3M

3M 1339 Polyester Film/Glass Filament Reinforced Electrical Tape

3M™ Reinforced Electrical Tape 1339 is an industrial grade 6.5 mil electrical tape constructed with a polyester film, glass filament reinforced backing mated to a pressure sensitive acrylic adhesive. This product is used for lead anchoring, coil banding and other high tensile strength electrical applications. Specifically designed for effectiveness when used in electrical applications, this product exhibits excellent conformability for uneven or irregular application surfaces, high dielectric strength and high tensile strength.

Conformable, solvent-resistant, high temperature filament tape with acrylic adhesive
Designed for applications needing both the dielectric strength of polyester film and the high mechanical strength of glass fibers
Low stretch, high tensile and edge-tear resistance

Color: White

Backing/Carrier Material: Polyester Film/Glass Filament

Adhesive Type: Acrylic

TotalThickness: 6.45 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

Conformable, solvent-resistant, high temperature filament tape with acrylic adhesive
Designed for applications needing both the dielectric strength of polyester film and the high mechanical strength of glass fibers
Low stretch, high tensile and edge-tear resistance
Designed for continuous operation not exceeding 130°C (266°F)
A more cost-effective solution to glass cloth tapes

Specifications

Color	White
Backing/Carrier Material	Polyester Film/Glass Filament
Adhesive Type	Acrylic
Total Thickness	6.45 mil
Adhesive Strength	30 oz/in
Tensile Strength	250 lb/in
Dielectric Breakdown	4,990 volts
Insulation Resistance	1 x 10¹⁰ 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™ Filament Tape 1339 is a durable, conformable tape featuring a strong acrylic adhesive and reinforced with glass fibers for exceptional mechanical strength.

Designed for applications that require the superior dielectric strength of polyester film combined with high tensile strength.

This insulating tape delivers reliable performance in high-temperature and solvent-exposed environments.

Anchoring lead wires, banding of coils and end-turn taping

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