Wacker Semicosil® 925 Silicone Gel

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Wacker Semicosil® 925 Silicone Gel
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber
Material Notes:	SEMICOSIL® 925 is a high purity, one-component addition curing RTV-2 silicone gel. Special features: Low ion content Low volatile content Low viscosity Good mechanical damping properties Application: SEMICOSIL® 925 is a dielectric gel especially designed to seal, protect and preserve the electrical characteristics of delicate electronic components (e.g. bonded chips on hybrid components which are exposed to extreme external influences). Information provided by Wacker Chemie AG.
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Physical Properties	Metric	English	Comments

Density	0.970 g/cc	0.0350 lb/in³
Solids Content	100 %	100 %
Brookfield Viscosity	700 cP	700 cP

Mechanical Properties	Metric	English	Comments
Penetration	10 @Load 0.100 kg	10 @Load 0.221 lb	[mm]

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+14 ohm-cm	1.00e+14 ohm-cm	IEC 60093
Dielectric Constant	2.5 @Frequency 1000 Hz	2.5 @Frequency 1000 Hz	IEC 60250
Dielectric Strength	21.7 kV/mm	551 kV/in	IEC 60243
Dissipation Factor	0.00010 @Frequency 1000 Hz	0.00010 @Frequency 1000 Hz	IEC 60250

Thermal Properties	Metric	English	Comments
Brittleness Temperature	-65.0 °C	-85.0 °F	ASTM D2137

Optical Properties	Metric	English	Comments
Transmission, Visible	90 %	90 %	"Transparent" but manufacturer does not quantify.

Processing Properties	Metric	English	Comments
Cure Time	1.00 min @Treatment Temp. 120 °C	0.0167 hour @Treatment Temp. 248 °F
	3.00 min @Treatment Temp. 150 °C	0.0500 hour @Treatment Temp. 302 °F
	35.0 min @Treatment Temp. 100 °C	0.583 hour @Treatment Temp. 212 °F

Descriptive Properties
Appearance	Transparent liquid
Content	<1 ppm		Extractable Ion Content K
	<3 ppm		Extractable Ion Content Na
	<5 ppm		Extractable Ion Content Cl

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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PWACK9416 / 204945

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