The tub guy gave us a little bit of a hard time since all the acid would run down into the basement (no drain hooked up)— we created a makeshift funnel for the acid to funnel into a container so we could get the job done right.

The pee is so acidic (and liquid) that it can seep into the joists or slab and there is no amount of neutralizer that will get it out.

Its been kicking my *** without AC.

Some makeup or cleansers do have acid in them and it can bleach out any colored towels. so we stock are bathrooms with makeup wipes. 

Or it could have been boric acid.

I would acid wash it to clean it up and seal it with a low luster stone sealer.

Boric acid is what you want for residual roach killer. 

with BORIC ACID, cut some 1 inch by 1 inch squares of light cardboard, like shirt cardboard and make a thin SANDWICH out of the paste.Put these around the kitchen and bath, inside of cabinets, very effective.BTW, the "mix some from another pile" thing with fire ants actually doesn't work.