ITW Insulcast® RTVS 27 HTC Silicone Potting/Encapsulation Compound

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ITW Insulcast® RTVS 27 HTC Silicone Potting/Encapsulation Compound
Categories:	Polymer; Thermoset; Silicone; Silicone, RTV, Encapsulation Grade
Material Notes:	Insulcast® solutions are compounds designed for potting and encapsulating. RTVS 27 HTC is a low viscosity, UL94V-0 certified, reversion resistant silicone compound. The combination of low viscosity and high thermal conductivity makes the RTVS 27 HTC ideal for potting dense component packages requiring heat dissipation. Information provided by ITW Performance Polymers.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.96 g/cc	1.96 g/cc	Uncured. Part B
	1.98 g/cc	1.98 g/cc	Uncured. Part A
Viscosity	3300 cP	3300 cP	Part B; ASTM D1084
	6000 cP	6000 cP	Mixed, Part A, Part B; ASTM D1084
	8000 cP	8000 cP	Part A; ASTM D1084

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	60	60	ASTM D2240
Tensile Strength	3.45 MPa	500 psi	ASTM D412
Elongation at Break	60 %	60 %	ASTM D412

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+15 ohm-cm	1.00e+15 ohm-cm	ASTM D257
Dielectric Constant	4.0 @Frequency 1000 Hz	4.0 @Frequency 1000 Hz	ASTM D150
Dielectric Strength	19.7 kV/mm	500 kV/in	ASTM D149
Dissipation Factor	0.0075 @Frequency 1000 Hz	0.0075 @Frequency 1000 Hz	ASTM D150

Thermal Properties	Metric	English	Comments
CTE, linear	170 µm/m-°C	94.4 µin/in-°F
Thermal Conductivity	1.00 W/m-K	6.94 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air	232 °C	450 °F
Minimum Service Temperature, Air	-55.0 °C	-67.0 °F
Flammability, UL94	V-0	V-0

Processing Properties	Metric	English	Comments
Cure Time	15.0 min @Temperature 120 °C	0.250 hour @Temperature 248 °F	option
	30.0 min @Temperature 95.0 °C	0.500 hour @Temperature 203 °F	option
	120 min @Temperature 60.0 °C	2.00 hour @Temperature 140 °F	option
	1440 min @Temperature 25.0 °C	24.0 hour @Temperature 77.0 °F	option
Pot Life	1.00 min	1.00 min	Part A, Part B
Shelf Life	6.00 Month	6.00 Month	Part A, Part B

Descriptive Properties
Color	Gray		part A, uncured
	Natural		part B, 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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PITWIN9118 / 239628

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