ITW Insulcast® RTVS 8128 Silicone Potting/Encapsulation Compound

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ITW Insulcast® RTVS 8128 Silicone Potting/Encapsulation Compound
Categories:	Polymer; Thermoset; Silicone; Silicone, RTV, Encapsulation Grade
Material Notes:	Insulcast® solutions are compounds designed for potting and encapsulating. RTVS 8128 is a low viscosity Flame Retardant, general purpose, reversion resistant RTV Silicone. With the ability to cure rapidly at elevated temperature, RTVS 8128 combines the virtues of low temperature flexibility, excellent electrical properties, high temperature resistance and easy removal for component replacement or repair. Meets the requirements of UL 94V-0. Information provided by ITW Performance Polymers.
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Physical Properties	Original Value	Comments

Specific Gravity	1.31 g/cc	Uncured. Part B
	1.38 g/cc	Uncured. Part A
Viscosity	2000 cP	Mixed, Part A, Part B; ASTM D1084
	2000 cP	Part A; ASTM D1084
	2000 cP	Part B; ASTM D1084

Mechanical Properties	Original Value	Comments
Hardness, Shore A	>= 45	ASTM D2240
	<= 55
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	1.50e+15 ohm-cm	ASTM D257
Dielectric Constant	3.0 @Frequency 1000 Hz	ASTM D150
Dielectric Strength	550 V/mil	ASTM D149
Dissipation Factor	0.0070 @Frequency 1000 Hz	ASTM D150
Comparative Tracking Index	>= 600 V
Hot Wire Ignition, HWI	30 - 60 sec
High Amp Arc Ignition, HAI	60 - 120 arcs

Thermal Properties	Original Value	Comments
CTE, linear	220 µm/m-°C
Thermal Conductivity	0.180 W/m-K
Maximum Service Temperature, Air	204 °C
Minimum Service Temperature, Air	-55.0 °C
Flammability, UL94	V-0

Processing Properties	Original Value	Comments
Cure Time	0.250 hour @Temperature 120 °C	option
	1.00 hour @Temperature 90.0 °C	option
	4.00 hour @Temperature 60.0 °C	option
	24.0 hour @Temperature 25.0 °C	option
Pot Life	60.0 - 90.0 min	Part A, Part B
Gel Time	240 - 360 min	uncured. Part A, Part B
Shelf Life	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

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PITWIN9126 / 239636

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