Scotch Self-Fusing Silicone Rubber Electrical Tape 70 Data Sheet October 2018 Product Description Scotch Self-Fusing Silicone Rubber Electrical Tape 70 is a high-temperature arc and track-resistant tape composed of self-fusing, inorganic silicone rubber with easy-tear and easy-strip liner. Agency Approvals & For RoHS information, please visit www.3M.com/regs Self Certifications Product Features Excellent track resistance. Excellent arc resistance. Excellent ozone resistance. High dielectric strength Class H material (180C continuous operation). Workable at extremely low temperatures. Excellent instantaneous fusion does not need to be held down. Matches Sky Blue Gray Munsell 5BG7.0/0.4. Excellent weathering characteristics. AA-59163 Class-I Type-I. Applications As an overwrap for protection of terminating high-voltage cables against arcing and tracking. High-voltage cables with these insulations should be overwrapped: o Butyl rubber o Oil-base rubber o Ethylene propylene rubber o P.V.C. o Low and high-density polyethylene cross-linked As primary insulation where Class H (180C/356F) temperatures are encountered i.e., silicone rubber cables. As splice overwrap on spacer cable operating at 15kV and above. Data Scotch Rubber Electrical Tape 70 has a thickness of 12 mils and is available in roll size 1 inch wide x 30 ft. long. The core is 1 inch I.D. 1 of 6 Scotch Self-Fusing Silicone Rubber Electrical Tape 70 Installation Scotch Self-Fusing Silicone Rubber Electrical Tape 70 should be applied in half-lap Techniques layers using moderate tension. Scotch Rubber Electrical Tape 70 should be applied on all tape-like terminations which will be operated either outdoors or in areas subjected to contamination or moisture. The following procedure should be used: If possible, connect the termination to its final position. Otherwise, take care not to damage the final overwrap of silicone tape during installation. Overwrap the end seal with several half-lapped layers. Overwrap the entire termination with one additional half- lapped layer. For upright termination, begin from one inch on cable jacket and end at the lug. For inverted termination, end taping on the cable jacket. Wrap with moderate tension (10 to 100 percent elongation). Apply last lap with zero stretch. Press down to avoid end lifting before fusion takes place. Scotch Rubber Electrical Tape 70 can also be applied over the exposed cable insulation and/or end seal used in conjunction with molded (slip-on) stress cones. Techniques for the proper use of Scotch Rubber Electrical Tape 70 are contained in standard and special prints available through the 3M Systems for Splicing and Terminating Program. This material may be obtained through your local 3M Electrical Markets Division representative. NOTE REGARDING LINER REMOVAL: To separate the liner from the tape when starting a new roll, simply stretch the liner and tape until the silicone tape breaks. The liner will then separate at this point. Characteristics and Physical Properties Typical Value Test Data Munsell 5BG7.0/0.4 Color Sky Blue Gray Thickness 0.012 in ASTM-D-1000-10 Tensile Strength 12 lbs./in. ASTM-D-1000-10 Elongation at Break 450% ASTM-D-1000-10 Electrical Properties Dielectric Strength 875 V/mil ASTM-D-1000-10 Arc Resistance 1 min. (minimum) ASTM-D-495-71 Note: These are typical values and should not be used for specification purposes. 2 of 6