Industrial Coating

DVB-5400 Non-solvent-based insulation varnish

Automobile alternators and armatures

DVB-5400 is an insulating varnish for motors developed for impregnation and dripping of electric tools and armatures. This varnish mainly consists of an epoxy resin that can be cured with acid anhydride and has long pot life and outstanding adhesion performance.


Paint type
Triple-component epoxy resin
Product Features
1. It features outstanding heat resistance. (Type F: 155 ℃) 2. It features outstanding electrical properties. 3. It features outstanding adhesiveness. 4. It features outstanding compatibility with coil.
Storage stability (40℃) (A + B + C)
Over 2 days
A/B/C: No color / Light yellow / No color
A/B/C: 12 - 22 / 0.2 - 0.4 / Below 0.1 POISE
Curing conditions
At least 1 hour at 130 - 150 ℃
Specific gravity
A/B/C = 1.14/1.21/0.96
Not certified
Gel time (120 ℃)
2 - 5 min.
Storage conditions
Store in a shaded indoor space with sufficient ventilation.
Mixing ratio
A : B : C = 90 : 30 : 0.3 (Weight)
Shelf life
6 months from the manufacturing date (when storage conditions are met)


Breakdown voltage
Above 9 KV (Twist Pair method, MW-5 Coil)
Volume resistivity
At least 1.0 × 1014 Ω㎝

how to use

How to use
1. Mix evenly after adding the substances according to the designated mixing ratio.
2. Preheat the substrate at 80 - 120 ℃ for 10 - 30 minutes to eliminate cutting oil and debris from the substrate.
3. Maintain the surface temperature of the substrate at above 100 ℃.
4. Rotate the substrate and drip the evenly mixed varnish using a nozzle.
5. Rotate the substrate until the varnish does not drop any longer, and dry it according to the designated curing conditions.
1. Liquid B (Hardener) is sensitive to moisture. So store it in a dry and cool indoor space.
2. Liquid C (Hardener catalyst) is sensitive to heat. So store it in a refrigerated space.
3. When the varnish temperature is high, there is a risk of varnish turning into gel. So maintain the varnish temperature inside the tank at below 30 ℃.
4. Instructions above may vary depending on the type of substrate and the painting line conditions.