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Thermal Management

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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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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