ITW Insulcast® RTVS 27 NA Silicone Potting/Encapsulation Compound

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ITW Insulcast® RTVS 27 NA 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 NA is a low viscosity, general purpose, reversion resistant RTV Silicone Compound. RTVS 27 NA finds use in commercial potting/casting applications. RTVS 27 NA’s one-to-one ratio by weight or volume makes it ideal for dispensing equipment or hand mixing. With the ability to cure rapidly at elevated temperatures, RTVS 27 NA can be processed quickly in production situations. Information provided by ITW Performance Polymers.
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Physical Properties	Original Value	Comments

Specific Gravity	1.47 g/cc	Uncured. Part A
	1.47 g/cc	Uncured. Part B
Viscosity	2500 cP	Part A; ASTM D1084
	2700 cP	Mixed, Part A, Part B; ASTM D1084
	3000 cP	Part B; ASTM D1084

Mechanical Properties	Original Value	Comments
Hardness, Shore A	60	ASTM D2240
Tensile Strength	500 psi	ASTM D412
Elongation at Break	135 %	ASTM D412
Tear Strength	18.0 pli	Die B; ASTM D624

Electrical Properties	Original Value	Comments
Volume Resistivity	1.00e+15 ohm-cm	ASTM D257
Dielectric Constant	3.15 @Frequency 1000 Hz	ASTM D150
Dielectric Strength	450 V/mil	ASTM D149
Dissipation Factor	0.0080 @Frequency 1000 Hz	ASTM D150

Thermal Properties	Original Value	Comments
CTE, linear	220 µm/m-°C
Thermal Conductivity	2.50 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air	204 °C
Minimum Service Temperature, Air	-55.0 °C
Shrinkage	0.20 %

Processing Properties	Original Value	Comments
Cure Time	0.250 hour @Temperature 95.0 °C	option
	12.0 - 16.0 hour @Temperature 25.0 °C	option
Pot Life	60.0 - 90.0 min	Part A, Part B
Shelf Life	6.00 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

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PITWIN9120 / 239630

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