Dog urine on cement may dry, but the smell will linger, because porous concrete soaks up the urine. Once your dog urinates on concrete, take time to remove and clean it to prevent urine stains from sticking to the concrete. You can remove the urine from the concrete with common household items, but if the dog regularly urinates on the concrete, you may have to resort to commercial enzyme cleaners.
Locate urine stains on the concrete with a black light. Hold the light 3 inches above the concrete and search for any stains that glow so you can focus on cleaning these areas.
Combine ½ gallon of white vinegar in a large bucket with 4 cups of water. If you need a large amount of this solution, mix together 2 parts of vinegar with 1 part of water.
Soak a bristled scrub brush in the bucket. Scrub the urine areas in a circular motion. Continue to soak the scrub brush in the vinegar solution and scrub the area thoroughly.
Sprinkle baking soda over the vinegar. Allow it to sit for 10 minutes, then scrub to create a paste that will absorb the odours and draw out any moisture.
Apply a commercial enzyme cleaner to the area for heavy stains. Follow the directions on the product carefully.
Rinse the areas with a water hose. Spray urine areas to push the solution off the cement.