3M™ 2-1/2"x24" Butyl Mastic Tape - Black

The 3M? Butyl Mastic Tape is a high tack, self-fusing butyl rubber mastic ideal for making water and humidity resistant seals. It can be overwrapped with vinyl tape to create a reliable weatherproof seal around cable connections and other weather-sensitive devices. This mastic tape in black has excellent adhesion to cable jackets and other insulating materials, maintaining its tack and flexibility over a wide range of temperatures.