Abstract: The use of a sulphur-free and low-emission elastomer blend which has properties of various rubbers, and the mechanical properties thereof are improved, in particular, in relation to the permanent set (DVR), elongation at rupture, tensile strength and/or gas permeability (permeation) in relation to the individual compounds, and it also has an improved temperature resistance and an improved resistance to media. The elastomer blend also includes a rubber having at least two functional groups which can be cross-linked by hydrosilylation, at least one other rubber comprising at least two functional groups which can be cross-linked by hydrosilylation. The rubber is chemically different from the rubber and a cross-linking agent includes a hydrosiloxane or hydrosiloxane derivative or a mixture of several hydrosiloxanes or derivatives, which include at least two SiH groups per molecule in the centre, a hydrosilylation catalyst system and at least one filling material.

Abstract: A radial shaft-sealing ring with a sealing (1) ring made of a polymer with sealing properties, rubber for example. The sealing ring has at least one lip (2) that rests on the shaft (4) against a backing ring (3) at the side not subject to pressure. The lip is permanently fastened to a reinforcing ring (5). The cross-section of the reinforcing ring in accordance with the invention is L shaped with at least one wall that extends radially inward and rests against and partly covers the backing ring.