Description
Shin-Etsu’s KE-3421 is a fast, single component, room-temperature curing conformal coating that will cure to form a durable and flexible elastomer for protecting electronic components. KE-3421 is suitable for application by selective spray coating, mass coating, and flow coating, making it ideal for coating circuit boards. KE-3421 meets IPC-CC-830, Amendment B
Product Features
- UV tracer for easy inspection
- Fast cure
- Single component
- Room-temperature cure
- Low odor and non-corrosive
- Excellent unprimed adhesion to most substrates
- UL V-1
- IPC-CC-830 Amendment B
Typical Applications
- Coating circuit boards and other electronic components
Typical Properties
| Type | Conformal Coating |
| Cure Type | Condensation |
| One/Two Component | One |
| UL Listing | Y |
| Color | Light Yellow Translucent |
| Density @ 23C (g/cm³) | 1 |
| Viscosity (cps) | 250 |
| Cure Conditions | 7days @ 23C/50% RH |
| Tack Free Time (min) | 5 |
| Shore A Hardness | 25 |
| Tensile Strength (MPa) | 0.7 |
| % Elongation | 80 |
| Shear Strength (MPa) | 0.2 |
| Volume Resistivity (TΩ-m) | 1 |
| Dielectric Strength (kV/mm) | 25 |
| Dielectric Constant | 3.1 @ 50Hz |
| Dielectric Dissipation Factor | 1×10⁻⁴ @ 50Hz |
| Thermal Conductivity (W/m·K) | 0.2 |
| Usable Temperature Range (C) | -40 to +180 |
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