3M Scotch Glass Cloth Tape 69 – High-Temp Electrical Insulation, 1/2 in x 22 yd

Overview

3M Scotch Glass Cloth Tape 69 is a premium-grade electrical tape designed for demanding high-temperature insulation needs. Featuring a tough glass cloth backing and a precision silicone adhesive, this tape offers reliable bonding, solvent resistance, and stability across challenging operating conditions. It is built for dry-location use and stands up to heat without sacrificing flexibility or form.

The tape is flame retardant and rated for structures like motors and transformers, where insulation integrity matters. It provides a strong, consistent bond from cool start-up to elevated temperatures, all without the need for heat or moisture prior to application. This makes it a practical choice for field repairs, installations, and service projects where time and accuracy are key.

Key benefits

• STRONG BOND AT HIGH TEMPERATURES: Bonds reliably from low temperatures to 392°F (200°C).
• GLASS CLOTH BACKING: Resists rotting and shrinking, helping insulation stay stable over time.
• VERSATILE INSULATION OPTIONS: Use as coil cover, anchor, banding, core layer, or crossover insulation.
• NON-CORROSIVE, SOLVENT-RESISTANT ADHESIVE: Thermosetting silicone adhesive delivers a clean, long-lasting bond.
• EASE OF APPLICATION: No heat, prep, or moisture required before applying, speeding up installations and repairs.

Real‑world scenarios

In electrical enclosures and control panels, this tape can insulate windings, protect splices, and secure insulation layers around cables in dry environments. Its glass cloth backing provides durable handling without excessive stiffness, while the silicone adhesive stays bonded through temperature cycling. The flame-retardant construction adds an extra layer of safety in equipment such as motors and transformers, where insulation boundaries matter.

For technicians and engineers, the tape supports practical coil covers, anchors, and cross-insulation tasks in complex assemblies. The combination of high-temperature tolerance, strong adhesion, and solvent resistance helps maintain insulation integrity over time in demanding industrial settings.

Specifications and standards

• Size: 1/2 in x 22 yd (12.7 mm x 22.86 m) per roll
• UL component recognized (UL510A, File No. E17385)
• CSA certified (C22.2 No. 66)
• QPL-19166 (MIL-I-19166C), Type IV
• Flame retardant, 600V rating, suitable for dry location use

Note: For industrial and occupational use only. Not for consumer sale or use. Regulatory details are provided to help you confirm compatibility with your project requirements.