Spray paint can be a handy tool for DIY projects, but it can also become a problem if you get it in the wrong places. It’s easy to miss the target with spray paints, and it can ruin the look of your home.
Unfortunately, it can also be difficult to get it off, and hiring a professional can be costly. In this guide, we'll explain how to easily remove spray paint from concrete walls yourself.
1. Scrub With Soap and Water
This is a good spray paint removal process because you won’t need to go out and buy any specialist cleaning spray paint equipment.
It takes quite a lot of manual effort to scrub, though, so we’d recommend moving on to one of the other techniques if you have a lot of latex paint or other spray paint off concrete walls to remove. Use a paint scraper to clean away as much of the dried paint or paint dries as possible.
What you’ll need:
What To Do:
- 1Sweep The Concrete
Clean all the visible dirt from on top of the concrete before you start work. - 2Fill The Buckets
Fill one bucket with warm water and the other with warm water and dish soap. If our soapy water (water mixed with dish soap) method does not remove the latex paint stains and paint residue, you can use a spray graffiti remover instead of soapy water to complete the work. - 3Soak The Affected Area
Cover the painted surface with the warm water. - 4Scrub The Paint
Dip your scrub brush in the soapy water and use it on the affected area in circular movements. Keep going until you start to see the removing paint lifting off. - 5Rinse And Dry
Use paper towels to absorb some of the loose paint, and then rinse with warm water. - 6Repeat The Scrubbing
Repeat the scrubbing and rinsing until you remove the all the paint. This may take a few hours and a bit of effort on your part to scrub it down. Scrubbing with soap and water can be effective, but it’s the mildest method to remove spray paint off concrete. It will only really work to clean spray paint stains or oil based paint stains that are fresh, and you may find that it doesn’t fully remove oil stains. Still, it’s a good place to start and could save you from having to spend any money at all.
2. Use a Power Washer or Pressure Washer
Power washers, sometimes known as pressure washers, shoot a single, powerful stream of water.
Power washer is a concentrated stream of water and is not only a great way of cleaning any porous surface with power wash or power washing. But power washer and pressure washer can also help you strip unwanted spray paint from concrete. Just be sure to handle power washer with care because they can be difficult to use.
What you’ll need:
What To Do:
- 1Put On Safety Gear
Make sure your eyes and hands are covered and change into some old clothes you don’t mind getting wet. - 2Lay Down Covers
Lay down the ground covers around the painted area to protect them from the spray. - 3Set Up The Washer
Set up the power washer using the instructions and apply the spray nozzle. - 4Clean The Paint
Stand about 10 feet away and spray the power washer over the painted concrete. Keep going back and forth until the excess paint has lifted off.
Power washers are great to remove spray paint from concrete, but power washer is not cheap. If you don’t own one already, then you'll need to go out and buy one, and you'll also need to spend a bit of time getting used to using it.
If money is not an object and you've got a large area to clean, then this is probably the best method.
3. Use Paint Thinner or Paint Stripper
Paint thinner is designed specifically to remove paint from a surface. Paint thinners and paint stripper are solvents that are made to dissolve substances, in this case, paint. You can't use paint stripper and thinners on every surface, but concrete is tough enough that it won't become damaged.
There are a wide variety of paint thinners and paint stripper available in hardware stores and online, so it's worth looking for one which is specifically designed to remove spray paint from concrete
What you’ll need:
What To Do:
- 1Clean The Concrete
Sweep up any dirt on top of the indoor concrete before starting work because this can interfere with the solvent. - 2Apply Paint Thinner/Stripper
Make sure you have your protective clothing on and you're in a well-ventilated area. Follow the product instructions and apply the lacquer thinner /stripper to the or affected area. Don't forget to wear safety goggles and protective clothing. - 3Wipe Clean
Use the cloth to wipe the paint thinner/stripper off. - 4Repeat As Needed
Continue to apply and wipe until the paint is gone.
Paint thinner is cheap and accessible and works well to remove spray paint from concrete. The only downside is that it can be toxic and flammable, and the vapors can travel into your home. Make sure you do the work in a well-ventilated place and keep all heat sources away from the solvent.
4. Use Graffiti Remover
Graffiti remover was first designed to deal with removing unwanted oil based spray paint from concrete buildings, so it’s no surprise it’s perfect for the effective paint remover job. It’s made to loosened paint grip on the large concrete surface so it can be wiped away easily. This paint remover comes in all forms, but we'd recommend going for an aerosol or liquid solution.
What you’ll need:
What To Do:
- 1Clean The Concrete
Remove any dirt from the top of the concrete surface so that the graffiti remover can penetrate the paint. - 2Apply Graffiti Remover
Follow the specific instructions of your product and apply it to the surface of the removing paint. You’ll usually need to sit and wait for about 20 minutes so it can work. - 3Scrub
Use your scrub brush or wire brush or stiff bristled brush in a circular motions on the concrete. The removing paint in circular motions should start to lift off now. - 4Use The Cloth
Wipe down with a cloth to remove some of the paint from the surface. - 5Rinse
Take the warm water and rinse the surface; most of the paint should come loose. - 6Repeat
Repeat the process as many times as needed to thoroughly remove spray paint.
Graffiti remover is fairly inexpensive, and you can pick it up easily enough. It works well but can take a while because you have to leave it to work.
5. Use A Sandblaster
Sandblasters are tough pieces of equipment, and it's important you get a bit of training before you use one. They work by firing fine sand onto a surface and eroding the top layer.
They're designed to literally strip away layers of concrete, so they'll make light work of paint, but you need to make sure you don't do any lasting damage to the concrete surface while you’re working.
What you’ll need:
What To Do:
- 1Suit Up
Wear protective gear and make sure that your eyes and face are covered with protective gear. - 2Use The Sandblaster
Stand about 3 feet away and direct the sandblaster to the painted area. Move the nozzle back and forth over the area, and you should see layers of concrete become dust. Keep going until the paint is no longer visible. - 3Clean The Dust
Use your vacuum to clean the concrete dust particles from the concrete surface and use a garden hose to clean it up if you're outside. Connect your garden hose to the water inlet on the washer. Wash the concrete with warm water from a garden hose. Your concrete surface should now be completely paint-free.
Sandblasting is helpful for large areas of stubborn paint that’s been there for a while, and it should work very quickly. This is definitely only a method for those with a lot of DIY experience and is not suitable for beginners.
6. Use TSP
Trisodium phosphate (TSP) is a powerful solvent that will work to strip the paint right from the concrete. The trisodium phosphate is easy to pick up online or from local hardware stores but make sure you follow the instructions and dilute trisodium phosphate. This is an effective method that you can use to strip paint from a large area quickly.
What you’ll need:
What To Do:
- 1Clean The Concrete
Brush and clean the concrete surface to remove any dirt and debris which will impact the TSP from working. - 2Apply TSP
Put on all your protective gear and dilute the TSP. Dip your scrub brush into the solution and scrub the concrete surfaces in concentric circles. For very tough water based spray paint, you should leave it to work for 30 minutes and then scrub again. - 3Rinse
Take the warm water and rinse the painted concrete surfaces. Hopefully, the spray paint is starting to lift. - 4Repeat As Needed
Repeat the process until the spray paint is totally gone.
TSP is very effective, but the solvent is toxic, so you should only use it in a well-ventilated area. Make sure you check your local codes because it has a severe environmental impact and has been banned in some areas.
Use a stiff bristled brush to scrub the paint and concrete just as you use it for cleaning process of the concrete floor and removing spots from it. After some time, paint bubbles and other particles are removed from the surface with the help of vinegar solution due to a reaction. Wash the concrete surface with the help of warm water and remove water from the porous surfaces with the help of a wiper
7. Use An Angle Grinder
Angle grinders are advanced pieces of DIY equipment that work a bit like a sander. You can attach different wheels to the device and use it on a range of surfaces to file them down. It works well on concrete surfaces and can remove the top layer of spray paint.
If you’ve never used an angle grinder before, then you should proceed with caution. One wrong move and you could damage the concrete, and you’ll need to be a bit of background training before you try to use angle grinder.
What you’ll need:
What To Do:
- 1Clean The Concrete
Brush and clean the top layer of the concrete to remove any dirt which might impact the grinder. - 2Use The Angle Grinder
Turn on the grinder and lightly press it onto the spray-painted area. Move it in circular motion around the area, and don't linger too long in one section, or you'll remove too much concrete. - 3Vacuum
Use the vacuum to remove any dust gathered on the porous surfaces and clean with warm water if needed.
Why It is Hard to Get Spray Paint Off Concrete?
Spray paint is useful because it goes on in layers very quickly, but this also makes it difficult to get spray paint from concrete. It’s particularly challenging to remove from concrete because the material is porous and absorbs the spray paint very deeply.
That’s why soap and water won't always be effective, and it's why people often turn to pressure washers or solvents to remove spray paint from concrete sidewalks.
Epoxy-based spray paint is one of the toughest varieties, and it’s often used on concrete. It’s one of the hardest to remove because it’s waterproof and durable, and it’s not designed to come off easily.
This has become challenging to remove spray paint, and you'll need to use a specialist paint stripper or a powerful sandblaster.
Protecting Concrete While Removing Spray Paint
It's important that you don't damage the concrete while you removing spray paint, or you could leave your home looking terrible or even cause structural damage while removing spray paint. Here are some tips for protecting it while you work on removing spray paint:
Cover Up The Concrete
While you will need access to the painted area, you don't need to expose all the concrete to the power washer or solvent. Instead, use plastic sheets to cover the unpainted areas to stop unnecessary damage.
Always Rinse Off Solvent
If you’re using a paint stripper, TSP, or other solvents, then it's important you don't leave it on for too long, or it can cause lasting damage to the concrete. Always rinse it off after a few minutes with warm water to prevent this from happening.
Start With Gentle Methods
Always start with gentle methods first to see if they’ll work. Soap and water can remove some spray paint, and if it does work, then you won’t need to use any harsh solvents or power sanders that can damage the concrete.
Will bleach remove spray paint from concrete? Bleach may remove the paint from your concrete, but you should not use it. It can potentially leave an incurable paint stain on the surface due to its salt deposits. Concrete can absorb all these salts causing paint stain.
Will acetone remove spray paint from concrete? Acetone should be part of your list of options to help remove spray paint stains on your concrete. With proper application, it can completely solve your problem of paint stains. However, this may not be the best option if you plan to clean a huge surface.
Home remedies like the use of vinegar are always safe. However, you still need to ensure that you wear your protection to prevent allergies from the paint fumes and harsh chemicals.
Getting Spray Paint Off Concrete FAQs
Does vinegar remove paint from concrete?
Yes, the acidic nature of vinegar can remove paint from concrete, but it won’t be as effective as other specialist solvents and paint removers.
Will acetone remove paint from concrete?
Yes, acetone is a very potent solvent and it will be able to remove paint from concrete.
What's the best paint stripper for concrete?
There are many effective paint strippers on the market, but we’ve found that the Confined Space 3202 Paint Strip Gel works particularly well on spray-painted concrete.
What should you do if graffiti is common on your sidewalk?
The faster you can remove graffiti from brick, the less likely it is that others will add to it and make it harder to clean. Look to remove it quickly using one of the methods above and report it to the local authorities.
Conclusion
It can be a real challenge to remove spray paint from concrete without damaging the surface, but it can be done. Always remember that safety comes first, and you should handle paint strippers and other solvents carefully.
Hopefully, this guide has introduced you to a variety of effective methods that you feel comfortable trying, and you now know how to remove spray paint from concrete.