Applications

DOWSIL™ CC-3122 Conformal Coating – Conformal Coating – PCB Protection

Item Name: DOWSIL™ CC-3122 Conformal Coating
Manufacturer: The Dow Chemical Company
Technologies: Silicone (RTV conformal coating based on polydimethylsiloxane)
Color: Translucent
Cure Type: Room temperature cure with optional heat acceleration
Package Size: Available in nominal 0.45, 3.6, 18.1, and 200 kg containers
Shelf Life: Contact to Avantek for details.

1. Product Overview

DOWSIL™ CC-3122 is a one-part, translucent, low-viscosity, room-temperature-vulcanizing (RTV) silicone conformal coating designed for electronic protection. It provides excellent flow into narrow gaps and spaces, cures at room temperature with optional heat acceleration, and includes a UV indicator for inspection. The formulation is solvent-free and offers long-term protection for electronic assemblies.

2. Applications

  • Rigid circuit boards
  • Electronic Printed Wiring Boards (PWB)
  • Sensitive components and fine-pitch designs

3. Typical Properties

Property Test Method Unit Result
Appearance CTM 0176 Translucent
Viscosity CTM 0050 mPa∙s 80
Specific Gravity (Cured) CTM 0022 1.03
Skin-over time (25°C, 50% RH) CTM 0098 Minutes 6
Hardness (Shore A) CTM 0099 75
Dielectric Strength CTM 0114 kV/mm 32
Volume Resistivity CTM 0249 Ohm*cm 2.3 × 10¹⁶
Flammability Classification UL 94 V-0

4. Processing & Curing

  • Curing Mechanism: Moisture cure (RTV)
  • Cure Acceleration: Heat up to 60°C (140°F)
  • Application Methods: Dip coating, brush flow, automated spray coating

5. Performance & Handling

  • Temperature Range: -40°C to 200°C (-40°F to 257°F)
  • Adhesion: Improves over 72 hours; surface preparation recommended
  • Storage & Shelf Life: Protect from moisture; store in sealed containers

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