Description 2 x 55 yds. Clear 3M 371 Carton Sealing Tape. Super strong pressure sensitive polypropylene tape for economical, repetitive volume packaging. Industrial grade packaging tape. Perfect tape for box sealing, splicing and other packaging needs. Features a conformable backing and consistent adhesive system that will not peel, crack or dry out. Waterproof and weather proof. Reliable performance in a range of environments and applications. Polypropylene backing with hot melt rubber adhesive.