Question about upper and lower boom caps and sealing

I installed new top and bottom caps on the mast yesterday. The bottom cap was missing on the Sunfish I bought.

Now I want to replace a cap on the lower and upper boom that are damaged. When doing this do you try to seal the booms like you do the mast plugs? I sealed up the mast well, but I am unsure if I am to try to seal the lower boom. It would seem to be a futile effort given the through bolt on the front of the lower and upper boom to tie them together. What do you guys do?