re. glue on ends -- if you used a water based glue, it certainly will take long to dry, as the wood was presumably green, and moisture can wick out the ends........
reccomendation-- .for cut ends, nothing is as water and vapor proof as wax. Here in the U.S. paraffin wax is easy to find for canning, In the UK "paraffin" means something else....what we call "kerosene" here. I don't know what it would be called where you are. Candle wax is similar and would work, too.
It's super fast to apply, I just put chunk into a small soup can, and set it in a small saucepan with an inch of water in it to serve as a double boiler. Heat gently a couple minutes until the wax is just melted and brush on the wood ends. No waiting for glue to dry. (Never heat wax directly over an open flame, always use a double boiler.)
Plywood potable water tanks have been built with a paraffin wax coating on the inside in boats. Paint is nowhere near as water (and vapor) proof. Wax is used for canning for the same reason. It's a perfect sealant against moisture.