Reseal.. is it worth it?

I've got a 55g with a 36x18 footprint. Its an old tank with some pretty thick glass. I noticed on a few of the seams particularly at the bottom of the tank along the sides that there looked to be mold or something between the silicone and the glass. I have since removed all the silicone with the exception of the stuff between the panes of glass. Is it worth getting sealant or adhesive and redoing that much, or is it just a ticking timebomb? The tank isn't worth completely pulling apart and redoing from scratch, as its definitely a fishroom only tank.
I only need the tank to last until my next upgrade within the next year or so.. (but we know how those plans sometimes go)

Thanks for the advice. The glass is a bit scratched but it is really thick (takes 2 people to carry it empty!), which makes me want to hold onto the tank if I can, plus its a slightly oddball size. I'll redo the fillets and see how it holds.