hoorenga":28jj1l00 said:
After considering a lot of different options I am down to a suggestion from my local glass shop. The fellow there suggested that I place a gasket material in the opening. This stuff is used on tractor cabs and such and has a grove that the edge of the fiberglass would slip into. A bit of silicone injected into the grove would create a water tight seal between the gasket and the fiberglass.
I could see that working well (minus the silicone, IMO). If you are talking about the self-sealing rubber gaskets with the bead (lockstrip) that look like the ones I show below, then they are used on fiberglass campers, fiberglass boats, school busses and etc. to hold the windows in (on the campers/boats I know of they are used with a plastic window material, not a glass one, but perhaps it depends on how flat the pane can be).
I'm sure there is more than one company that makes it, but C.R. Laurence is one, and you can get each side of the gasket in different thicknesses (to accommodate the boat fiberglass thickness and the window thickness separately). They don't sell direct to the public, but glass suppliers, etc. can get it. Note that you buy the lockstrip separately, and also that a lockstrip tool (bought or homemade) and some soapy water makes the process go easier. The gaskets like this that I know of are not installed with any sealant or caulk, but rather onto clean glass/plastic.
This isn't typically as "sophisticated" as framed ports, but it is a known way to install inoperable windows, and has a tidy, "non-homemade" appearance.
Lockstrip:
I tried to put in a link to these products on CR Laurence's page, but that caused my post to come up completely blank each time (must've been some character in the long link (?). So here is a link to their main page, and the gasket parts can be found under "automotive products" and then "auto glass weatherstrips and moldings." The parts shown are "two piece self-sealing weatherstrip" and "Locking strip for self-sealing weatherstrip."
http://www.crlaurence.com