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DOWSIL™ 3140 RTV Coating – Adhesive/Coating – Protection of electronic components and circuit boards

  • Item Name: DOWSIL™ 3140 RTV Coating
  • Manufacturer: Dow Chemical Company
  • Technologies: Polydimethylsiloxane adhesive
  • Color: Clear to slightly hazy smooth viscous liquid
  • Cure Type: Room temperature moisture cure
  • Package Size: Contact to Techniq VN for details.
  • Shelf Life: Contact to Techniq VN for details.

1. Product Overview

DOWSIL™ 3140 RTV Coating is a one-part, translucent silicone adhesive designed for coating and encapsulation applications. It offers good flowability, flame resistance, and self-leveling properties. The product is UL 94 V-1, IPC-CC-830, and MIL-I-46058C tested, making it suitable for electronic and industrial applications.

2. Applications

  • Protection of corrosion-sensitive components
  • Coating for rigid and flexible circuit boards
  • Improved pin/solder joint coverage
  • Thin-section encapsulation
  • Pin sealing

3. Typical Properties

Property Unit Result
Type One-part, RTV Silicone
Color Clear to slightly hazy
Viscosity cP (Pa-sec) 34,400 (34.4)
Specific Gravity (Cured) 1.05
Non-Volatile Content (NVC) % 95.7
Tack-Free Time (25°C) Minutes 116
Tensile Strength psi 434
Elongation % 419
Hardness Shore A 31.6
Tensile Modulus psi 103
Adhesion (180° Peel Strength) ppi 40
Dielectric Strength Volts/mil (kV/mm) 385 (15)
Volume Resistivity Ohm*cm 2.1 × 10¹⁴
Dielectric Constant (100 Hz, 100 kHz) 2.52
Dissipation Factor (100 Hz, 100 kHz) 0.004
Flammability Rating UL 94 V-1 @ 1.4 mm, UL 94-HB @ 1.9 mm

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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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