Wacker Powersil® XLR® 620 A/B Liquid Rubber

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Wacker Powersil® XLR® 620 A/B Liquid Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber
Material Notes:	Product description: POWERSIL® XLR® 620 A/B is an especially low viscous, two-component silicone compound with excellent processing properties. The vulcanized rubber is noted for the good mechanical properties as well as for the excellent dielectrical behaviour. Special features: ready-to-use, two-component system extreme low viscosity as a liquid rubber excellent processing with suitable mixing and dosing equipment very good dielectrical properties high tracking resistance good primerless bonding to a silicone elastomer Application: POWERSIL® XLR® 620 A/B is the right choice for economical production of large articles like cable accessories and hollow core insulators with suitable mixing and dosing equipment. Because of its extreme low viscosity the use of a highcost injection moulding equipment is not necessary, but of course possible if wanted. Due to the outstanding electrical properties POWERSIL® XLR® 620 A/B is an insulating material for indoor as well as for outdoor use. Information provided by Wacker Chemie AG.
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Physical Properties	Metric	English	Comments

Density	1.10 g/cc	0.0397 lb/in³	ISO 1183-1 A
Viscosity	15000 cP @Shear Rate 10.0 1/s	15000 cP @Shear Rate 10.0 1/s	Component A; ISO 3219
	15000 cP @Shear Rate 10.0 1/s	15000 cP @Shear Rate 10.0 1/s	Component B; ISO 3219
	15000 cP @Shear Rate 10.0 1/s	15000 cP @Shear Rate 10.0 1/s	Mix; ISO 3219

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	33	33	ISO 868
Tensile Strength at Break	6.00 MPa	870 psi	ISO 37
Elongation at Break	400 %	400 %	ISO 37
Tear Strength	15.0 kN/m	85.6 pli	ASTM D624 B

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+15 ohm-cm	1.00e+15 ohm-cm	IEC 60093
Dielectric Constant	2.8 @Frequency 50 Hz	2.8 @Frequency 50 Hz	IEC 60250
Dielectric Strength	>= 23.0 kV/mm	>= 584 kV/in	IEC 60243
Dissipation Factor	0.00050 @Frequency 50 Hz	0.00050 @Frequency 50 Hz	IEC 60250
Arc Resistance	>= 300 sec	>= 300 sec	IEC 61621

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

Processing Properties	Metric	English	Comments
Cure Time	5.00 min @Treatment Temp. 165 °C	0.0833 hour @Treatment Temp. 329 °F
Pot Life	1440 min	1440 min

Descriptive Properties
Color	transparent
Track Resistance	1A 4.5		IEC 60587

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PWACK9397 / 204926

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