It is an enzyme-action product that breaks down the urine into components that do not have an odor.

Then you spray the concrete slab with an enzyme that eats the urine out of the pores.

As said, I tried everything that I could think of (ozone generator, leaving windows/doors open for days, pouring bottle after bottle of cat urine enzyme cleaner, scrubbing the floor, and other solutions).

They often sell a product that will neutralize cat urine.Clean with a vinegar solution first, then treat with the enzyme cleaner.

Spray with a probiotic enzyme....let set for 3 days than ozone overnight with all cabinets open and air conditioner on to pull thru ductwork.

try using an enzyme cleaner (like for skunk sprays) to clean the subfloor thoroughly and then seal the subfloor with Zinner bin shellac.

I have another cleaning company who uses an enzyme product that they promise will absorb any odors.  

.), they quickly deteriorate the concrete components and cause failure.6) Adding various enzymes and bacteria is up for debate.  

Lesley:If the problem is not too severe ... ie. the urine is not completely absorbed into the subfloor and/or walls ... there are concentrated enzyme products you can order on-line (the name of the one we used escapes me at the moment).  

I haven't had much success with ozone generator as they only clean the air and not the enzymes themselves.