For heavy-duty jobs, don"t settle for a weak or ineffective tape--this high performance packaging tape promises not to let you down. The polypropylene backed tape is reinforced with continuous glass yarn helping to make it very strong--with up to 380 lbs. per inch tensile strength. It provides an excellent resistance to nicks, abrasion and moisture. Plus, it utilizes a natural rubber adhesive, producing an ideal combination and balance of adhesion and high shear strength. With the Scotchpar™ polyester film backing, it"s moisture-, abrasion- and curl-resistant. Tape Type: Packaging; Adhesive Material: Natural Rubber.