
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Item Name: Dow Corning® 4 Electrical Insulating Compound
Manufacturer: Dow Corning
Technologies: Grease-like silicone compound with inert silica filler and polydimethyl silicone fluids
Color: White; translucent
Cure Type: Grease-like, does not cure; applied as insulating/lubricating compound
Package Size: Tubes, pails, and drums
Shelf Life: 60 months
Dow Corning® 4 Electrical Insulating Compound is a grease-like, silicone-based insulating material formulated with an inert silica filler and polydimethylsiloxane fluids. It provides excellent dielectric strength, low volatility, strong moisture resistance, and chemical stability across a broad temperature range. The compound adheres well to metals, ceramics, rubbers, plastics, and resins, while maintaining its consistency from –55 °C to +200 °C. It meets SAE AS 8660 requirements and offers long-term stability with up to 60 months shelf life.
Moisture-proof sealing in aircraft, automotive, and marine ignition systems.
Spark plug connections, electrical junctions, terminals, and assemblies.
Seal and lubricant for cable connectors, battery terminals, O-rings, switches, rubber seals.
Assembly lubricant for metal–plastic and metal–rubber combinations.
General protective compound for harsh, high-humidity environments.
Property | Unit | Result |
---|---|---|
Still Not Mixed (As Supplied) | ||
Color | – | White; translucent |
NLGI Grade | – | No. 2 |
Penetration (unworked) | mm/10 | 220 |
Penetration (worked, 60x) | mm/10 | ≤310 |
Relative Density @ 25 °C | g/ml | 1.0 |
After Cured / In Service | ||
Bleed (30 h / 200 °C) | % | ≤6.0 |
Evaporation (30 h / 200 °C) | % | ≤2.0 |
Service Temperature Range | °C | –55 to +200 (up to 260 without oxygen) |
Melting Point | °C | None |
Dielectric Strength (1.27 mm gap) | kV/mil | 1.0 |
Permittivity @ 100 Hz | – | 3.1 |
Permittivity @ 100 kHz | – | 3.1 |
Dissipation Factor @ 100 Hz | – | 0.0025 |
Dissipation Factor @ 100 kHz | – | 0.0025 |
Volume Resistivity @ 23 °C | ohm·cm | 1.0 × 10¹⁴ |
Arc Resistance | s | 120 |
Shelf Life | months | 60 (unopened container) |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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