Dog Urine In Grout

dog urine in groutToday my wife started out the day cleaning the grout in our kitchen tile. We have a pug named Betty and her brother (Rumble) has been over visiting. He is not as good as Betty about waiting and urinating outside. He has been visiting for about two weeks and we now have a build up of urine stains in our white (off white) grout. We had stains in the grout already but not real bad. With Rumble It was looking and smelling bad enough for her to decide she had to clean it up. She first tried a strong alkaline cleaner which helped a little but she was not satisfied at all. Then she tested several products to see what would clean the dog urine out of the grout. She tried bleach and she tried an acid cleaner. These were after the alkaline cleaner. It got a little brighter with each process. Then she got a hydrochloric acid product from a professional stone chemical company.  This had a strong smell and she had to wear gloves but she reported that this cleaned up the grout fast and easy and she was thrilled with it. It brightened and whitened the grout right up. It took the urine and everything else that was making the grout dingy out and now it looks like new. It took a little time for the smell of the acid to dissipate but after it did she applied two coats of grout and tile sealer so the future urine would bead up on the grout instead of absorbing in. The hydrochloric acid product did the trick for our dog urine in the grout situation. It cleaned everything else out of the grout at the same time.

3 thoughts on “Dog Urine In Grout”

  1. Hi,

    I have a question?

    I just had my new slate installed on Thursday April 29th, We have a dog that likes to piss on everything was told by the installer that after 72hrs we could seal it. Well we let the dogs in the room for a few so they could play and our dog urinated on the slate and grout before sealed what can I do to get the stain out and the smell if there is any? Is it to soon to use anything on it cause its new?

  2. Carrie
    There are products that deal with both the stain and the smell. Oxidation products and enzyme products are two that will do this. Sometimes the urine stain will be stubborn and will not completely be removed by these. So you can use a product that is designed specifically to remove the stain only. has all of these. If the urine has bleached (lightened the color in the grout then these will not help). If your grout is white you can use stronger bleaching chemicals to remove the stain. You can also use a grout saw and remove a small area of the grout (surface only if you like) and replace with new grout. You should be able to match it if it was recently done as you described. It should also be fairly easy to remove if recently done. The newer the grout is the easier it will soften up when wet. If it is under 24 hours old and you do not want to remove the grout then just be gentle as you work on it. The stain might disappear when the urine dries. The stain could simply be from the grout getting wet. The urine is still in there it is just not visible.

Leave a Reply

Your email address will not be published. Required fields are marked *