- Permanent air - tight moisture - proof seal. Founctions from - 50°C to +260°C. - Insulates to 8000 Volts (per unstretched layer). Is a self - bonding silicone insulating & repair tape. It resists to extremes temperature, pressure, voltage, salt - water, U.V rays, acids, moisture and corrosion. - Begins to fuse immediately, with a permanent, cohesive bond within 24 hours. Re - positioning is not recommended after 1 - 2 minutes of wrapping.