Wacker Elastosil® R plus 4370/40 Silicone Rubber

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Wacker Elastosil® R plus 4370/40 Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber
Material Notes:	ELASTOSIL® R plus 4370/40 is a self-adhesive addition-curing compound for manufacturing of extruded, coated and molded articles. It adheres to steel, aluminum, thermoplastics (e.g. BT) with good heat deflection temperature and synthetic fibers (such as Polyester), as well as to other silicones without any primering or special surface treatments. Application: ELASTOSIL® R plus 4370/40 is intended for the manufacture of 2-composite combinations via pressure free extrusion or co-extrusion. They can generally be used for technical applications without post-curing. Information provided by Wacker Chemie AG.
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Physical Properties	Metric	English	Comments

Density	1.14 g/cc	0.0412 lb/in³	DIN 53479

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	40	40	DIN 53505
Tensile Strength at Break	9.40 MPa	1360 psi	DIN 53504 S1
Elongation at Break	890 %	890 %	DIN 53504 S1
Rebound	55 %	55 %	DIN 53512
Tear Strength	34.0 kN/m	194 pli	ASTM D624 B
Compression Set	50 % @Temperature 175 °C, Time 79200 sec	50 % @Temperature 347 °F, Time 22.0 hour	DIN ISO 815-B

Processing Properties	Metric	English	Comments
Cure Time	15.0 min @Treatment Temp. 165 °C	0.250 hour @Treatment Temp. 329 °F

Descriptive Properties
Appearance	translucent

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PWACK9297 / 204826

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