Our tape meets requirements for UL 181 A P and UL 181 B FX Listings as a measure of reliability and quality standards. 2. 0 mil aluminum foil backing is ideal as a vapor seal tape for duct closure. Listed for both UL181A P and UL181B FX. Permanent acrylic adhesive combined with the durable 2. 0 mil backing