WarriorWrap WW-MSR-375 Gray Mastic Insulating and Sealing Tape is strong enough for professional environments and gets the job done right the first time, every time. This tape is 5mil thick, 3.75 inch wide, 10ft long and is made from temperature-stable materials. The self-amalgamating design conforms to irregular shapes with a mastic adhesive that forms a secure and moisture-resistant bond for outdoor use. WarriorWrap is an excellent choice for the insulating and moisture sealing splices and terminations of solid dielectric cable or ductwork in outdoor environments, especially when jacketed with vinyl tape.