Scotch® Silicone Rubber Electrical Tape 70 HDT is a high-temperature arc-and track- resistant tape composed of self-fusing, inorganic silicone rubber and easy-tear and easy-strip liner. The 70 HDT product also has a triangular (tapered edge) profile and blue guidelines to make half-lapping application easier.
The 70 HDT tape is a high‑temperature, arc‑ and track‑resistant self‑fusing silicone rubber tape with a triangular (tapered) edge and blue guide lines for easy half‑lap application. It is designed for use as an overwrap on high‑voltage cable terminations, primary insulation for Class H temperatures, and splice protection on spacer cables rated 5 kV and above.
The data sheet provides detailed physical and electrical properties, test results, installation techniques, shelf‑life guidance, and warranty information, helping users select and apply the tape correctly in demanding outdoor or contaminated environments.
| Peak Thickness | 0.020 in |
|---|---|
| Edge Thickness | 0.008 in |
| Tensile Strength | 1000 psi |
| Elongation at Break | 300 % |
| Dielectric Strength | 600 V/mil |
| Arc Resistance (minimum) | 1 min |
| Volume Resistivity | 7 × 10¹⁴ Ω·cm |
| Continuous Operating Temperature (Class H) | 80 °C (356 °F) |
| Shelf Life | 5 years |
The tape is rated for Class H temperatures, allowing continuous operation up to approximately 80 °C (356 °F).
When stored under recommended conditions, the tape retains its properties for five years from the date of manufacture.