Products

Momentive RTV122 Silicone Sealant

  • Product code: RTV122
  • Manufacturer: Momentive
  • Package size: contact us for details
  • Shelf Life: contact us for details

RTV122 is a one-component, ready-to-use adhesive sealant that cures at room temperature upon exposure to atmospheric moisture. Once cured, it forms a tough, resilient silicone rubber with excellent adhesion properties.

Key Features & Benefits

  • Primerless adhesion to many metals and plastics (except polycarbonate)
  • Non-corrosive to aluminum and steel (per MIL-A-46146A)
  • Lower odor than conventional acetoxy silicone sealants
  • UL Recognized (UL File No. E-36952)
  • Excellent electrical insulation properties
  • Temperature resistance:
    • Long-term: -60°C (-75°F) to 204°C (400°F)
    • Short-term: Up to 260°C (500°F)
  • Superior weatherability, ozone, and chemical resistance

Applications

  • Sealing vertical joints
  • Bonding dissimilar materials (e.g., metal to plastic, glass to aluminum)
  • Electrical insulation for wires and terminals
  • Formed-in-place gaskets

Uncured Properties

Property RTV122 (White) / RTV123 (Black) / RTV128 (Translucent)
Consistency Thixotropic Paste
Specific Gravity 1.04
Application Rate (gm/min, 3.2 mm orifice @ 621 kPa) 500
Tack-Free Time (minutes) 20
Cure-Through Time (hours) 24

Cured Properties (After 3 Days at 25°C, 50% RH)

Property Unit RTV122 / RTV123 / RTV128
Hardness Shore A 30
Tensile Strength MPa (psi) 1.72 (250)
Elongation % 350
Tear Strength kN/m (lb/in) 6.1 (35)
Peel Strength (Aluminum) kN/m (lb/in) 7.0 (40)

Electrical Properties

Property Unit RTV122 / RTV123 / RTV128
Dielectric Strength kV/mm (V/mil) 20 (500)
Dielectric Constant @ 60 Hz 2.8
Dissipation Factor @ 60 Hz 0.016
Volume Resistivity Ω·cm 4 × 10¹⁵

Thermal Properties

Property Unit RTV122 / RTV123 / RTV128
Brittle Point °C (°F) -60 (-75)
Thermal Conductivity W/m·K 0.21
Coefficient of Expansion cm/cm·°C (in/in·°F) 27 × 10⁻⁵ (15 × 10⁻⁵)

Everwide FX244-1: High Performance for Precision Molding

FX244-1 A specialized two-part silicone rubber designed for creating high-precision molds. This material features a unique oil-bleeding property that creates a self-releasing surface, eliminating the need for external non-stick sprays during demolding.

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