Wacker Elastosil® LR 3856/20 A/B Liquid Silicone Rubber

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Wacker Elastosil® LR 3856/20 A/B Liquid Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber; Liquid Silicone Rubber (LSR)
Material Notes:	High oil-bleeding liquid silicone rubbers of the ELASTOSIL® LR 3856 series are paste-like, easily pigmentable two-component products with short curing times and very good demoldability (high hot tear resistance). Shortly after curing a thin oil film with lubricating properties forms on the surface. The vulcanizates are opaque, have very good mechanical and electrical properties, excellent cut resistance, and low compression set without post-cure. Properties: The products can be used within a temperature range of - 55 °C to + 210 °C. The addition of heat stabilizers at service temperatures of more than 180 °C is recommended. Application: ELASTOSIL® LR 3856/20 A/B is particularly suitable for the economical production of electrical connector seals and mat seals for the automotive industry. Information provided by Wacker Chemie AG.
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Physical Properties	Metric	English	Comments

Density	1.08 g/cc	0.0390 lb/in³	ISO 1183-1 A
Viscosity	600000 cP @Shear Rate 0.900 1/s	600000 cP @Shear Rate 0.900 1/s	DIN 53019

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	22	22	DIN 53505
Tensile Strength at Break	6.20 MPa	899 psi	DIN 53504 S 1
Elongation at Break	850 %	850 %	DIN 53504 S 1
Tear Strength	16.0 kN/m	91.3 pli	ASTM 624 B
Compression Set	18 % @Temperature 175 °C, Time 79200 sec	18 % @Temperature 347 °F, Time 22.0 hour	DIN ISO 815-B

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	210 °C	410 °F	with heat stabilizer
Minimum Service Temperature, Air	-55.0 °C	-67.0 °F

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

Descriptive Properties
Appearance	opaque

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PWACK9165 / 204694

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