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Momentive RTV511 2-components Silicone Capable Sealant

Item No.: RTV511
Manufacturer: Momentive 
Technologies: Two-part silicone elastomer
Color: White
Cure Type: Room temperature cure (RTV) 
Package Size: contact us for details
Shelf Life: contact us for details

RTV511 is a two-part, low-temperature silicone elastomer that cures at room temperature when mixed with a curing agent (typically Dibutyl Tin Dilaurate – DBT). It is designed for applications requiring flexibility, adhesion, and resistance to extreme temperatures.

Key Features and Benefits

  • Adjustable Work Time & Cure Rate: Can be modified by varying the type and amount of curing agent.
  • Room Temperature Cure: No heat required for curing.
  • Solvent-Free Formula: No solvent content or associated odors.
  • Excellent Adhesion: Bonds well to surfaces when used with a primer.
  • Superior Release Properties: Useful in molding and sealing applications.
  • Wide Temperature Resistance:
    • RTV511: Operates continuously from -115°C (-175°F) to 204°C (400°F) and withstands up to 260°C (500°F) for short periods.

Typical Applications

  • Thermal insulation
  • Electrical insulation
  • Sealing and bonding applications in extreme environments
Property RTV511
Color White
Consistency Pourable
Viscosity (cps) 16,000
Specific Gravity 1.21
Work Time @ 25°C (77°F) (hours) 1.5
Cure Time @ 25°C (77°F) (hours) 24
Hardness (Shore A) 42
**Tensile Strength (kg/cm² psi)**
Elongation (%) 170
**Tear Strength (kg/cm lb/in)**
Shrinkage (%) 1.3
**Dielectric Strength (kV/mm V/mil, 1.9 mm thick)**
Dielectric Constant @ 1000 Hz 3.6
Dissipation Factor @ 1000 Hz 0.005
Volume Resistivity (ohm-cm) 2 × 10¹⁴
**Useful Temperature Range (°C °F)**
Thermal Conductivity (W/mK) 0.26
Coefficient of Linear Thermal Expansion (cm/cm, °C) 22 × 10⁻⁵
Specific Heat (cal/g°C) 0.35

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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