3M 7000057773 Mastic Electrical Tape 3.25x4.5 in Black

Product Description

The 3M 7000057773 is a mastic-adhesive electrical tape designed for insulating and sealing applications in electrical systems. Part of the 3M Series 2200 line, it measures 3.25 inches wide by 4.5 inches long and carries a thickness of 125 mil, making it well suited for void-filling and conforming to irregular surfaces. With a dielectric strength of 300 volts per mil and a tensile strength of 20 pounds per inch, it provides reliable electrical isolation where standard vinyl tapes fall short. Licensed electricians and electrical contractors are the primary installers of this product.

This tape is used where a conformable, self-sealing material is needed to insulate splices, cable joints, and terminations. The mastic construction allows the tape to flow into air gaps and surface irregularities, creating a moisture-resistant seal. It performs within an operating temperature range of 0 degrees F to 100 degrees F, making it appropriate for indoor residential and light commercial electrical work. Its black coloring is standard for electrical insulation applications.

Key Features

• Mastic adhesive construction conforms to irregular surfaces and fills voids for a complete seal
• 125 mil thickness provides substantial insulation and mechanical protection
• Dielectric strength of 300 volts per mil supports reliable electrical isolation
• Tensile strength of 20 pounds per inch resists tearing during application
• Operating range of 0 degrees F to 100 degrees F suits most indoor electrical environments
• Dual-purpose use for both insulating and sealing in a single application

Compatibility

Designed as an OEM-style replacement and standard-use mastic tape for residential and light commercial electrical insulation and sealing applications where a conformable, high-thickness tape material is specified.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC guidelines. De-energize and lock out the circuit before applying tape to any splice or termination. Mastic tape should be stretched slightly during wrap to activate conformability and ensure full surface contact. Avoid applying this tape in environments that exceed the rated temperature range, as adhesion and dielectric performance may be compromised.