Heat-Dissipation
Thermal Conductivity
| Material | Thermal Conductivity (W/m·K) | Notes |
|---|---|---|
| Air (ambient) | ~0.025 | Very low; air gaps between component and heatsink greatly reduce heat transfer |
| Regular Silicone Grease | ~0.2–0.3 | About 8–12× better than air; mostly for gap filling, electrically insulating |
| Thermal Silicone Grease | ~1–8 (depending on filler type) | Metal or ceramic-filled paste; much better heat conduction than air |
water-resistant
Silicone grease is a common material used to make electrical and mechanical connections water-resistant.
1. Properties of Silicone Grease
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Hydrophobic – repels water, does not dissolve in water
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Non-conductive – safe for electrical connections
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Temperature resistant – works from very low to high temperatures
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Lubricating – prevents wear and makes assembly easier
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Chemical resistant – stable, does not react with most plastics or metals
2. How It Works for Waterproofing
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Seals gaps: Fills tiny spaces between threads, O-rings, or connectors, preventing water ingress.
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Protects against corrosion: Prevents moisture from reaching metal surfaces.
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Maintains flexibility: Unlike adhesives or tapes, it stays soft and allows movement without breaking the seal.
3. Common Uses
- Electrical connectors in outdoor devices (LEDs, RC vehicles, marine electronics)
- O-rings on pumps or valves
- Battery terminals exposed to moisture
- Sealing connectors on cameras, sensors, or drones
4. Advantages Over Other Sealants
| Feature | Silicone Grease | Rubber/O-ring Only | Epoxy / Sealant |
|---|---|---|---|
| Waterproof | Excellent | Good if O-ring fits perfectly | Excellent but permanent |
| Reusable | Yes | Yes | No |
| Safe for electronics | Yes | Yes | No (may trap heat) |
| Easy to apply | Very easy | Moderate | Hard / permanent |