Hive top feeder sealant?

[Davzbeez]

I've read several threads that sugest sealing a hive top feeder's joints with melted wax.  Would silicone caulk be a viable alternative?  What about sealing all the inside surfaces?  I'm thinking some kind of polyurethane, or is that not necessary because the sugar water will coat is soon enough?

[Kris^]

The top feeders I made earlier this year tended to leak, even after using silicone caulk.  The ones I recently made don't leak.  For them, I used lots and lots of glue between the boards, then sealed the reservoirs with several layers of shellac.

-- Kris

[Davzbeez]

Ok, I'll try that.  I guess tight assembly tolerances will make a difference too.