ITW Insulcast® RTVS 27 FC Silicone Potting/Encapsulation Compound

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ITW Insulcast® RTVS 27 FC 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 27 FC is a low viscosity UL 94V-0 Flame Retardant, general purpose, reversion resistant RTV Silicone. With the ability to cure rapidly at room temperature, RTVS 27 FC combines the virtues of low temperature flexibility, excellent electrical properties, high temperature resistance and easy removal for component replacement or repair. Information provided by ITW Performance Polymers.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.50 g/cc	1.50 g/cc	Uncured. Part A
	1.50 g/cc	1.50 g/cc	Uncured. Part B
Viscosity	2800 cP	2800 cP	Part B; ASTM D1084
	2900 cP	2900 cP	Mixed, Part A, Part B; ASTM D1084
	3000 cP	3000 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	135 %	135 %	ASTM D412
Tear Strength	3.16 kN/m	18.0 pli	Die B; ASTM D624

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+15 ohm-cm	1.00e+15 ohm-cm	ASTM D257
Dielectric Constant	3.0 @Frequency 1000 Hz	3.0 @Frequency 1000 Hz	ASTM D150
Dielectric Strength	21.7 kV/mm	550 kV/in	ASTM D149
Dissipation Factor	0.0040	0.0040	ASTM D150

Thermal Properties	Metric	English	Comments
CTE, linear	220 µm/m-°C	122 µin/in-°F
Thermal Conductivity	0.310 W/m-K	2.15 BTU-in/hr-ft²-°F	ASTM D5470
Maximum Service Temperature, Air	204 °C	399 °F
Minimum Service Temperature, Air	-55.0 °C	-67.0 °F
Glass Transition Temp, Tg	-52.0 °C	-61.6 °F	cured

Processing Properties	Metric	English	Comments
Cure Time	60.0 min @Temperature 25.0 °C	1.00 hour @Temperature 77.0 °F
Tack-Free Time	30.0 min	0.500 hour	Uncured. Part A, Part B
Pot Life	<= 5.00 min	<= 5.00 min	Part A, Part B
Gel Time	3.00 - 5.00 min	3.00 - 5.00 min	uncured. Part A, Part B
Shelf Life	12.0 Month	12.0 Month	Part A, Part B

Descriptive Properties
Color	Buff (Neutral)		part B, uncured
	Dark Gray		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.

PITWIN9117 / 239627

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