EnerSeal Nano Seal Technology Heavy Duty Tape is a 4 inch wide tape with a 50 foot roll. It is designed to seal and repair leaks in pipes, ducts, and other applications. The tape is made with a heavy duty fleece material that is designed to withstand extreme temperatures and pressure. It is also designed to be UV resistant and water resistant. The tape is easy to use and can be applied to a variety of surfaces.