Not all packaging tape is made the same, with different tapes offering varying levels of adhesion. Scotch® Heavy Duty Shipping Packaging Tape holds strong on all box types, including 100% recycled boxes — a common culprit for poor case containment. This is thanks to a strong, tough, solvent-free hot melt adhesive that locks in contents and locks out everything else. Use the tape that's guaranteed to stay sealed and choose Scotch® Heavy Duty Shipping Packaging Tape.