• Item Name: DOWSIL™ HC 1000 Gray Conformal Coating
• Manufacturer: Dow Chemical Company
• Technologies: One-part polydimethylsiloxane conformal coating
• Color: Gray
• Cure Type: Room temperature cure, moisture-activated with mild heat acceleration
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.
DOWSIL™ HC 1000 is a one-part, solventless, gray conformal coating formulated from polydimethylsiloxane. It cures at room temperature into a soft, low-stress elastomer with a UL 94 V-0 flammability rating, offering flame resistance and controlled volatility. The material adheres well to many solder types, resists moisture, vibration, and harsh conditions, and provides excellent dielectric insulation. With rapid tack-free curing and optional mild heat acceleration, it enhances reliability in electronic assemblies while remaining reworkable.
PCB system assemblies
Electrical appliances requiring dielectric insulation
Protection against moisture, vibration, and environmental stress
Circuits where pigmented coating is desired to hinder component identification
| Property | Condition | Value |
|---|---|---|
| Part Type | – | One-part |
| Color | – | Gray |
| Viscosity | – | 12,000 cP (12 Pa·s) |
| Specific Gravity (Cured) | – | 1.07 |
| Non-Volatile Content | – | 97.6% |
| Tack-Free Time | 25°C | 11 min |
| Cure Time | Room Temp | 0.5 h |
| Hardness | Shore A | 24 |
| Dielectric Strength | JIS K 6249 | 525 V/mil (21 kV/mm) |
| Volume Resistivity | JIS K 6249 | 2.0 × 10¹⁵ Ω·cm |
| Dielectric Constant | 1 MHz | 3.2 |
| Dissipation Factor | 1 MHz | 0.003 |
| Flammability | UL | 94 V-0 |
| Operating Temp. Range | – | -45 to 200°C |
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