Abstract: A mechanical sealing assembly for establishing a water-tight, rodent/insect-proof seal between a plurality of elongated members (e.g., cables, tubes, etc.) and a conduit carrying the elongated members. The sealing assembly includes a resilient, compressible, cylindrical rubber bushing and a pair of flat plates on opposite sides of the bushing. The bushing has a plurality of longitudinal receiving openings therein and a plurality of radial slots extending from the perimeter of the bushing into the receiving openings for enabling the elongated members to be forcibly inserted by way of the slots into the receiving openings. Each of the flat plates includes several sections which are assembled together in an interlocking fashion to surround the elongated members and define openings for the passage therethrough of the elongated members.