Our Scotch Heavy-duty shipping packaging tape holds strong on all box types, including 100% recycled boxes. It's even assured to stay sealed. The strong, tough, solvent-free hot melt adhesive locks in your heavy-duty contents and locks out everything else. You don't need layers of tape to get the job done -just one strip at a time, so you save time. Your heavy packages can bear the weight and stay sealed through it all with Scotch heavy-duty packaging tape.