borax might work too. check the box for uses. i know it cuts gas and grease from laundry and kerosene is oil based. but i'm not sure if it would discolor the cement.
I just ripped up all my basement carpet yesterday due to dog urine smell - YUCK! A friend suggested mopping with bleach to remove the smell then applying a sealant. Maybe that would work for you too.
Have you tried clay kitty litter? Just spread it on, let it stand for a couple of days, and then sweep it up. Or black and white newspaper pages might soak it up, too.
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