hatch sealing

Can someone steer me to Flatpicks message on sealing a kayak hatch? I think it is a pretty old post. I tried a search and nothing showed.

This would appear to be it.
He is “old_user”


Depends entirely on the hatch
What caused a VCP style hatch fram to leak on a old Necky Chatham is totally different than what caused old Tempest hatches to leak. One was poor assembly one was poor design.