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Home > Focus on! > Thermal Interface Materials > RTV Rubber: Addition-cure Liquid Silicone Rubber

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Oil Compounds High-hardness Thermal Interface Silicone Rubber Thermal Interface Silicone Soft Pads / Ultra Soft Pads Thermal Interface Phase Change Materials Double Sided Thermal Interface Silicone Tapes Condensation-cure RTV Rubber Addition-cure Liquid Silicone Rubber

RTV Rubber

Addition-cure Liquid Silicone Rubber
Shin-Etsu silicone rubber products, compounded with special filler to enhance the properties of thermal conductivity, are heat curable addition type and can thus be uniformly cured in a short period of time regardless of the thickness of the rubber. They exhibit excellent thermal conductivity and are best suited as potting materials to protect the wire and components from vibration and heat deformation.

Main Features
  • Excellent thermal conductivity a Excellent electrical properties.
  • Superior heat and cold resistance a Deep section curing is possible.
  • Excellent resistance to chemicals and medicine a Superior flame retardant properties.
Primary Applications
  • As sealant for heatsinks and pipes
  • As sealing materials for thermal conductive circuits
  • As protection and thermally conductive potting materials for electrical and electronic components
  • As molding materials for thermally conductive parts and components
 Application of RTV rubber
Application of RTV rubber
General Properties

Type

One-component adhesive type,
Addition cure

Two-component adhesive type,
Addition cure
Item Grade
KE-1867 KE-1891 KE-1285A/B KE-1861A/B
Appearance Gray Gray A: Gray / B: Light gray A / B: Light gray
Viscosity Pa·s
80 Paste A: 25 / B: 5
Mixed 9		 A / B: 50
Mixed 50
Density at 23℃ g/cm3
2.92 3.06 1.74 2.22
Hardness Durometer A 75 96 53 75
Tensile Strength MPa
2.1 4.8 2.5 6.4
Elongation at break %
40 10 140 80
Volume Resistivity TΩ·m
1.2 3.4 6.5 10.0
Thermal Conductivity* W/m·K
2.2 4.0 0.8 0.8
Dielectric Constant 50Hz 6.7 - 4.0 4.0
Dielectric Dissipation Factor 50Hz 0.0045 - 0.01 0.0016
Dielectric Breakdown Strength kV (1.0mm)
23 25 26 25
Standard Curing Condition 120℃/1h 120℃/1h 120℃/1h 120℃/1h
Lap Shear Strength MPa
1.0 (Aluminum) 0.8 (Aluminum) 1.3 (Aluminum) 1.0 (Aluminum)
Flammability UL94 V-0 V-0 V-0 V-0
Blend Ratio - - 100 / 100 100 / 100
Low Molecular Siloxane Content
ΣD3-D10		 ppm
< 300 < 300 < 500 -
* Measured with hot-wire method.
(Not specified values)
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