Black Self Fusing Silicone Tape for Sealing and Repairs Plymouth BISHOP Tape is self-fusing with new silicone technology Fuses in SECONDS compared to older style silicon Tape Aviation quality - Meets and exceeds Mil Specs Triangular Guideline style tape designed for aviation use Insulates 8,000 volts per layer, 950 PSI Tensile Strength, 500F heat resistance.