Wacker Elastosil® R plus 4020/40 Silicone Rubber

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Wacker Elastosil® R plus 4020/40 Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber
Material Notes:	ELASTOSIL® R plus 4020/40 is a one-part platinum catalyzed addition-curing silicone rubber for manufacturing molded articles. Cured articles show excellent transparency and very high tear resistance. Application: ELASTOSIL® R plus 4020/40 is suitable for the manufacture of molded articles. Properly post-cured vulcanizates of ELASTOSIL® R plus 4020/40 can be used for food contact applications and are suitable for use under the Recommendation "XV. Silicones" of the BfR and FDA § 177.2600 under observance of any given limitations on extractable and volatile substances. Information provided by Wacker Chemie AG.
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Physical Properties	Metric	English	Comments

Density	1.14 g/cc	0.0412 lb/in³	ISO 1183-1 A

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	39	39	DIN 53505
Tensile Strength at Break	10.9 MPa	1580 psi	DIN 53504 S1
Elongation at Break	1007 %	1007 %	DIN 53504 S1
Rebound	48 %	48 %	DIN 53512
Tear Strength	51.0 kN/m	291 pli	ASTM D624 B
Compression Set	38 % @Temperature 175 °C, Time 79200 sec	38 % @Temperature 347 °F, Time 22.0 hour	DIN ISO 815-B

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

Processing Properties	Metric	English	Comments
Cure Time	15.0 min @Treatment Temp. 165 °C	0.250 hour @Treatment Temp. 329 °F	post cured 4h/200°C

Descriptive Properties
Appearance	transparent

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