Dr. Shrinks Heat Shrink Tape is a 9-mil backed tape with no UV inhibitors. Heat shrink tape is designed to tape seams, patch holes and secure zipper access doors. Dr. Shrinks Heat Shrink Tape is available in white, blue and clear. The DS-704BP Heat Shrink Tape is blue in color and comes in a 4" x 180 roll. It features a pinked edge.