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	Original Value	Comments

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

Mechanical Properties	Original Value	Comments
Hardness, Shore A	65	ASTM D2240
Tensile Strength	400 psi	ASTM D412
Elongation at Break	17 %	ASTM D412
Tear Strength	8.00 pli	Die B; ASTM D624

Electrical Properties	Original Value	Comments
Volume Resistivity	1.00e+13 ohm-cm @Temperature 125 °C	ASTM D257
	1.00e+14 ohm-cm @Temperature 25.0 °C	ASTM D257
Dielectric Constant	5.0 @Frequency 1000 Hz	ASTM D150
Dielectric Strength	425 V/mil	ASTM D149
Dissipation Factor	0.0050 @Frequency 1000 Hz	ASTM D150

Thermal Properties	Original Value	Comments
CTE, linear	150 µm/m-°C
Thermal Conductivity	0.00500 cal cm/sec-cm²-°C	cured
	1.44 W/m-K	ASTM D5470
Maximum Service Temperature, Air	260 °C
Minimum Service Temperature, Air	-55.0 °C

Processing Properties	Original Value	Comments
Cure Time	0.250 hour @Temperature 125 °C	option
	1.00 hour @Temperature 90.0 °C	option
	2.00 - 4.00 hour @Temperature 65.0 °C	option
	24.0 hour @Temperature 25.0 °C	option
Gel Time	120 - 240 min	uncured. Part A, Part B
Shelf Life	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

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