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Thermally Conductive, Deep Section Cure Reversion Resistant, RTV Silicone Encapsulant.
Epoxosil RTV-1295 is a low viscosity, RTVS silicone encapsulant which displays high thermal conductivity, and may be heat accelerated to final cure. Epoxosil RTV-1295 will conform to UL 94 V-0 flame retardency, and is also reversion resistant.
Properties - Uncured:- Part A: Part B:
Color, visual Red Clear
Viscosity ASTM-D-1084 80,000 cps 1,000 cps
Specific Gravity 2.4 .96
Mix Ratio (weight) 100:10
Mixed Viscosity ASTM-D-1084 20,000 cps
Pot Life @ 72ºC 40 - 45 Minutes
Shelf Life @ 72ºC 6 Months
Properties - Cured:-
Hardness, ASTM-D-2240 (Durometer) Shore A 75
Tensile Strength, ASTM-D-412 475 psi
Tensile Elongation, ASTM-D-412 100%
Tear Strength, ASTM-D-624 (Die B lb./in.) 20
Coefficient of Thermal Expansion (cm/cm/ºC) 18 x 10^-5 psi
Service Temperature -55ºC to 204ºC
Dielectric Strength, ASTM-D-149 (volts/mil) 500
Dielectric Constant, ASTM-D-150 (60 Hz) 3.7
Dissipation Factor, ASTM-D-150(60 Hz) 0.005
Volume Resistivity, ASTM-D-257 (ohm-cm) 5x10^14
Thermal Conductivity 10.0 BTU
Overnight at room temperature (12 – 16 hours @ 72 F), or
a) 4 hours @ 140 F
b) 1 hour @ 200 F
c) 15 minutes @ 250 F
Certain materials may inhibit the cure of Epoxosil RTV-1295 when placed in contact with the mixed, uncured rubber. Materials such as amines and amine cured epoxies, sulfur containing materials and condensation (tin cured) silicones, are some which may cause inhibition. Even surfaces which have been in contact with such materials may cause it. If in doubt, a patch test should be done.
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