3M 70

Scotch Self-Fusing Silicone Rubber Electrical Tape 70 is a high-temperature, self-fusing inorganic silicone rubber tape for electrical insulation and protective overwrapping. It fuses to itself without a pressure-sensitive adhesive and uses an easy-tear, easy-strip liner for hand application. The tape provides high dielectric strength with arc and track resistance and is a Class H material for continuous operation at 180 deg C. Applied in half-lapped layers with moderate tension, it forms a fused protective wrap for high-voltage cable and other high-temperature electrical insulation work.

Key features

• Instant self-fusion: The silicone rubber fuses to itself without a pressure-sensitive adhesive and does not need to be held down after wrapping.
• Class H temperature capability: The 180 deg C continuous Class H rating applies to high-temperature primary insulation applications.
• Arc and track resistance: High dielectric strength with arc and track resistance suits protective overwraps on high-voltage terminations.

Applications

Applications include high-voltage cable termination overwraps, Class H primary insulation, spacer-cable splice overwraps, and outdoor electrical protection.