Applications

Momentive RTV12 Clear Potting Compound

  • Product code: RTV12 Clear
  • Manufacturer: Momentive
  • Package size: contact us for details
  • Shelf Life: contact us for details

The Momentive SILTRUST™ RTV12 is a clear, two-component, low-viscosity potting compound that cures at room temperature into a soft, pliable rubber. It is designed to provide primerless adhesion to many substrates, including metals, plastics, and ceramics, which are commonly found in electronic assemblies.

Key Features and Benefits:

  • Transparency: Allows for easy identification and inspection of components.
  • Primerless Adhesion: Bonds well to many materials without additional primers.
  • Repairable: Components can be accessed and replaced if needed.
  • Room-Temperature Curing: No need for external heat sources.
  • Excellent Electrical Properties: Suitable for both high- and low-voltage electrical assemblies.
  • Vibration & Shock Resistance: Provides cushioning to protect electronic components.
  • Non-Corrosive: Specially formulated to minimize copper corrosion.
  • Ease of Use: Can be mixed manually or using automated equipment.

Uncured Properties (As Supplied)

Property RTV12A Base Compound RTV12C Curing Agent
Color Clear, Slight Haze Clear
Viscosity (cps) 1300 15
Specific Gravity 1.00 0.84
Solvent None Mineral Spirits

Catalyzed Properties (RTV12A + RTV12C)

Property Value
Base to Curing Agent Ratio (by weight) 20:1
Catalyzed Viscosity at 5 min (cps) 1500
Catalyzed Brookfield Viscosity at 30 min (cps) 3200
Catalyzed Brookfield Viscosity at 60 min Gel
Gel Time at 25°C (77°F) 100 min
Durometer, Shore A (at 3 days) 18
Specific Gravity 1.00

Cured Properties (ASTM Sheet, 1.9mm thickness)

Property Value
Dielectric Strength (volts/mil) 400
Dielectric Constant (1 kHz) 3.0
Dissipation Factor (1 kHz) 0.001
Volume Resistivity (Ω·cm) 1.0 × 10¹³
Useful Temperature Range -60°C to 204°C (-75°F to 400°F)

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