ITW Insulcast® MRTV 2 Silicone Potting/Encapsulation Compound

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ITW Insulcast® MRTV 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 MRTV 2 is a high tear strength, high elongation, addition cure mold-making RTV silicone rubber. MRTV 2 has very low shrinkage on cure. The MRTV 2 is ideal for detailed reproduction. Information provided by ITW Performance Polymers.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.00 g/cc	1.00 g/cc	Uncured. Part B
	1.15 g/cc	1.15 g/cc	Uncured. Part A
Viscosity	10000 cP	10000 cP	Part B; ASTM D1084
	11000 cP	11000 cP	Part A; ASTM D1084
	90000 cP	90000 cP	Part A, Part B, mixed, uncured; ASTM D1084

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	40	40	ASTM D2240
Tensile Strength	4.83 MPa	700 psi	ASTM D412
Elongation at Break	400 %	400 %	ASTM D412
Compressive Strength	0.621 MPa	90.0 psi
Tear Strength	15.8 kN/m	90.0 pli	Die B; ASTM D624

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.60e+15 ohm-cm	1.60e+15 ohm-cm	ASTM D257
Dielectric Constant	2.94 @Frequency 1000 Hz	2.94 @Frequency 1000 Hz	ASTM D150
Dielectric Strength	19.7 kV/mm	500 kV/in	ASTM D149
Dissipation Factor	0.00020 @Frequency 1000 Hz	0.00020 @Frequency 1000 Hz	ASTM D150

Thermal Properties	Metric	English	Comments
CTE, linear	420 µm/m-°C	233 µin/in-°F
Thermal Conductivity	0.311 W/m-K	2.16 BTU-in/hr-ft²-°F
	0.311 W/m-K	2.16 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air	204 °C	399 °F
Minimum Service Temperature, Air	-55.0 °C	-67.0 °F

Processing Properties	Metric	English	Comments
Cure Time	60.0 - 120 min @Temperature 65.0 °C	1.00 - 2.00 hour @Temperature 149 °F	option
	180 - 240 min @Temperature 50.0 °C	3.00 - 4.00 hour @Temperature 122 °F	option
	1440 min @Temperature 25.0 °C	24.0 hour @Temperature 77.0 °F	option
Pot Life	2.00 min @Temperature 25.0 °C	2.00 min @Temperature 77.0 °F	Part A. 100 g
	2.00 min @Temperature 25.0 °C	2.00 min @Temperature 77.0 °F	Part B. 100g
Shelf Life	6.00 Month	6.00 Month	Part A
	6.00 Month	6.00 Month	Part B

Descriptive Properties
Color	clear		part B, uncured
	white		part A, uncured
Mix Ratio by weight	100:10		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.

PITWIN9112 / 239622

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