• x

Epiform F-6845ES | Black Motor Insulation Epoxy Coating Powder

Harmonization Code : 3907.30.00.90 |   Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms : Epoxide resins : Other
Main features
  • Class F Epoxy Coating Powder
  • Motor Armature Slot Insulation
  • For Electrostatic Fluidized Bed

Product Description

Epiform F-6845ES is a black, Class F-rated insulating epoxy coating powder, designed for the slot insulation of motor armatures. It works very well for both AC and DC electric motors, as well as for motor stators. The coating provides good heat resistance, high edge coverage, and high impact strength. It is also designed for high throughput of electrostatic fluidized bed equipment and as such as a very fast curing speed during induction cure. Before cure, it boasts a long shelf life at 10°C and once cured offers superior heat resistance and dielectric strength and it is qualified for UL EIS 1446 155°C (Class F) rating.

Epiform F-6845ES is designed specifically for use in Electrostatic Fluidized Bed and automatic electrostatic coating lines such as Braun Sondermaschinen and Nide Equipment. It is available as in black but can be made in other colors if it is needed or required by the motor manufacturer.


Product Family
15kg Box

Catalog Product

Unlike other products we offer, the products listed on this page cannot currently be ordered directly from the website.
Shipping in 8 - 12 weeks Shipping in 8 - 12 weeks

Technical Specifications

General Properties
Bulk Density
Bulk Density
The amount of a certain product that comes in a bulk.
0.80 g/cm3
The color
Process Method Electrostatic Fluidized Bed
Mechanical Properties
Edge Coverage 55 %
Impact Strength 300 mm
Glass Plate Flow
Flow Rate @ 200°C 5 %
Shear strength
Shear Strength 30 N/mm2
Electrical Properties
Cut Through Temperature
Cut Through Temperature
the thermal resistance temperature/ durability
400 °C
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.
36 kV/mm
Volume Resistivity
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
1.0x1014 Ohms⋅cm

Additional Information

Edge coverage


Better edge coverage ensures that there is enough material at the hardest to coat parts of the armature. This is important in order to prevent shorting.


Dielectric Strength

Good dielectric strength ensures that the copper wire is fully insulated from the motor armature stack. A higher dielectric strength allows the material to achieve the same breakdown voltage with less material, translating in a material cost savings.