ITW Insulcast® RTVS 3-95-2 Silicone Potting/Encapsulation Compound

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ITW Insulcast® RTVS 3-95-2 Silicone Potting/Encapsulation Compound
Categories:	Polymer; Thermoset; Silicone; Silicone, RTV, Encapsulation Grade
Material Notes:	Insulcast® solutions are compounds designed for potting and encapsulating. INSULCAST RTVS 3-95-2 is a very highly thermally conductive, high temperature RTV silicone compound which meets the flammability requirements of UL 94V-0. Information provided by ITW Performance Polymers.
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Physical Properties	Metric	English	Comments

Specific Gravity	2.27 g/cc	2.27 g/cc	Uncured. Part B
	2.36 g/cc	2.36 g/cc	Uncured. Part A
Viscosity	35000 cP	35000 cP	Mixed, Part A, Part B; ASTM D2393
	35000 cP	35000 cP	Part A; ASTM D2393
	35000 cP	35000 cP	Part B; ASTM D2393

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	65	65	ASTM D2240
Tensile Strength	2.76 MPa	400 psi	ASTM D412
Elongation at Break	17 %	17 %	ASTM D412
Tear Strength	1.40 kN/m	8.00 pli	Die B; ASTM D624

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+13 ohm-cm @Temperature 125 °C	1.00e+13 ohm-cm @Temperature 257 °F	ASTM D257
	1.00e+14 ohm-cm @Temperature 25.0 °C	1.00e+14 ohm-cm @Temperature 77.0 °F	ASTM D257
Dielectric Constant	5.0 @Frequency 1000 Hz	5.0 @Frequency 1000 Hz	ASTM D150
Dielectric Strength	16.7 kV/mm	425 kV/in	ASTM D149
Dissipation Factor	0.0050 @Frequency 1000 Hz	0.0050 @Frequency 1000 Hz	ASTM D150

Thermal Properties	Metric	English	Comments
CTE, linear	150 µm/m-°C	83.3 µin/in-°F
Thermal Conductivity	1.44 W/m-K	9.99 BTU-in/hr-ft²-°F	ASTM D5470
	2.09 W/m-K	14.5 BTU-in/hr-ft²-°F	cured
Maximum Service Temperature, Air	260 °C	500 °F
Minimum Service Temperature, Air	-55.0 °C	-67.0 °F

Processing Properties	Metric	English	Comments
Cure Time	15.0 min @Temperature 125 °C	0.250 hour @Temperature 257 °F	option
	60.0 min @Temperature 90.0 °C	1.00 hour @Temperature 194 °F	option
	120 - 240 min @Temperature 65.0 °C	2.00 - 4.00 hour @Temperature 149 °F	option
	1440 min @Temperature 25.0 °C	24.0 hour @Temperature 77.0 °F	option
Gel Time	120 - 240 min	120 - 240 min	uncured. Part A, Part B
Shelf Life	12.0 Month	12.0 Month	Part A, Part B

Descriptive Properties
Color	Natural		part B, uncured
	Red		part A, uncured
Mix Ratio by volume	1:1		Part A: Part B
Mix Ratio by weight	1:1		Part A: Part B

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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