Forward hatch detach

Aug 20, 2012
33
Catalina 25 Punta Gorda
In the process of opening the Bomar forward hatch on my '89 Cat 25 the white plexiglass detached from the frame. It appears that there is a rubber gasket below the plexiglass that only serves to act as a cushion. In the area between the glass and the metal frame is a white substance that acts as a calk and or adhesive.

Does anyone have any idea what that material is? Should I replace it with 4200, 5200 or what? Thanks for your help.
 

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