3M 7000005818 3M™ Glass Cloth Electrical Tape 69, 3/4 in x 66 ft, White, 50 Rolls/Case

Tape 69 is rated to 200 C (392 F) under UL and 180 C (356 F) under CSA, which is why it gets used on motor and transformer coil work where vinyl tape would soften and let go. The silicone adhesive is what carries that rating, paired with a glass cloth backing.

Glass cloth Tape 69 is a holding and high-heat tape, not a primary splice insulation. Its dielectric strength is 3000 V, well below what a rubber or vinyl splicing tape gives you, and glass cloth doesn't stretch to conform (elongation at break is only 5 percent). Use it for coil and core banding, holding leads, sleeve and harness wrap, and anywhere the assembly runs hot. For insulating a conductor splice, use a stretchable vinyl or rubber electrical tape instead.

UL Recognized, including as a flame retardant, plus CSA, and RoHS 2011/65/EU. That combination is what lets it be specified into listed electrical equipment builds rather than just used as a shop tape.

Its electrolytic corrosion factor is 0.9, essentially neutral, so it can sit directly on copper or aluminum windings and bus without driving galvanic attack. Insulation resistance is 4.8 x 10^4 megohms, and the tape is RoHS 2011/65/EU compliant.

Nominal total thickness is 0.178 mm (7.0 mil), with the glass cloth carrier alone at 0.125 mm. That is thicker than a standard vinyl electrical tape, so account for the buildup if you're banding into a tight stator slot or pulling a taped bundle through a conduit or sleeve.

Yes, the white glass cloth surface is printable, so it takes marker legibly and is commonly used as a phase or circuit identification wrap as well as a holding tape. White is the only color on this configuration.

Five years from date of manufacture when stored per 3M's recommended conditions. For an MRO crib buying by the 50-roll case, that means a case can be stocked without worrying it'll turn over before the adhesive does.

Tape 69 is graded Professional by 3M and country of origin is the United States, which matters on jobs carrying domestic-sourcing requirements. Its stated market is electrical equipment manufacturing.