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.  

Now that the floor is very clean, the enzymes should penetrate the floor with ease.

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).  

.$  30.00*Pet urine and feces on the tiled floor**2 hours of cleaning………………………………………$ 150.00**Spot Comp Pet - enzyme cleaner.……………….…….$     4.49**Pet Odor Eliminating Spray………………………..........$     3.98*                                                                    Total          $ 2508.47                                                       Minusdeposit     $  995.00                                                         Total……………$1513.47                                           Discounted total if paid by Oct 20...$ 999.53We are willing to drop thefees in asterisk lines items if this can resolved by Monday the twentieth ofOctober, 10/20/2014.

I have used two gallons of enzyme cleaner, smell still remains pretty potent.

The way it works is by enzymes - they "eat" the bacteria from the cat pee- which is where the smell comes from.

You'll need to soak the garage floor to let the enzymes in the product soak into the floor, just like the dog urine did.  

We close on it next Wednesday and I have done quite a bit of research on how to get out the smell.I purchased a product called " Mister Max Anti Icky Poo" weird name I know, but this is an enzyme that will break a lot of the chemical bonds in the urine.