3M general purpose glass cloth tape 3615 is a general purpose, easy unwind tape coated with a silicone adhesive. It is ideally suited for many applications requiring high adhesion and high temperature resistance. With a very strong, abrasion-resistant backing this tape performs exceptionally well in a many situations and environments. - Permanent sealing of high temperature ducts or chambers. Back up strip for submerged arc welding. General splicing, seaming and sealing applications. Bundling, holding and harness wrapping applications.