ITW Insulcast® RTVS 27 LV Silicone Potting/Encapsulation Compound

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ITW Insulcast® RTVS 27 LV Silicone Potting/Encapsulation Compound
Categories:	Polymer; Thermoset; Silicone; Silicone, RTV, Encapsulation Grade
Material Notes:	RTVS 27 LV is a low viscosity, general purpose, reversion resistant RTV Silicone Compound and finds use in commercial potting/casting applications. RTVS 27 LV one-to-one ratio by weight or volume makes it ideal for dispensing equipment or unskilled labor. With the ability to cure rapidly at elevated temperatures, RTVS 27 LV can be processed quickly in production situations, and meets the requirements of UL 94V-0. Information provided by ITW Performance Polymers.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.47 g/cc	1.47 g/cc	Uncured. Part A
	1.47 g/cc	1.47 g/cc	Uncured. Part B
Viscosity	1200 cP	1200 cP	Mixed, Part A, Part B; ASTM D1084
	1200 cP	1200 cP	Part A; ASTM D1084
	1200 cP	1200 cP	Part B; 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	100 %	100 %	ASTM D412
Tear Strength	3.16 kN/m	18.0 pli	Die B; ASTM D624

Electrical Properties	Metric	English	Comments
Volume Resistivity	3.00e+14 ohm-cm	3.00e+14 ohm-cm	ASTM D257
Dielectric Constant	3.4 @Frequency 1000 Hz	3.4 @Frequency 1000 Hz	ASTM D150
Dielectric Strength	19.7 kV/mm	500 kV/in	ASTM D149
Dissipation Factor	0.0040 @Frequency 1000 Hz	0.0040 @Frequency 1000 Hz	ASTM D150

Thermal Properties	Metric	English	Comments
CTE, linear	220 µm/m-°C	122 µin/in-°F
Thermal Conductivity	0.0259 W/m-K	0.180 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air	204 °C	399 °F
Minimum Service Temperature, Air	-55.0 °C	-67.0 °F
Flammability, UL94	V-0	V-0
Shrinkage	0.20 %	0.20 %

Processing Properties	Metric	English	Comments
Pot Life	120 min	120 min	Part A, Part B
Shelf Life	12.0 Month	12.0 Month	Part A, Part B

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

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PITWIN9119 / 239629

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