DOWSIL 3-4680
Harmonization Code : 3506.91.90.99 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other
Main features
- Fast Room-Temperature Encapsulation Cure
- Low-Viscosity Dispensing Control
- Electrically Insulating Encapsulation
Product Description
DOWSIL™ 3-4680 Silicone Gel Kit is a two-part, addition-cure silicone dielectric gel supplied in a 1:1 mix ratio. The transparent blue, low-viscosity material cures rapidly at room temperature to form a soft gel for sealing, encapsulating, and potting electronic devices. Its short working time and room-temperature cure support applications requiring rapid processing, while heat can be used to further accelerate cure. After processing, the gel combines high volume resistivity and dielectric strength with the soft, resilient characteristics associated with silicone gel protection.
Key features
- Fast room-temperature cure: Reaches 90% of final properties in approximately 15 minutes at room temperature.
- Low-viscosity processing: Typical viscosity of 275 mPa·s supports dispensing and filling before gelation.
- Dielectric performance: Typical dielectric strength of 400 V/mil (16 kV/mm) and volume resistivity of 3.60 × 1015 ohm-cm after cure.
Applications / Suitable for
- Sealing electronic devices
- Electronic encapsulation and potting
- Protection of delicate electronic components
- Applications requiring cushioning against mechanical shock and vibration
TDS, SDS & Technical Documents
Technical Specifications
Physical Properties
General Properties
Electrical Properties
Additional Information
As-supplied / before-processing properties
Typical properties for the two-part silicone gel before and during initial processing.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Cure system | Addition cure | — | Two-part system; 1:1 mix ratio |
| Color | Transparent blue | — | Typical |
| Viscosity | 275 | mPa·s | Typical; equivalent to centipoise |
| Specific gravity | 0.97 | — | Cured or uncured Parts A and B |
| Working time | <10 | min | Time for initial mixed viscosity to double at room temperature |
| Shelf life | 12 | months | From date of manufacture in the original unopened container, stored below 35°C |
After-processing / final-state properties
Typical properties measured after the mixed silicone has cured to form a soft dielectric gel.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Penetration | 60 | 1/10 mm | Typical cured-gel value |
| Gel hardness | 90 | g | Typical cured-gel value |
| Dielectric strength | 400 / 16 | V/mil / kV/mm | Typical cured-gel value |
| Dielectric constant | 2.75 / 2.75 | — | At 100 Hz / 100 kHz |
| Volume resistivity | 3.60 × 1015 | ohm-cm | Typical cured-gel value |
| Dissipation factor | 0.0004 / <0.00006 | — | At 100 Hz / 100 kHz |
| Linear coefficient of thermal expansion | 435 | µm/(m·°C) | Typical cured-gel value |
