Dressing seal with interlocked muff

摘要

The seal has a seal ring (5) and a fixing projection (10) in the peripheral direction of the ring zone which faces the internal face of the concrete wall (1). The projection is inbedded in the concrete during its casing. The seal has a collar (7) thinner than the ring and applied to the concrete internal face (6) between the ring and the concrete stop. Viewed from the thin end, the fixing projection is in front of the sealing ring deformation part. The collar is behind this deformation part, while a rib like turning bearing piece (12) projects radially inwards from the collar.