Nashua 367-17 FoilMastic Butyl Rubber Sealant Tape: 2 in. x 100 ft. (Silver)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Core: 3 inch diameter</li><li>Backing/Carrier: 2 mil aluminum foil - printed</li><li>Adhesive: butyl rubber</li><li>Release Liner: low density polyethylene (LDPE) film</li><li>Certifications: UL 181B-FX Listed; Pressure testing validated by SMACNA Testing &amp; Research Institute</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51KnqyTcRSL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31f9uMwn17L.jpg" noproxy>