Applications

DOWSIL™ 3-1944 HP RTV Coating – Translucent conformal coating for PCB protection, pin coverage, and thin encapsulation

Item Name: DOWSIL™ 3-1944 HP RTV Coating
Manufacturer: Dow
Technologies: One-part polydimethylsiloxane RTV conformal coating
Color: Translucent with UV indicator
Cure Type: Room temperature cure with optional heat acceleration
Package Size: 0.45 kg, 3.6 kg, 18 kg, 200 kg containers (other options available)
Shelf Life: 12 months

1. Product Overview

DOWSIL™ 3-1944 HP RTV Coating is a one-part, translucent, solventless silicone elastomer designed for conformal coating and thin encapsulation. It cures at room temperature with optional heat acceleration and features a fast tack-free time, good flame resistance (UL 94 V-0), and added UV indicator for easy automated inspection. The product flows well for precise coverage, curing to a soft, low-stress elastomer that protects delicate circuitry while remaining reworkable.


2. Applications

  • Pin and solder joint coverage to prevent corrosion and arcing.

  • Thin section encapsulation for PCB assemblies.

  • Localized protection of pins, terminals, or critical devices.

  • Moisture and contaminant barrier for sensitive electronics.

  • Repairable conformal coating, allowing component replacement and recoating.

3. Typical Properties

Property Unit Result
Still Not Mixed
One or Two-Part One
Appearance Translucent
Viscosity cP / mPa·s / Pa·s 53,000 / 53,000 / 53
After Cured
Specific Gravity 1.0
Tack-Free Time @ 25°C minutes 7
Durometer Shore A 36
Shelf Life @ 25°C months 12
UL Flammability Classification 94 V-0
Usable Temperature Range °C -45 to 200 (with tolerance to -55 short-term)

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