3M™ Scotchcast™ 260 Epoxy Powder Resin

Harmonization Code : 3907.30.20 | Epoxide resins of a kind used for coating in powder form

Main features

Fast curing
Excellent electrical properties
Excellent flow • UL 1446 Electrical Insulation System (EIS) approval at class 120(E), 130(B), 155(F), and 180(H)

Product Description

3M™ Scotchcast™ Electrical Resin 260 is a one-part, heat-curing epoxy powder resin designed to deliver a tough, continuous dielectric coating for electrical insulation and protection. This green, pigmented resin melts, flows, and cures upon contact with preheated substrates, forming a smooth, uniform, and durable coating. Engineered through a fusion blend process, each particle contains all necessary components for complete curing and consistent performance. It is widely used for moisture-proofing and insulating electrical components in demanding environments.

Product Key Features

Rapid heat-curing formulation improves processing efficiency
Provides reliable dielectric insulation performance
High resistance to thermal shock, impact, and cut-through
Withstands heat, chemicals, and moisture exposure
Ensures uniform coating on flat surfaces, edges, and corners
Meets UL 1446 Electrical Insulation System (EIS) standards across multiple temperature classes (120E, 130B, 155F, 180H)

Applications

Insulating and moisture-proofing armatures and stators
Coating bus bars and toroidal cores
Electrical component protection in industrial equipment
Applications requiring durable dielectric coatings
Protective coating for components exposed to harsh environmental conditions

Specifications

Technical Specifications

General Properties

Color

Color
The color

Green

Specific Gravity

Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume.

For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.

1.43

Electrical Properties

Dielectric Strength

Dielectric Strength
Dielectric strength is measured in kV per mm and is calculated by the Breakdown voltage divided by the thickness of the tested material.

Those two properties go hand in hand and while Breakdown voltage is always thickness dependent, dielectric strength is a general material property.

As an example, the dielectric strength of Polyimide is 236 kV/mm. If we place 1mm of Polyimide between two electrodes, it will act as an insulator until the voltage between the electrodes reaches 236 kV. At this point it will start acting as a good conductor, causing sparks, potential punctures and current flow.

39.37 kV/mm

Thermal Properties