It will help, but don't apply the sealant as a glue or your beams will indeed be very hard to remove. I have personally made that error on my own F16.

Use just a tab of sealant around the bolt holes, more like putting down a very thin ring of sealant.

When the bolts are tightened the space between hull and beam will become very small and even the little sealant that you have put on their will quickly spread over a large area. And when a square cm of sealant take only 100 grams to break off then the hole beam landing being sealed up will still take several tens of kg's before you can remove the beam after unbolting it.

Been there, done that and you'll be amazed how much load a widely spread out simple sealant can take before failing. My timber hulls were making all kinds of heavy cracking sounds before it popped. So the less sealant you use the better.

Wouter