A sealing apparatus includes a housing mountable to an elongate shaft having an axial lumen, a sealing element mounted within the housing and having a dome portion with an opening for passage of an object and at least partially defining an arcuate pathway within the housing, and a sealing member defining a cavity for receiving the object in sealing relation therewith. The sealing member is partially disposed within the housing, and is supported in direct contact with the dome portion of the sealing element. The sealing member is adapted to form a substantial seal with the sealing element, and to spherically move through the arcuate pathway relative to the sealing element upon offset manipulation of an object.