Wacker Elastosil® R plus 4305/40 BXF, RBR, 20 Silicone Rubber

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Wacker Elastosil® R plus 4305/40 BXF, RBR, 20 Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber
Material Notes:	EL R Plus 4305/40 BXF,RBR,20 is a platinum catalyzed addition-curing, two-part silicone rubber for manufacturing extruded articles. Cured articles show an excellent transparency and good to very good mechanical properties. Application: EL R Plus 4305/40 BXF,RBR,20 is suitable for use under the Recommendation XV. Silicones of the BfR and FDA 21 CFR §177.2600 "Rubber Articles Intended for Repeated Use" provided that the product is appropriately cured/ post-cured and the respective limits for extractable/migrating or volatile components are met. Information provided by Wacker Chemie AG.
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Physical Properties	Original Value	Comments

Density	1.13 g/cc	ISO 1183-1 A

Mechanical Properties	Original Value	Comments
Hardness, Shore A	40	DIN 53505
Tensile Strength at Break	9.80 MPa	DIN 53504 S1
Elongation at Break	850 %	DIN 53504 S1
Rebound	56 %	DIN 53512
Tear Strength	30.0 kN/m	ASTM D624 B
Compression Set	18 % @Temperature 175 °C, Time 79200 sec	DIN ISO 815-B

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

Processing Properties	Original Value	Comments
Cure Time	15.0 min @Treatment Temp. 165 °C	post cured 4h/200°C

Compliance Properties	Original Value	Comments
FDA	Yes	See notes for details.

Descriptive Properties
Appearance	transparent

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PWACK9283 / 204812

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