• Item Name: DOWSIL™ CC-4555 Long Bath Life Conformal Coating
• Manufacturer: Dow
• Technologies: One-part, translucent, low-viscosity silicone conformal coating; solventless; long bath life; heat-cure; stress-relieving with UV indicator for inspection
• Color: Translucent (Clear)
• Cure Type: Heat cure (fast at low temperature, tack-free ~4 min @120 °C); long bath life at room temperature
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.
DOWSIL™ CC-4555 Long Bath Life Conformal Coating is a one-part, translucent, solventless, heat-curing silicone coating formulated for PCB protection. It has low viscosity, fast low-temperature cure, and exceptionally long bath life, reducing purging and clean-up needs. Once cured, it forms a soft, low-stress elastomer that resists humidity, vibration, and thermal shock, while maintaining dielectric integrity. It features a UV indicator for automated inspection and holds UL V-0 flammability certification.
Protective coating for rigid and flexible circuit boards
Printed Wiring Boards (PWB) and sensitive electronic components
Fine-pitch designs requiring low-stress insulation
Environments with thermal cycling, humidity, and vibration
Suitable for dip, spray, brush, flow, or automated pattern coating methods
| Property | Unit | Still Not Mixed (One-part) | After Cured |
|---|---|---|---|
| Color | – | – | Translucent (Clear) |
| Viscosity | cP | 225 | – |
| Specific Gravity | – | 0.97 | 0.98 |
| Tack-Free Time at 120°C | min | – | 4 |
| Refractive Index | – | – | 1.41 |
| Durometer | Shore A / Shore 00 | – | 22 / 78 |
| Tensile Strength | psi / MPa | – | 60 / 0.4 |
| Elongation | % | – | 25 |
| Tensile Modulus | psi / MPa | – | 250 / 1.7 |
| Dielectric Strength | volts/mil / kV/mm | – | 540 / 21.6 |
| Volume Resistivity | ohm·cm | – | 4.04E+13 |
| Dielectric Constant | – | – | 2.70 (100 Hz) – 2.71 (24 MHz) |
| Dissipation Factor | – | – | <0.0002 (100 Hz) – 0.0037 (24 MHz) |
| Non-Volatile Content | % | – | 99.6 |
| UL Flammability | – | – | V-0 |
| Useful Temperature Range | °C | – | -45 to 200 |
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