3M 7100004537 Electrical Tape 30 Mil 1.5 in X 20 Ft Black

Product Description

The 3M 7100004537 is a Series 77 rubber-adhesive electrical insulating tape rated at 30 mil thickness. It measures 1.5 inches wide and 20 feet long, making it suitable for heavy-duty insulation wrap applications where standard 7 mil vinyl tape does not provide adequate dielectric build. The rubber adhesive bonds well to wire, cable, and connector surfaces across a range of temperatures and humidity conditions. Licensed electricians and HVAC technicians reach for tape at this thickness when wrapping splices, terminations, and irregular profiles that need a conformable, heavy build in fewer passes.

This tape is used in residential and light commercial electrical work for insulating wire splices, bundling conductors, and covering terminal connections where additional mechanical protection is required. At 30 mil, it is well suited for applications where multiple layers of standard tape would otherwise be used. The black color aids in UV identification and is the standard for general electrical insulation service.

Key Features

• 30 mil thickness delivers heavy insulation build in fewer wraps compared to standard vinyl electrical tape
• Rubber adhesive provides strong, conformable bond to wires, cables, and connectors
• 1.5-inch width covers wider splice areas and irregular profiles efficiently
• 20-foot roll length suitable for field service and bench work
• Black color standard for general electrical insulation identification
• Series 77 product line designed for insulating applications

Compatibility

Designed as a general-purpose electrical insulating tape for use in residential and commercial wiring insulation, splice wrapping, and conductor bundling applications where heavy-build tape is specified.

Installation Notes

Licensed electricians should apply this tape in accordance with NEC guidelines for insulation of splices and terminations. De-energize and lock out the circuit before taping any splice or connection. Stretch the tape slightly during wrap to ensure full adhesion and a void-free build. Avoid contact with oils or solvents on the substrate surface prior to application, as contamination can reduce adhesive bond strength.