I have a concrete floor that has been heavily saturated in dog urine. I was wondering if there were any cleaners that were highly recommeneded to remove the urine from the concrete. I am in the process of a TSP wash of the entire floor. I know I need an enzymatic cleaner, but all I can find is Rocco and Roxie type stuff (weak natural type cleaners). I need some industrial strength type cleaner. Also, I know this is a noob question, but can you tile over an oil based kilz type primer? I'm very concerned about the urine smell permiating through the new tile. Thanks in advance for all the help!