Don't forget to mix some chilli peppers in with the sealant to keep him from munching on it in future!
Naw, you don't want really to re-silicone your tank andd probably don't have to. Neither would I quite agree with Rusty that a royal is not a suitable aquarium fish, though it definitely IS a high maintenance fish that is not for the faint of heart.
Maybe what your royal is trying to tell you is that it would like wood wih a softer texture. When we had hard wood (the kind that sinks naturally) in our tank, the royal wood (sorry, make that "would") start chewing on other stuff, like the sealant and the sponge on the power head. Once we got softer wood in there, this behavior seemed to stop. On the other hand, he managed to eat through a huge stump in a couple of years, to the point where there was just a little sliver left. We were cleaning our filters out as often as twice a day! Worse than changing diapers

.
Dinyar