DOWSIL HC 1000 Silicone Adhesive
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- One-Part, Solventless Silicone Coating
- Room-Temperature Adhesive Cure
- 21 kV/mm Dielectric Strength
Product Description
DOWSIL™ HC 1000 Gray Conformal Coating is a one-part, solventless polydimethylsiloxane conformal coating developed for environmental and dielectric protection of printed circuit board assemblies. The high-viscosity material cures through exposure to atmospheric moisture at room temperature and reaches a typical tack-free state in 11 minutes at 25°C. After cure, it forms a soft, low-stress silicone elastomer that helps protect assemblies exposed to moisture, vibration and harsh operating environments. Its gray pigmentation can hinder component identification, while controlled volatility supports use around sensitive electronic devices. The coating also carries a UL 94 V-0 flammability classification.
Key features
- Solventless, one-part formulation: Supplied as a ready-to-use silicone coating with 97.6% typical non-volatile content.
- Soft, low-stress cured elastomer: Typical Shore A hardness of 24 supports stress-relieving protection of delicate components and interconnections.
- Controlled volatility and flame classification: Designed for use around sensitive devices and classified UL 94 V-0.
Applications / Suitable for
- Printed circuit board system assemblies
- Appliances requiring dielectric insulation
- Electronic assemblies requiring protection from moisture, vibration and harsh operating environments
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Electrical Properties
Thermal Properties
Additional Information
As-supplied / before-processing properties
Typical properties of DOWSIL™ HC 1000 Gray Conformal Coating in its as-supplied condition. Values are not intended for preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Components | One | — | As supplied |
| Color | Gray | — | Typical |
| Viscosity | 12,000 | cP (mPa·s) | Typical |
| Non-volatile content | 97.6 | % | Typical |
| Tack-free time | 11 | minutes | Room-temperature cure at 25°C |
| Room-temperature cure time | 0.5 | hours | Cure time depends on application method, film thickness, temperature and humidity |
After-processing / final-state properties
Typical properties of the cured coating. Values are not intended for preparing specifications or for use alone as design values.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Specific gravity | 1.07 | — | Cured |
| Durometer hardness | 24 | Shore A | Cured |
| Dielectric strength | 525 (21) | V/mil (kV/mm) | JIS K 6249 |
| Volume resistivity | 2.0 × 1015 | ohm·cm | JIS K 6249 |
| Dielectric constant | 3.2 | — | At 1 MHz |
| Dissipation factor | 0.003 | — | JIS K 6249; at 1 MHz |
| Flammability classification | V-0 | — | UL 94 |
