3M 4411N/35 Scotch 4411 Extreme Sealing Tape: 3" x 15 ft, Translucent Core: 3 inch diameter Backing/carrier: ionomer film Adhesive: acrylic Release liner: Translucent polyester film Thickness: 42 mils (carrier, adhesive, liner) 40 mils (carrier, adhesive) 36 mils (adhesive)