How to Remove Dog and Cat Urine Smell from Concrete

Use this method to get cat urine out of concrete and remove it permanently

So you have a concrete floor, perhaps an area in your basement, garage, patio or under your carpet in your home that seems to be permanently stained with pet urine, a.k.a dog or cat pee.

You can smell or see pet urine stains that no matter how much you bleach or wash with vinegar don’t go away.

It’s as if you have to settle with the fact that once dog or cat urine has seeped into concrete, it’s there forever.

What’s worse is the area seems to give off a permanent urine odor, constantly releasing odorous and offensive fumes.

Let’s take a look at how we can remove dog and cat urine smells from concrete the right way to make sure you have clean smelling floors again.

 

Directions to Remove Dog Pee or Cat Urine Odors from Concrete:

Here’s a quick summary of what you’ll do to rid your house of foul odors. Notice the first step is to locate specifically where your pets have peed in your garage, basement or living quarters. 

Your pre-step is to use a black light to find these stubborn stains. Keep in mind that liquid can spread, so you’ll be treating even beyond the places you see. 

First, clean spots with a two-to-one vinegar and water mixture, TSP or hydrogen peroxide and rinse off concrete. Next, apply and scrub in enzymatic cleaner to remove odor. Then, cover cement and let area sit and soak overnight for 12-24 hours. Dry and deodorize residual room urine smells with an ozone generator. Now, your floors will never be cleaner or smell better!

Steps for to remove urine off concrete

 

Get Started

Before we get to the real magic, here are some basic facts about concrete, liquid and well…pee.

This knowledge will help you understand why the remedy we cover below works so incredibly well to get cat pee out of concrete, especially.

Why Urine Is SO Bad for Concrete

As you already know, concrete is dry and hard as rock. Among concrete’s properties, it’s also a relatively porous material.

This means, that water and other liquids that comes into contact with bare (unsealed) concrete will saturate concrete for sure.

Usually this is harmless, but when it comes to pet urine it is obviously not good.

Urea from dog or cat pee goes into concrete, breaks and releases smelly odors

Dog or cat urine can seep through even a small area and get worked down in concrete on it’s own; and anyone who has had cats or dogs knows that an animal urine stain can be difficult to get rid of from your garage floor, basement flooring and under carpet pads.

What’s worse is this potent stuff can lie dormant inside the concrete for years, only to keep releasing its odor when moisture gets back down into the concrete.

The fumes will find their way into anyone’s nose who is in the area. Yuck!

Why Cleaning Isn’t Enough

You’ve probably discovered you can’t just “clean” off pet urine with water or whatever concrete cleaner you’re using.

You must get it using a series of steps, each one playing a role in ridding the urine smell from concrete once and for all.

When you’re looking at how to get cat pee out of concrete, especially, it’s not a project to take lightly in most cases!

Let’s get to the steps below…

You’ll be happy to know that cleaning the surface of urine stained concrete is the first one. So you’ve done this, while it may not have worked, it wasn’t a waste of time!

Find ALL Urine Spots for Best Results

To really help you identify and pinpoint not just a stain but all of the offending urine spots it’s important to use a black-light.

This is specialized flashlight made just for pet urine detection and reveals any of the urine spots on your concrete.

Black light emits long-wave (UV-A) ultraviolet light, and urine stains new and old will glow brightly when subjected to this light. This makes it super helpful for you.

In extreme cases…

If you suspect dog or cat urine is highly prevalent in your treatment area, the best method is to clean and plan to treat the entire surface of the concrete in question so you don’t miss any hidden spots.

Covering a broad area will also ensure the cleaning will be consistent across your flooring and make sure all unwanted odors will be gone.

Now the steps…

STEP 1 – Prepare and Clean Concrete

First, thoroughly clean all concrete surfaces with one of the following household cleaners. In each case, allow to sit for several minutes. Then wash with soap and hot water and let surfaces air-dry normally.

What you’re really doing here is preparing the concrete for Step 2, to maximize the effectiveness of the enzymatic treatment.

Be sure to scrape off any old residue attached to the floor, including removing old carpet glue. This can made the treatment process harder as it gets in the way.

Vinegar Wash

Vinegar is strong, so you can get by with two parts vinegar and one part hot water water mixture. This is a good neutralizer.

Trisodium Phosphate (TSP) Cleaning

Add in 1/2 cup of trisodium phosphate (tsp) crystals per one gallon of hot water. The TSP mixture is potent, so wear protection like rubber gloves and work into stained area. The solution and will break down bacteria in the stain as it sits.

Hydrogen Peroxide

A good first-pass cleaning solution; make your recipe and add two cups of hydrogen peroxide with two tsp of baking soda and two drops of dish soap. Once mixed, you can pour over affected areas and let soak. 

STEP 2 – Treat the Urine Stain

Second, use a special cleaning solution to permanently dissolve and remove bacteria and stains like uric acid and odors from the top, and just below the surface, of your concrete.

Urine Cleaner we recommend:

Enzyme solution to remove cat or dog pee from concrete

1 Gallon Dog and Cat Urine Remover

This is an enzymatic cleaner that vets recommend because it’s safe to use in your home around your family and pets: Get it here for both cats AND dogs

They also stand by their guarantee that if the smell isn’t removed, you can get a full refund. You can’t beat that!

It works great on any concrete stain from dogs, and especially cats that have peed or sprayed (accidents or from marking territory) on hard, porous surfaces. Enzyme treatments have worked wonderfully for homeowners, vets and kennels.

Even if the pet accident occurred years ago, this stuff would and will always be a great odor eliminator.

It can also be applied to furniture upholstery, curtains, blankets, mattresses, clothing, carpet and carpet pads.

How to Use an Enzymatic Cleaner

The best way to use this for getting rid of pet urine on concrete is to make sure to spray it on heavily all across the cement surface.

You can also pour it out and spread it around evenly using a deck scrub brush like this one.

The idea is to get the top surface soaking with this enzyme cleaning solution.

As a note…

There is no need to dilute with water. Use at full strength.

The key is to allow it time to sit. Don’t just give a few minutes, give it a day.

You want it to really work its way down into the concrete and not evaporate too quickly into the air as it starts to dry. A day or even longer is absolutely ideal.

The more time the stain eating enzymes have to digest the odor causing molecules, the more effective this process will be.

Important:

To control the evaporation, make sure to lay a large plastic tarp or liner over the sprayed area. This will allow the solution to better penetrate into the urine stained concrete.

Allow to dry for as long as it takes, or at least 24 hours.

You can rinse the surface with water and use a wet-vac to vacuum up but this isn’t necessary since the nitrogenous wastes causing the stench have been chemically altered and no longer smell.

By the way, this type of cleaner comes in smaller (cheaper) sizes too for cats and dogs. should you not need to treat large areas or multiple rooms. These work on multiple surfaces including concrete.

And of course there are many other great products that work well for cat urine stains too.

STEP 3 – Protect from Future Accidents

When you’re sure you’ve cleaned and sanitized the top portions of your concrete areas as outlined above, and you’ve let everything sit and dry completely, you have the option of using a concrete sealer.

Seal Concrete to Protect It

Sealing will encapsulate and essentially seal your concrete flooring against moisture that can get inside and release what may be left of any missed urine stains.

It goes without saying that sealing will lock in any missed stain and keep odors from coming up again.

Sealing will also make for a great general protection for your floors for future accidents, as well as look a whole lot nicer. This will be better than paint.

The best sealer product?

Be sure to use concrete sealer with a good, anti-slip rating. A low-sheen is best as it allows for easy cleaning. Kilz makes a concrete sealer that is ideal for this kind of application.

The best part is you can choose a new color for your garage or concrete basement floor to get your floor looking just how you want, then seal it.

Okay, maybe the best part is your flooring will actually smell the way you want (not like urine), as you’ve now cleaned and sealed your concrete floor.

You can also sand the concrete as needed first, then paint on your sealers. In fact if you want to see a video of the whole process, this one is highly informative (done by a pet owner!), and covers all the steps:

How to Get Cat Pee out of Concrete: Preventive Guide

If you have a cat that frequently “misses” the litter box and leaves a wet or poop stain behind you can actually address this behavior. There are methods available to try and help solve problems such as your cat peeing on carpets.

One popular system developed by vet, Sarah Richards, is called “Cat Spraying No More™“. Click here to check out her page, and see how it can help you and your furry loved one. A lot of people have had success with it. Thanks, Sarah!

*Note: If you click through to her checkout page, then attempt to go to another page you’ll get a special discount offer. Definitely worth it!

Stop cat urination on concrete

You’ve now gotten rid of pet urine stains and smells from your concrete in the best way possible and have protected the area with a sealer for years to come.

BONUS: Rid Urine Odors from Concrete and Beyond

At this point in the process, you’ve cleaned and dissolved away as much of the smelly uric acid-containing crystals and stains as possible.

You may have even decided to seal your concrete as an extra measure against any future reactivation of odor and to protect for the future.

But is the smell gone in the room? Think you still smell something?

You may still smell urine depending on the specific areas and other physical elements within your house.

As with smoke, pet odors like urine can permeate into areas you can’t imagine and leave a prolonged residual, yucky scent.

What to do?

If you want to go the extra mile here and eliminate any possible left over urine odor in the room or house at large, it’s worth using an ozone generator.

These products are great; a small machine designed to deodorize the air along with any contaminated surfaces.

Just like enzymatic surface cleaners, it will neutralize and destroy odors at the molecular level AND do it 100% naturally free of harsh chemicals or odor masking scents.

If you’re at all sensitive to irritants that may be left over in the air, you’ll love this thing. Enerzen sells a good portable model at a decent price.

This truly will leave your home and living areas smelling pleasant again as it gets rid of any other smelly culprits as well such as mustiness or smoke that has penetrated nearby carpets or wall paint. Odors are just plain gone.

Dog or Cat Pee in Carpet?

If you have pet urine odor or stains in carpet and have tried using the typical cleaning products (like trisodium phosphate, bleach solution, vinegar, ammonia, rubbing alcohol, hydrogen peroxide, baking soda or others), then you should definitely try the enzymatic approach here too — just like with a smelly pee stain on concrete.

And as with concrete, you need something that will get in and penetrate the fabric (in the case of pet stained carpet), and break down the odor-causing elements of the stain.

Good news…

Bubba’s makes a wonderful enzymatic carpet shampoo solution that is as safe as water…for you, your pets and your rugs.

It works well to get dried cat urine out of carpet!

Using these products is a very small investment to pay for removing pet odors and urine stains! Plus, your nose will thank you.

Get Rid of Cat and Dog Pee Smells on Concrete for Good

This article was first published in 2009, and its information has helped thousands of pet owners solve this very common, stinky problem!

Learning how to get dog or cat urine off concrete requires a few steps if you want to be thorough and do it correctly:

First, clean it up. Second, add

Comments:

  1. nichole campbell says;
    10 Apr 2009 - 17:18

    Thank you so much for the info. I own 2 old staint bernards and one of them has lost control of her bladder at night. I tryed to clean with bleach thinking that would definately get the smell. Well, I almost poisened my self! I wasn’t aware the mixture makes a poisenoius gas. I’ll give this your suggestions a try.

    Thanks, nichole

  2. Karen H says;
    22 Sep 2009 - 10:34

    I just read your article; thanks. After cleaning the concrete, I’d like to have the floor tiled. Sealing the concrete as suggested won’t be possible for this reason. Will any lingering odors work their way through the tiles???
    Thanks.

  3. You are correct, for best adhesion of the tile and to prevent moisture trapping issues you’ll want to lay it over a bare slab. Your ceramic or stone tiling will do a great job creating a barrier to any pet urine left below. Anything “left” is dry and cannot seep back up to new materials. If you use the bio-enzymatic product step for step as described, you should not have any lingering smells anyway. Good luck!

  4. jackje says;
    06 Jul 2012 - 7:00

    If im going to re-tile the floor do i still need to seal concrete.

  5. Sealing won’t be necessary in this case. The tile and the grout will block any odor that might remain. But there *shouldn’t* be any odor left, so make sure you follow the instructions carefully and re-apply. Give the mico-organisms in the Urine-off time to devour any remaining urine molecules deep inside the concrete slab!

  6. I have cleaned the floor twice and its dry. the odor is still there. should I still seal the concrete? will the odor end then?

  7. You may still be smelling residual odors within the room or space. Sealing will only help, but if you still sense any kind of odor after sealing try the ozone generation treatment outlined above. This will help reduce those residual odors that may have been embedded in any other nearby materials. Good luck!

  8. Nancy says;
    24 Jan 2020 - 9:53

    My cat not only peed on the concrete but it pooed a lot also.I have cleaned my concrete floor with your 3step procedure and Icky poo but still have the odor. I have not sealed floor yet because I think sealing will not get rid of the smell. Am I correct? I think sealing will lock in the odor so it won’t ever go away. Am I right?

  9. Has the odor diminished noticeably? Also, how long has it been since everything was dry? I have found in tough cases (especially with cats) that a second or even a third treatment of the enzyme cleaner is necessary. It may seem like it’s not doing anything, but after hitting it with another round or two the odor is still detected but it starts to fade more quickly. It sounds odd, but waiting a month can make a big difference. As for sealing, it simply creates a barrier that the smell cannot penetrate. Imagine putting a dirty, smelly cat box inside a trash bag and tying it up tightly. Whatever “bad” scents that are within just get locked in. Sure, you could logically say it’s still there but you’re not going to smell it. You could also try the ozone generator. This works wonders on everything form urine odors to smoke that has penetrated carpets and walls. In this case, it helps neutralizer pee odors in the concrete.