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	Original Value	Comments

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

Mechanical Properties	Original Value	Comments
Penetration	10 @Load 0.100 kg	[mm]

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

Thermal Properties	Original Value	Comments
Brittleness Temperature	-65.0 °C	ASTM D2137

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

Processing Properties	Original Value	Comments
Cure Time	1.00 min @Treatment Temp. 120 °C
	3.00 min @Treatment Temp. 150 °C
	35.0 min @Treatment Temp. 100 °C

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

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PWACK9416 / 204945

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