Berry Plastics 509W THREAD SEAL TAPE White, multi-purpose, 0n-adhesive thread seal tape Applications Unsintered virgin polytetraflouroethyl ene (PTFE) self lubricates joints, making them easy to assemble and disassemble for a leak proof seal. Product can also be used on a number of other maintenance type applications. Features & Benefits Easy to Assemble and disassesemble -Used on a wide variety of maintenance applications.