[quote=toddelozory]The sealants used in insulated glass, and in glazing windows is similar, but not under the waterline.
In insulated glass, the semipermiable membranes are allowing the migration of watervapor into and out of the unit, depending on the pressure and osmosis. Submerging the sealant would allow the water vapor to move from outside the hull, an area of greater concentration, to inside the hull, an area of lesser concentration. Over time, sealed insulated glass will accumulate watervapor. When the accumulation exceeds the unit's dessicant's saturation point, the glass fogs. There is no dessicant inside your hull, but there is a drain plug. I would reccomend Dow Corning 797 for sealing above the waterline, and the Dow Corning Marine Silicone for anything below the waterline.[/quote]
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