As Gunner mentioned, Sikaflex has adapted the systems used for autos and office buildings to boats. "Direct bonded" glass is now used in ocean going commercial
ships and CG patrol boats. It's supposed to be stronger than traditional framing and far less prone to stress fractures or problems from flex. Also, no holes to leak.
The "catch" if I understand it, is that you're supposed to put a 1" wide black ceramic stripe called a "frit" around the edge of the window to protect the sika from UV. You can see this on any car windshield. You need to have a glass company put this on for you as it is baked on. Evidently, anyone who tempers glass can also put on the frit. (I am way out of my depth
here - if anyone understands this speak up)
Sika has a detailed guide on their site aimed at boat builders called "Marine Direct Glazing" that you can download.