Abstract: A manhole sealing device and method for sealing a frame-chimney joint between a manhole chimney and a manhole cover frame. The device comprises an annular ring defining a narrow annular space adjacent the frame and the chimney and across the frame-chimney joint, and a flexible water resistant cement filling the annular space and adhering to the annular ring, the frame and the chimney. In one embodiment of the invention, the ring is comprised of a plurality of segments. The ring segments are held together by slip joints and the ring includes an expansion joint to permit the adjustment of the annular space. The annular ring further includes a plurality of horizontal retainers secured in the frame-chimney joint for securing the ring adjacent the frame and the chimmey.