Easily cover rubber electrical splices with Duck Brand Friction Tape. This traditional 15-mil cotton cloth tape has a rubber-based adhesive that makes it a strong cover for wiring, or even for wrapping hockey sticks, baseball bats or garden tools to increase grip. This black tape comes in a 3/4-inch by 60 foot roll. If you're tackling a DIY project at home, Duck Brand has many useful DIY products that will help you get the job done.