3M

3M 74 Polyester Film Electrical Tape

3M™ 74 is an ultra-thin yellow electrical insulation tape with a polyester backing and thermosetting rubber adhesive. Ideal for space-constrained insulation applications, it provides high dielectric strength and excellent resistance to chemicals, moisture, abrasion, and cut-through. The tape is designed for continuous operation not exceeding 130°C (266°F) per UL listing.

Thin, general purpose polyester film tape
Offers good electrical strength for coil applications where space is at a premium
Designed for continuous operation not exceeding 130°C (266°F) per UL listing

Color: Yellow

Backing/Carrier Material: Polyester Film

Adhesive Type: Thermosetting Rubber

TotalThickness: 0.8 mil

Overview
Customize
Features
Specifications
Compliance
Resources

Overview

Consult

Specify a finalized design or create a new one from scratch with our experienced converting experts.

Design

Pair our material sampling library with our precision converting capabilities to optimize and validate a prototype.

Produce

Rely on our top-tier suppliers, strict quality controls, and hands-on help to ensure your product's effectiveness throughout its lifecycle.

Customize

Customize This Material

Our wide range of converting capabilities allow us to take this material and transform it into the right width, length, shape or fabricated part to not only achieve ideal integration into your end use, but also optimize how you apply the material in your application. Our converting equipment paired with our expert engineering team will help you create the exact custom solution for your unique requirements.

To learn more about the most common converting services we offer, or to contact our team to start discussing your solution, please utilize the below links:

Tape Slitting

Die-Cutting

Custom Part Fabrication

Prototyping

Custom Length Rolls

Features

Thin, general purpose polyester film tape
Offers good electrical strength for coil applications where space is at a premium
Designed for continuous operation not exceeding 130°C (266°F) per UL listing
Excellent resistance to chemicals, solvents, moisture, abrasion and cut through
Thermosetting rubber adhesive provides excellent adherence
Adhesive requires no heat, moisture or other manner of preparation to affect application

Specifications

Color	Yellow
Backing/Carrier Material	Polyester Film
Adhesive Type	Thermosetting Rubber
Total Thickness	0.8 mil
Backing/Carrier Thickness	0.5 mil
Adhesive Thickness	0.3 mil
Adhesive Strength	16 oz/in
Tensile Strength	10 lb/in
Elongation	75%
Dielectric Breakdown	3,800 volts
Insulation Resistance	1 x 10¹² ohms
Maximum Temperature Performance	266°F

Compliance

We value the importance of up to date an accurate regulatory information on the products we work with. For the most current Compliance and Regulatory information on your product of interest, please contact our experts for assistance.

Resources

Technical Data Sheet

3M™ Polyester Film Electrical Tape 74 is a yellow electrical insulation tape featuring an ultra-thin 0.5 mil polyester film backing coated with a non-corrosive, thermosetting rubber adhesive. Designed for motor, coil, and transformer insulation applications where space is limited, it delivers high dielectric strength along with excellent resistance to chemicals, solvents, moisture, abrasion, and cut-through. The thermosetting rubber adhesive provides strong, reliable adhesion without the need for heat, moisture, or additional surface preparation. UL listed for continuous operation at temperatures up to 130°C (266°F), this durable polyester film tape offers dependable performance in electrical insulation applications.

Commonly used in wrapping coils, capacitors, wire harnesses, transformers, shaded pole motors and fractional-horsepower motors where space is at a premium

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