I tape all of mine with the exception of my hydro. It's a replica of the '75 Ms. Weisfields. Since I have two radio boxes I siliconed them down and added a breather on top. You'll need a breather to let the condensation out or your lid gets foggy.
People say don't do it BUT it's the only box I've never, ever had problems with, no corriding as everyone said I'd get or weak charges, etc....I open it every 6 months and then reseal it.