Epoxy insulating varnish | for transformers | for electric motors | Class B | 230V | 70kV | 130 °C | 3kg

Technical Specifications:

Thermal class: Class B (130 °C)

Rated voltage: 230 V

Breakdown voltage: ≥ 70 kV

Viscosity (23 ± 1 °C, No. 4 viscometer): 20–50 s

Solids content (105 ± 2 °C, 2 h): 50 % ± 2 %

Drying time (0.1 mm film, 105 ± 2 °C): ≤ 0.5 h

Impregnation temperature: 50–60 °C

Impregnation time: 15 min (without bubble release)

Capacity: 3 kg

Shelf life: 12 months (in original sealed packaging)

Functions:

Ensures high electrical insulation up to 130 °C

Penetrates well into wound wires, cracks, and micro‑voids

Creates a uniform protective coating resistant to moisture, oils, and aging

Reduces vibration and noise in coil systems

Dries quickly—accelerates manufacturing and repair processes

Resistant to thermal deformation and electrochemical effects

Applications:

Impregnation of electric motor windings

Insulation of transformers, coils, and chokes

Treatment of electromagnets

Repair work in electromechanical assemblies

Protection of equipment from dust, moisture, and temperature fluctuations

Advantages:

Good adhesion to copper and aluminum wire

Easily coats components of complex shapes

Suitable for both professional repair and small workshops

Stable, economical (long-lasting and well-distributed)

Disadvantages:

Not suitable for loads above Class B (130 °C)

Class B insulating impregnation varnish is a reliable choice for anyone working with medium-voltage electrical equipment. Thanks to its excellent electrical and mechanical properties, ease of use, and rapid drying, it is especially suitable for both industrial and repair sectors. The varnish helps extend equipment service life, improve insulation properties, and reduce the risk of electrical faults.