Abstract: A cover panel for closing a roof opening has a panel body, a support frame for the panel body, and a seal member having a substantially rigid mounting portion mounted on an edge of the support frame and extending around an outer circumferential edge of the panel body, and a resilient hollow seal portion for engaging the outer circumferential edge of the panel body. An arrangement is provided by which water passing between the seal portion and the circumferential edge can pass be drained away. Furthermore, a glass support portion of the seal member is bifurcated, having a flexibly hinged upwardly angled flange portion that is deformed downward upon placement of the glass pane to insure correct Z-axis (vertical) positioning of the glass pane forming the panel body and to prevent adhesive from flowing between the panel body and the seal member.