Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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• Item Name: DOWSIL™ 3-4155 HV Dielectric Gel
• Manufacturer: Dow
• Technologies: Silicone dielectric gel, two-part addition-cure system
• Color: Mixed green (Part A – Blue, Part B – Yellow)
• Cure Type: Room temperature cure (heat accelerates)
• Package Size: 210 mL dual cartridges, 1 gallon pails, 5 gallon pails, 55 gallon drums
• Shelf Life: 12 months
DOWSIL™ 3-4155 HV is a two-part, soft, transparent green dielectric gel with 1:1 mix ratio and high viscosity. It cures quickly at room temperature without ovens and remains flexible in extreme low temperatures down to -80°C, while maintaining stability up to 200°C. Its soft, self-healing nature provides stress relief and insulation, making it well-suited for delicate electronics exposed to harsh environments. Blue and yellow parts mix to green, ensuring blending accuracy.
Encapsulation of PCB assemblies operating under very low temperatures.
Stress relief for components with CTE mismatch during thermal cycling.
Electrical insulation for high-voltage circuits.
Moisture and contaminant protection for sensitive devices.
Optoelectronic applications requiring stable refractive index.
Thick-layer encapsulation of high-architecture designs.
Reworkable systems where repair and patching may be needed.
| Property | Unit | Result |
|---|---|---|
| Still Not Mixed | ||
| Viscosity (Part A) | cP / mPa·s / Pa·s | 1850 / 1850 / 1.9 |
| Viscosity (Part B) | cP / mPa·s / Pa·s | 1875 / 1875 / 1.9 |
| After Mixed / Cured | ||
| Viscosity (Mixed) | cP / mPa·s / Pa·s | 1875 / 1875 / 1.9 |
| Cure Time @ 25°C | hours | 1 |
| Working Time @ 25°C (Snap Time) | minutes | 8 |
| Gel Hardness | grams | 60 |
| Dielectric Strength | volts/mil / kV/mm | 400 / 16 |
| Dielectric Constant @ 100 Hz | – | 2.96 |
| Dielectric Constant @ 100 kHz | – | 2.96 |
| Volume Resistivity | ohm·cm | 2.8 × 10¹⁴ |
| Dissipation Factor @ 100 Hz | – | 0.02 |
| Dissipation Factor @ 100 kHz | – | <0.0001 |
| Shelf Life @ 25°C | months | 12 |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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