J.V. Converting AF12/SI650 JVCC AF12 Economy Aluminum Foil Tape: 6" x 50 yd, Silver Carrier/backing: aluminum foil. Adhesive: solvent-based acrylic Thickness: 2.8 mils (carrier, adhesive) 1.2 mils (carrier). elongation: 3 percent Adhesion: 73 ounces per inch (to stainless steel test panel). tensile strength: 10.3 pounds per inch (longitudinal) Service/operating temperature: -22F to 248F Release liner: paper