Thanks redm18, I believe it is epoxy resin and then gel coat.
GODZALLA, the glass is placed behind a 2" wooded frame which is also fully sealed with the fiberglass and resin on the inside of the tank and sealed with silicone. So there is no pressure on the glass and silicone.
GODZALLA, the glass is placed behind a 2" wooded frame which is also fully sealed with the fiberglass and resin on the inside of the tank and sealed with silicone. So there is no pressure on the glass and silicone.