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Low Viscosity, Flame Class 94 V-O, RTV Silicone Compund.
Epoxosil RTV-1142 is a low viscosity, room temperature vulcanizing liquid silicone rubber compound, which is Flame Class 94 V-O. It is used for electronic component and system embedment and sealing. It exhibits good toughness, low temperature flexibility, and high temperature resistance, as well as the superior electrical properties exhibited by RTV silicones.
Properties - Uncured:-
Color, visual White
Viscosity ASTM-D-1084 18,000 cps
Specific Gravity 1.4
Mix Ratio (RTV cat 12) 0.1-0.5 by weight
Mixed Viscosity ASTM-D-1084 16,000 cps
Pot Life @ 72ºC 1-4 Hours
Shelf Life @ 72ºC 6 Months
Properties - Cured:-
Hardness, ASTM-D-2240 (Durometer) Shore A 55
Tensile Strength, ASTM-D-412 600 psi
Tensile Elongation, ASTM-D-412 150%
Tear Strength, ASTM-D-624 (Die B lb./in.) 35
Coefficient of Thermal Expansion (cm/cm/ºC) 20 x 10^-5 psi
Service Temperature -55ºC to 204ºC
Shrinkage 0.2% to 0.5%
Dielectric Strength, ASTM-D-149 (volts/mil) 500
Dielectric Constant, ASTM-D-150 (60 Hz) 3.8
Dissipation Factor, ASTM-D-150(60 Hz) 0.12
Volume Resistivity, ASTM-D-257 (ohm-cm) 1x10^15
Thermal Conductivity 2.5 BTU
Overnight at room temperature (12-16 hours) @ 72ºF. Faster tack-free surfaces achieved using varied catalysts.
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