Now even the heaviest packages can withstand rough handling. This tape holds strong on all box types, including 100% recycled boxes. It's even guaranteed to stay sealed. The strong, tough, solvent-free hot melt adhesive locks in your heavy duty contents and locks out everything else. • Guaranteed to stay sealed. • Provides excellent holding power for heavy-duty packaging and shipping. • Strong seal on all box types, including hard-to-stick-to 100% recycled boxes. • Strong, durable solvent-free hot melt adhesive seals and protects. • Seals seams with one strip so boxes stay closed. Now even the heaviest packages can withstand rough handling. Our Scotch® Heavy Duty Shipping Packaging Tape holds strong on all box types, including 100% recycled boxes. It's even guaranteed to stay sealed. The strong, tough, solvent-free hot melt adhesive locks in your heavy duty contents and locks out everything else. Meets US Postal Regulations for standard packages. Refill Rolls. Grade: Heavy-Duty; Core Size: 3"; Dispenser Included: No; Adhesive Material: Hot Melt Synthetic Rubber.