what type of caulk have you 272 owners used to repair small cracks in the caulk of the 272 replacement hatches sent by O'day quite a few years ago....maybe by Rudy @ D & R also....the plexiglass is not cracked but a bit of the caulk has separated from the plexiglass..the caulk, probably black, but could be dark gray too...that would work.....thanks for any suggestions