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Ensinger PEI
Momentive Performance Materials RTV142 White, Low Volatile, One Component Silicone Sealant
Categories: Polymer; Adhesive; Thermoset; Silicone; Silicone, RTV, Adhesive/Sealant Grade

Material Notes: RTV 142 one-component, ready-to-use adhesive sealant cures to a tough, durable, resilient silicone rubber on exposure to atmospheric moisture at room temperature. Methyl alcohol vapors are released from the sealant surface as a by-product of cure. These vapors have low odor and are non-corrosive to metals. An important property of RTV142 is its low volatility.

RTV 142 sealant has a thixotropic paste-like consistency. This allows it to be applied to vertical and overhead surfaces without sagging. Since it utilizes a moisture cure system, RTV142 sealant should not be used in thicknesses of greater than 6mm(1/4 in.). When section depths exceed 6mm(1/4in.), GE Silicones one-component, addition cure or two-component silicone rubber compounds are suggested.

Mechanical properties for specimen cured 10 days at 25°C and 50% relative humidity.

Key Performance Properties:

  • One component product
  • Room temperature cure
  • Primerless adhesion to many substrates
  • Low odor
  • Non-corrosive to metals
  • Low volatility
  • Low temperature flexibility
  • High temperature performance
  • Excellent weatherability and ozone and chemical resistance
  • Excellent electrical insulation properties
  • Non-halogen flame retardant

Applications:

The non-corrosiveness to metals and low volatility of RTV142, as well as its paste consistency, make it well suited for critical electronic adhesive, gasketing, and sealing applications where a high level of volatile condensable materials cannot be tolerated.

GE Silicones became a part of Momentive Performance Materials in 2006.

Vendors:
Available Properties
  • Specific Gravity
  • Linear Mold Shrinkage
  • Collected Volatile Condensable Material, Ball aerospace VCM test 33074
  • Hardness, Shore A
  • Tensile Strength, Ultimate
  • Elongation at Break
  • Adhesive Bond Strength, At 100% cohesive failure
  • Tear Strength
  • Peel Strength, At 100% cohesive failure using 1 in. x 8 in. stainless steel screen at 180° pull angle
  • Volume Resistivity
  • Dielectric Constant
  • Dielectric Strength
  • Dissipation Factor
  • CTE, linear
  • Thermal Conductivity
  • Maximum Service Temperature, Air, Continuous
  • Minimum Service Temperature, Air, Continuous
  • Tack-Free Time
  
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Manufacturer Notes:
Momentive Performance Materials (GE Silicones)

Category Notes
Plastic

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