20X stronger than acrylic tapes (in sheer holding adhesion power compared to acrylic tapes based on ASTM D3654). Scotch Brand's strongest clear-to-core tape is ideal for shipping heavy packages. Value Pack--Stock up and Save! Tape Type: Packaging; Adhesive Material: Synthetic Rubber; Hot Melt; Width: 1.88"; Thickness: 3.1 mil.