Scotch Heavy Duty Shipping Packaging Tape is even guaranteed to stay sealed.* The strong, tough, solvent-free hot melt adhesive locks in your heavy-duty solvent-free 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.