Chemical Concepts ChemSet™ 355 Silicone Potting Material, Black

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Chemical Concepts ChemSet™ 355 Silicone Potting Material, Black
Categories:	Polymer; Thermoset; Silicone; Silicone, RTV, Encapsulation Grade
Material Notes:	ChemSet 355 is a 100% silicone solids elastomer designed for electronic potting applications. The two-component system offers a flame retardant, thermally conductive, low modulus material that is readily repairable. Key Features: 100% solids – no solvents. Long pot life, Low modulus, Good elongation, UL 94 V-0 rated, file number: QMFZ2.E205830. Information provided by Chemical Concepts™.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.63 g/cc	1.63 g/cc	335A, uncatalyzed
	1.63 g/cc	1.63 g/cc	335B, uncatalyzed
Viscosity	6000 cP	6000 cP	335A, uncatalyzed
	6000 cP	6000 cP	335B, uncatalyzed

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	45	45	Cured, 15 minutes @ 150°C
Tensile Strength	1.72 MPa	250 psi	Cured, 15 minutes @ 150°C
100% Modulus	1.24 MPa @Strain 100 %, Temperature 150 °C	180 psi @Strain 100 %, Temperature 302 °F	cured, 15 minutes
Tear Strength Test	45 @Temperature 150 °C	45 @Temperature 302 °F	cured, 15 minutes

Electrical Properties	Metric	English	Comments
Volume Resistivity	4.02e+14 ohm-cm	4.02e+14 ohm-cm
Dielectric Constant	3.08 @Frequency 1000 Hz	3.08 @Frequency 1000 Hz
Dissipation Factor	0.0090	0.0090
Comparative Tracking Index	600 V	600 V

Thermal Properties	Metric	English	Comments
Thermal Conductivity	0.680 W/m-K	4.72 BTU-in/hr-ft²-°F	hot wire method
Maximum Service Temperature, Air	240 °C	464 °F
Minimum Service Temperature, Air	-55.0 °C	-67.0 °F
Flammability, UL94	V-0 @Thickness 3.00 mm	V-0 @Thickness 0.118 in

Processing Properties	Metric	English	Comments
Working Life	100 min @Temperature 25.0 °C	100 min @Temperature 77.0 °F

Descriptive Properties
Color	335A, beige, uncatalyzed
	335B, black, uncatalyzed
Mix Ratio	1:1
Performance Level Category (PLC)	0

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.

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