I have a wall-to-wall crack in my basement concrete floor. The crack
is fairly uniform in width, about 1/8" or less, and travels in a
somewhat random path. I've already cleaned the crack and surrounding
area with household ammonia and water, and plan to clean it again with
vinegar. After it completely dries, I plan to fill the crack with
gray concrete caulk. Is this the best way to seal a concrete floor
crack?

This area will be used as a full bath/laundry room and no floor
covering will be installed. Two radon tests were performed, with
results less than 1/10 below allowable levels, so I'm doing this for
appearance and any possible spills. TIA