: Glass/epoxy isn't 100% waterproof specially in very thin layers like we use,
: water vapor at minimum will freely pass thru it.

True, but with both sides glassed does it matter? Isn't the glue just to hold it together till it is glassed? The only downside I am seeing is it might make ugly glue lines down the road.

Again, just curiosity. Not arguing. Just trying to learn something.