My windows leak, and my boat fills up. The windows were added by a previous owner, they're adhered with some kind of rubber, but it's come loose in several places. I plan to drill holes through the panes and fiberglass, remove the panes, clean the surfaces, apply a sealant, replace the panes and screw bolts through the pane and the fiberglass. Does anyone have feedback on this approach? Could you recommend a sealant? Sikaflex 291 seems to be an option - though it doesn't seem to be recommended for plexiglass ("Sikaflex®-291 must not be used to seal plastics that are prone to stress cracking (e