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DOWSIL™ CC-4555 Long Bath Life Conformal Coating – Heat-cure, solventless coating with long bath life and stress relief

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.

1. Product Overview

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.


2. Applications

  • 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

3. Typical Properties

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

BERGQUIST microTIM mTIM 1028 Thermal Interface Coating High performance thermal management solution for nickel finished heat sinks, optical transceivers, and data center liquid cooling systems

BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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