Plywood tank question

[carnophage]

I have been doing some research on these DIY plywood tanks, and on a couple sites people have used this liquid rubber to seal the tanks. It sounds like it would work for freshwater, but i am a bit skeptical about putting it into a marine environment. Does anyone have any experience building one of these tanks and using liquid rubber? I have seen fiberglass and epoxy ones. Links, photos, or just experience would be a great help, Thanks!

 

[JBarnes]

I'm starting one this Spring and I've decided to go epoxy with fiberglass tape in the corners. If you read the liquid rubber threads you'll see a couple of the folks say they would use epoxy next time. The liquid rubber is difficult to color and there is some concern about urchins etc. eating through the rubber coating. Epoxy is more expensive but I believe it is a more durable finish that will hold up over the long haul. Jerry.