Tsp or trisodium phosphate is a heavy duty cleaner that penetrates porous concrete.
Treat concrete for urine under carpet.
Instead of drawing the urine to the top of the concrete tsp soaks into the floor and neutralizes the urine there.
Next apply and scrub in enzymatic cleaner to remove odor.
If sealing floor you might use some of the new garage floor paints comes in several colors.
A 3 percent hydrogen peroxide solution spray it on let it sit for a few minutes and blot dry.
Dry and deodorize residual room urine smells with an ozone generator.
Concrete is porous like glass.
Next get buckets of warm water and broom detergent sprinkle detergent in small areas small amount of water and rub into concrete sort of like cleaning pots pans let set for awhile than mop up it takes time but works.
Cover with plastic sheeting for 1 to 2 hours to slow the evaporation rate of odorzyme and allow time for the first application to soak deeply into the concrete.
Note that as the first application of odorzyme goes to work the urine odor may intensify at first.
Instead what is often left behind is course sections of dried adhesive that have bonded to the concrete floor in such a way that they are.
Here are some possibilities.
First a dry enzyme powder is mixed fresh with water.
Peroxide dish soap and baking soda.
The second step is to pour the accompanying gentle peroxide solution over the stain.
This solution changes the stain and odor into an evaporable gas of water and oxygen.
First clean spots with a two to one vinegar and water mixture tsp or hydrogen peroxide and rinse off concrete.
Unfortunately when you remove the carpeting to replace it the adhesive usually does not come off with the carpet in all areas.
To remove the tsp and urine you can use a shop vac to suck out the substances.
Carpet that is attached to a concrete floor is usually held down by adhesive.