YNAK Seam Tape This is seam tape for repairing tents, backpacks, tarps, and rainwear. Width: 35mm Manufacturer's Description: Polyurethane, iron-on, transparent seam tape / Suitable for PVC and urethane-coated fabrics. Can be used for repairing tents, backpacks, sheets, rainwear, etc., and for preventing water leakage from seams. This tape can be used on PU-coated/PVC-coated fabrics such as tent linings and 2-layer rainwear. For 3-layer rainwear, use tricot tape, and for 2.5-layer rainwear, use 2.5-layer specific tape.