Quick Hacks to Get Rid of Urine Smell from Concrete

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Picture this: you’ve just returned home after a long day, ready to kick back and relax. But as soon as you open your garage or basement door, you smell the overpowering stench of pet urine.

Even the most well-trained pets can have accidents. Concrete floors seem to have a knack for trapping those lingering odors.

Trust me, I’ve been there.

During a recent hurricane, the only place my dog had to go was on our empty garage floor. No matter how many puppy pads we set up, her aim wasn’t exactly perfect.

You want to get the urine smell out of concrete floors quickly, before they’ve had a chance to soak in.

In this article, I’ll be sharing the secrets I’ve uncovered for effectively getting rid of urine stains and smells from concrete floors.

We’ll explore why concrete holds onto these unwelcome odors, learn the best methods for removing stains, and learn how to protect your concrete floors for easier cleanup in the future. We’ll also cover what the best concrete garage floor coating is to further protect your floor.

So, let’s roll up our sleeves and dive in!

How to Find Urine Stains on Concrete

Identifying urine stains on concrete can be tricky. After time, it often blends in with the surface’s natural color variations and texture. 

These stains are often not easily visible to the naked eye. However, locating them is crucial to cleaning the stain and removing the urine smell. 

A black-light is one of the most effective ways to find hidden urine stains on concrete. 

A black-light emits ultraviolet (UV) light, which causes urine stains to fluoresce or “light up,” making them stand out against the surrounding concrete. This method allows you to spot even the most hard-to-find stains.

Here’s how to use a black light safely and effectively to find urine stains on concrete:

  1. Choose the right black light: A handheld UV flashlight or a tube-style black light works best for this purpose. You can easily find them at hardware stores or online.
  2. Prepare the area: Turn off all the lights and close any blinds or curtains to create a dark environment. This will make it easier to see the fluorescing stains.
  3. Scan the concrete: Turn on the black light and slowly scan your concrete floor’s surface, holding the light about 12 to 24 inches from the ground. Urine stains will glow under the UV light, appearing as bright yellow or greenish spots.
  4. Mark the stains: Use chalk or a non-permanent marker to outline the urine stains so you know where to focus cleaning.
  5. Safety precautions: Avoid looking directly into the UV light, which can harm your eyes. Also, keep the black light away from children and pets.

Here’s a few images that show how urine stains look under a black light: Urine Stains Under Black Light

Using a black light, you can pinpoint the exact locations of urine stains on concrete, ensuring a thorough cleaning process and a fresh, odor-free surface.

Urine stain on concretePin

Why Concrete is Hard to Clean

Cleaning up urine smells and stains from concrete can be tricky, and the reason is because of the very nature of concrete itself. 

Unlike smooth surfaces like tiles or linoleum, concrete is a porous material. 

Think of concrete like a sponge with countless tiny holes and crevices that easily absorb liquids, including urine. Once these fluids seep into the concrete, they’re not easy to remove.

Because it’s so porous, concrete holds onto urine stains and smells much more stubbornly than other surfaces. 

Imagine cleaning stains off a smooth tile versus a sponge. The tile would be a breeze, but the sponge requires a lot more effort. 

That’s what makes cleaning concrete an entirely different ball game. 

It’s crucial to tackle the issue promptly and effectively, using the right techniques and products, to keep your garage or driveway clean and odor-free.

Why Common Cleaners Don’t Remove Pet Urine From Concrete

When your dog or cat pees on your floor, you may immediately grab for an ordinary cleaner like bleach, vinegar, baking soda, hydrogen peroxide, ammonia, or rubbing alcohol. 

However, these common household cleaners may not be that good at tackling urine odors and stains on concrete surfaces. Here’s why:

  • Bleach: While bleach is a powerful disinfectant and stain remover, it’s ineffective for removing pet urine odor from concrete. Additionally, bleach can be harmful if inhaled or comes into contact with skin, making it a less-than-ideal choice for cleaning urine stains.
  • Ammonia: Using ammonia to clean pet urine stains can actually make the odor of pee smell worse. The smell of ammonia resembles the odor of urine, which may attract pets to return to the spot and create new stains. Plus, ammonia can harm humans and pets if inhaled or ingested.
  • Soap and Water: While soap and water can help wash away some physical evidence of urine stains, they do nothing to help remove the lingering odor from concrete. Since concrete is porous, soap and water will only clean the surface, leaving the absorbed urine deep within the material.
  • Vinegar and Baking Soda: Using vinegar and baking soda is a good first step in cleaning concrete. They can help neutralize pet odors and lift surface stains. However, they work best when followed up with an enzymatic pet urine cleaner. Using vinegar and baking soda alone may not entirely eliminate urine odors and stains, especially those that have penetrated deep into the concrete.
  • Trisodium Phosphate (TSP): TSP can clean effectively, but it’s harsh and not environmentally friendly. If not used carefully, it can damage concrete surfaces and harm plants and animals. Due to its potential hazards, TSP should only be used as a last resort.
  • Hydrogen Peroxide: While it is safe to use and can help remove some surface stains, it’s ineffective in removing tough pet urine stains and odors that have seeped into concrete.
  • Enzymatic Cleaner for Concrete: An enzymatic cleaner is the best solution for effectively and safely removing pet urine odor and stains from concrete. These cleaners are formulated to work incredibly well on porous materials like concrete, as they contain enzymes that break down the organic compounds responsible for the odor and stains.

It’s important to know the potential risks and drawbacks of using these standard cleaning methods on concrete surfaces. 

For instance, harsh chemicals like bleach or trisodium phosphate (TSP) can damage concrete surfaces, causing discoloration, pitting, or even structural issues if misused. Some cleaning agents, such as ammonia or bleach, can harm pets if inhaled, ingested, or absorbed through their skin. 

Additionally, using ammonia to clean pet urine stains can make the odor worse. It actually attract pets to return to the spot, creating new stains.

Common cleaners may leave behind residues that are difficult to remove, leading to unsightly and unhygienic surfaces. These residues can also interfere with other cleaners.

Given these risks and drawbacks, treating these common cleaning methods as temporary or partial solutions is crucial. They may provide some relief but often don’t address the root cause of urine smells and stains on concrete surfaces. 

For best results, consider using a specialized enzymatic cleaner designed for concrete. It targets the source of the problem and offers a more effective, long-lasting solution.

How to Get The Urine Smell Out of Concrete

To effectively remove pet urine from concrete floors, you must follow a three-step process: soaking, scrubbing, and deodorizing. 

In this section, we’ll break down each step, provide a list of materials needed, instructions, precautions, and images to make the content easy to follow and scan.

Step 1: Soaking

Soaking is an essential step in cleaning, as it helps loosen urine crystals and makes them easier to remove. For this step, you’ll need:

  • A mixture of water and vinegar or baking soda
  • A spray bottle or watering can
  • A brush or broom

Why soaking is important: Soaking the stained area with a solution helps to dissolve and loosen the urine crystals, making it easier to scrub them away during the next step.

Soaking solution: A natural and effective soaking solution can be made by mixing equal parts water and vinegar or by combining hot water with a few tablespoons of baking soda. Either solution will work well for this step.

How to apply the solution: Pour the solution into a spray bottle or watering can and generously apply it to the stained area, making sure it’s thoroughly soaked. If you’re using baking soda, ensure it’s dissolved completely in the water before applying it.

Soaking duration: Allow the solution to sit on the concrete for at least 30 minutes to an hour, giving it enough time to penetrate the surface and loosen the urine crystals.

For a visual guide on how to perform this step, check out this tutorial video. This will help you better understand the soaking process and ensure you’re doing it correctly.

Step 2: Scrubbing

Scrubbing is necessary to remove urine stains and any urine residue after soaking the concrete. This step ensures that the loosened urine crystals are thoroughly removed from the porous surface.

Tools for scrubbing: The best tools for scrubbing concrete are a stiff-bristled brush or a power washer. Both options effectively remove stains, but a power washer can thoroughly clean heavily stained areas.

Instructions for using a brush: Use a stiff-bristled brush to scrub the soaked area vigorously, paying particular attention to any visible stains. Apply even pressure to the affected area to avoid damaging the concrete surface.

Instructions for using a pressure\power washer: If you opt for a pressure or power washer, be sure to use a low-pressure setting to prevent damage to the concrete. Follow the manufacturer’s instructions for safe and effective use.

Rinsing the concrete: After scrubbing, thoroughly rinse the area with clean water to remove any loosened residue. Look for any remaining stains or discolored areas. Repeat the soaking and scrubbing process until the stains are gone.

Step 3: Deodorizing

Deodorizing is essential to eliminate the dog or cat urine smell from the concrete and prevent it from coming back. Two effective options for deodorizing are positive ionization and enzymes or commercial products.

Positive ionization: This method uses a device that emits positive ions to neutralize urine odors from concrete. These ions attach to the odor-causing molecules and render them odorless. Follow the device manufacturer’s instructions for proper use and application.

Enzymes or commercial products: An enzyme cleaner or commercial deodorizing product breaks down urine odor molecules by using enzymes or other active ingredients. These products are designed to target and remove the urine smell from porous surfaces like concrete.

Instructions for applying deodorizers: Apply the chosen deodorizing product according to the manufacturer’s directions. Some products may require dilution or specific application techniques. If needed, repeat the deodorizing process as recommended by the product instructions.

Testing for odor: After deodorizing, allow the concrete to dry completely before testing for any remaining odor. If the smell persists, repeat the deodorizing process or try a different product.

By following these steps, you’ll be well on your way to removing urine smells and stains from concrete surfaces, leaving them clean and odor-free.

How to Prevent Pets from Peeing on Concrete Again

Even after thoroughly cleaning and deodorizing your concrete surface, pets may still be tempted to pee on it again. 

This is because animals, especially dogs, rely on their sense of smell to mark their territory. They may return to spots where they’ve previously left their scent.

To prevent future dog urine stains and smells, consider the following tips for protecting your concrete surfaces and deterring pets from relieving themselves.

Use Sealants, Mats, or Barriers

  • Sealants: A concrete sealer can help create a protective barrier that prevents urine from being absorbed by the porous surface. This makes cleaning easier and minimizes the chance of lingering odors that can attract pets.
  • Mats or Rugs: Placing an outdoor mat or rug over the concrete surface. This provides a physical barrier that discourages pets from peeing on the area. Additionally, these materials are easier to clean and can be replaced if needed.
  • Barriers: Installing temporary or permanent barriers, such as fences or planters, can restrict access to the concrete area and prevent pets from peeing on it.

Deter Pets with Repellents, Training, or Rewards

  • Repellents: Pet-safe repellents, such as sprays or granules, can help deter pets from peeing on concrete. These products typically contain scents that pets find unpleasant, discouraging them from marking the treated area.
  • Training: Teach your pets where they should and shouldn’t pee by consistently reinforcing desired behaviors. Reward your pets when they relieve themselves in designated areas and promptly correct them if they try to pee on the concrete.
  • Rewards: Encourage your pets to use designated areas by providing incentives, such as treats or toys. This positive reinforcement will help them associate peeing in the proper spot with positive experiences.

By implementing these preventive measures and consistently reinforcing appropriate behaviors, you can minimize the chances of your pets peeing on your concrete surfaces and keep them clean and odor-free.


Why does pet urine smell so bad on concrete surfaces?

Pet urine smells particularly bad on concrete surfaces because it’s so porous. When urine seeps into the concrete, it penetrates the surface. It becomes trapped, allowing the odor-causing bacteria to grow and multiply.

The chemical composition of urine, including ammonia, uric acid, and other waste products, can cause persistent odors and stains on concrete surfaces. When urine dries, it leaves behind uric acid crystals emitting strong smells that can be difficult to remove.

Over time, the smell of dog & cat urine becomes stronger as the bacteria continue to thrive within the concrete’s pores.

What is most effective at removing pet urine stains and odors from concrete?

Some of the most effective products for removing pet urine stains and odors from concrete include:

  • Enzymatic cleaners: These cleaners contain enzymes that break down the odor-causing bacteria in pet urine, neutralizing the smell and helping to remove stains.
  • Trisodium phosphate (TSP): A heavy-duty cleaning agent, TSP can help break down and lift urine stains from concrete surfaces.
  • Hydrogen peroxide: This common household product can help remove stains and neutralize odors by breaking down the compounds responsible for the smell.

How long does it take for urine odors & stains to be completely gone?

The time it takes to remove pet urine from concrete depends on several factors. This includes the severity of the stain, the age of the stain, the type of cleaner used, and the effectiveness of the cleaning method. Sometimes, stains and odors can be removed in a few hours. In others, it may take several days or even weeks of repeated treatments to completely eliminate the problem.

How do I prevent pet urine from seeping into concrete?

Applying a concrete sealer is one of the most effective ways to prevent pet urine from seeping into concrete and causing stains and odors. These sealers create a protective barrier on the surface of the concrete, preventing liquids from penetrating and causing damage. It’s important to choose a sealer specifically designed for use on concrete and to follow the manufacturer’s instructions for proper application.

Can I use bleach or ammonia to clean pet urine stains on concrete?

Using bleach or ammonia to clean pet urine stains on concrete is not recommended. Both chemicals can react with the compounds found in pet urine, creating harmful gases and potentially worsening the odor. Additionally, bleach can damage the concrete surface. Instead, opt for enzymatic cleaners, trisodium phosphate, or hydrogen peroxide, which are safer and more effective options.

Are there any eco-friendly options for cleaning pet urine stains?

Yes, there are eco-friendly options for cleaning pet urine stains and odors from concrete. Many enzymatic cleaners on the market are biodegradable and non-toxic, making them a more environmentally friendly choice. You can also use natural products like vinegar, baking soda, and hydrogen peroxide, which are effective at neutralizing odors and removing dog urine stains without harming the environment.

Can pet urine damage the concrete over time?

While occasional pet urine accidents are unlikely to cause significant damage to concrete, long-term exposure to urine can cause the surface to deteriorate over time. The acids in pet urine can slowly break down the concrete, making it more susceptible to cracking, chipping, and discoloration. Regular cleaning and maintenance, along with sealing the concrete, can help minimize the risk of damage.

Wrapping It Up

Removing urine smells and stains from concrete is essential for maintaining a clean and pleasant indoor and outdoor environment. 

You can effectively eliminate urine odors and stains if you follow the steps outlined in this article. This included soaking, scrubbing, and deodorizing.

Preventing pets from peeing on concrete again is also an important step. Using concrete sealants, mats, barriers, and pet training methods can help deter your dog or cat from marking your concrete floor. Finally, use one of these garage air fresheners to eliminate any lingering odors.

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Tim Wells

Tim Wells, the founder of Garage Transformed, has been featured in dozens of home renovation publications, including BobVila.com, Home Stratosphere, House Digest, Livingetc, and SFGate. Since 2018, he has helped over two million people transform their everyday garages into something they can be proud of. He lives in Central Florida with his wife and bulldog.

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