Does filler make the floor water tight?

Q: We have a few gaps between boards where the filler has popped up. I don’t mind filling it again (and again as needed), but I am wondering if doing so makes the floor water-tight (or as water-tight as it can get). I ask because I love my Scooba floor cleaner, but it can only be used on hardwood with no cracks.

A: There should only be slight amounts of water used on any wood floor. By slight I mean a dampened or rung dry cloth. Filler won’t make a floor “water tight”.