Tartan™ Box Sealing Tape 369 is a general purpose packing tape ideal for non-critical box sealing applications. The polypropylene film backing is easy to unwind and resists abrasion, moisture and scuffing. The backing easily conforms around edges and on rough surfaces for a tight seal. - Bi-axially oriented polypropylene film backing withstands nicks, abrasions and moisture for long-lasting performance. Closes packages securely without the holes, waste, sharp points and disposal of staples Suitable for use on lightweight envelopes and mailers.