Industrial Coating

DVB-2148L(T) Non-solvent-based insulation varnish

For impregnation of small rotors and stoppers

DVB-2148L(T) is a type F (155 ℃) varnish for impregnation that mainly consists of unsaturated polyester resin. It features outstanding adhesiveness and forms an even film after curing. This product is suitable for impregnation of small rotors and stoppers.


Paint type
Two-component unsaturated polyester resin
Product Features
1. It features outstanding heat resistance. (Type F: 155 ℃) 2. It is a low viscosity type product featuring outstanding impregnation performance. 3. It features outstanding electrical properties. 4. It features superb elasticity. 5. It does not erode the vinyl lead line.
Storage stability (40℃) (A + B)
Over 7 days
Transparent light brown
0.2 - 0.5 POISE
Curing conditions
2 - 4 hours at 120 - 130 ℃
Specific gravity
1.04 ± 0.02
Type F (155 ℃)-E93947
Gel time (120 ℃)
3 - 5 min.
Storage conditions
Store in a shaded indoor space with sufficient ventilation.
Mixing ratio
A : B = 100 : 1 (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 5.0 × 1015 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 40 - 50 ℃.
4. Impregnate it in well-mixed varnish for 2 - 5 minutes. (Impregnation in the vacuumed state can increase the penetrance.)
5. Leave until the varnish does not fall off from the substrate (10 - 30 minutes at room temperature).
6. Dry according to the designated curing conditions.
1. Liquid B (hardener) is sensitive to heat. So store it in a refrigerated space.
2. 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 ℃.
3. Instructions above may vary depending on the type of substrate and the painting line conditions
4. Please refer to the MSDS when handling the product.