Scotch® 69 Glass Cloth Tape, White, Silicone Adhesive


3M 69

This is a 7 mil woven glass cloth tape with a silicone pressure-sensitive adhesive. UL Recognized 180°C. Printable. Sold on a 1 inch core with an inner pack of 1 per box and 10 per carton. Scotch® Glass Cloth Tape 69 is edge-tear resistant conformable, high-temperature flame resistant adhesive; for use as a coil cover, anchor, for banding and core, layer and crossover insulation. Printable. Recommended for use with Scotch® 77 Electric Arc-Proofing Tape.

Scotch® 69 Glass Cloth Tape is a 7 mil woven glass cloth tape with a silicone pressure-sensitive adhesive sold on a 1 inch core, and is ideal for electrical maintenance applications. UL Recognized 200°C. In the early 1940s, vinyl plastic emerged as a highly versatile material for a wide range of applications, from shower curtains to cable insulation. Making it work for tape, however, was a different story. A major ingredient in vinyl film was tricresyl phosphate (TCP), which was used as a plasticizer. Unfortunately, TCP tended to migrate, giving the surface of the vinyl film an oily quality and degrading every tape adhesive known. Research chemists and engineers at 3M™ set out to create a dependable, pressure-sensitive tape made of vinyl film that would have the required electrical, physical and chemical properties. Experiments were conducted combining new plasticizers with the white, flour-like vinyl resin. Finally, in January 1946, inventors Snell, Oace, and Eastwood of 3M™ applied for a patent for a vinyl electrical tape with a plasticizer system and non-sulfur-based rubber adhesive that were compatible. The first commercially available version of the tape was sold for use as a wire-harness wrapping. Interestingly, this original black tape wasn't black at all. Tapes formulated for high-temperature were yellow, and later versions were white. White tape, because of its instability in ultraviolet light, was eventually replaced with black tape, although colored vinyl tapes are still used as identification and marking tapes. Black became the standard industry color for vinyl standard tape, primarily because of its ultraviolet resistance. Thicknesses originally were 4-mil, 8-mil and 12-mil caliper. These were standardized to 7-mil and 10-mil in 1948.


  • It is conformable, printable and flame retardant.

Typical Applications: 

  • Insulating electric and induction-type furnace power supply leads
  • Securing high-temperature, non-PSA insulation (such as asbestos and glass) in high-temperature areas
  • Securing Scotch® Fire Retardant Electric Arc Proofing Tape 77
  • Splicing wire SF and SFF rated 302° F (150° C), 356° F (180° C)
  • Reinsulating and repairing coils on mining machines
  • Splicing silicone-covered glass wire where splices require more abrasion resistance and mechanical strength than can be provided by silicone tapes Insulating Class “H” dry-type transformer leads
  • Insulating splices made on SA type wire in heat treat areas
  • Especially suited to high-temperature applications||Used in a variety of coil/transformer and motor applications, including an outer wrap for bobbin wound coils, banding arbor wound coils, lead pad hold down, end turn and lead anchor and connection.

Data Sheets & Summary Sheets


WARNING: California Proposition 65 - Cancer and Reproductive Harm -