will muriatic acid remove paint from concrete

Will Muriatic Acid Remove Paint From Concrete?

Will muriatic acid remove paint from concrete or not? Ask any painting professional this question and then wait for their distasteful responses.

I bet most of them will say YES but encourage you to look for a safer alternative like using vinegar or any of the techniques that allow you to strip paint without chemicals – specifically if you have little or no experience with paint removal.

Because let’s face it: Muriatic acid is freaking high in concentration. Therefore you don’t want to play around with this strong stuff!

But if you know when and how to use it the proper way, you will be tempted to use it every single time. And that’s what I’m about to teach you.

Will muriatic acid remove paint from concrete?

Yes, it does! Due to the coarse texture that absorbs paint millimeter’s deep, stripping old paint from concrete requires you to break a sweat. But it’s not impossible.

And since we’re breaking the big tool: muriatic acid to solve this problem, you’ll be surprised at how easy going the process will be. So do not panic!

Muriatic acid works miraculously well at removing stains and paint from concrete because it neutralizes alkalinity. However, it’s extremely hazardous and can etch your precious surface if left on for too long or used excessively.

On top of that, muriatic acid is damaging to clothes. Even prolonged inhalation of the fumes can lead to heart attack or death, so utmost care is needed.

Without wasting much of your time, below are the necessary tools for the job.

Things You’ll Need

  • Muriatic acid
  • Water
  • Plastic bucket
  • Hard-bristled brush or broom
  • Personal Protective Equipment (PPE)

How to remove paint from concrete with muriatic

will muriatic acid remove paint from concrete

When stripping paint, there are two conditions involved:

You’re either removing wet splatters from the concrete or giving the surface a facelift, thereby stripping old paint.

If it’s just a wet paint splatter, there isn’t much to do. Just cover the surface with water then use a hard-bristled brush and detergent to scrub it away. Yes! It’s as easy as it sounds.

On the other hand, if you’re rejuvenating the concrete, there is a long way to go. Let’s get the ball rolling.

Step 1: Prepare the work area

First and foremost, you want to protect the areas you are won’t be stripping such as nearby plants or other precious surfaces with a plastic sheet.

Secondly, tape them down firmly with painter’s tape because muriatic acid can damage them.

You can also go as far as sweeping the concrete surface removing dirt and debris.

Step 2: Kit Up for the Job

Since you are working with a TOXIC solution, you need to protect yourself as best as you can. Wear proper PPE like a respirator, safety goggles, gloves, and protective clothing.

Furthermore, you should be working in a well-ventilated area as well.

All these for just applying Muriatic Acid? You may ask.

Yes, my dear! Prevention is better than cure.

Step 3: Prepare the solution

Mix one-part muriatic acid to 10 parts water in a glass or acid-resistant plastic container. When doing this, please slowly and carefully pour the acid into the water.

WARNING!!! Never add water to the acid, as you’ll provoke an exothermic reaction –propelling the acid out of the container.

Step 4: Apply the mixture

Pour the solution directly onto the painted or stained concrete surface.

Step 5: Brush the stained surface

Wait a little time before scrubbing the surface with a hard-bristled brush to remove the paint.

Step 4: Clean the surface area

At this juncture, you want to hose the concrete, thoroughly rinsing with clean water to remove any acid residue.

Tah-Dah! You have a clean surface.

What is the best way to remove paint from concrete?

A deeper look at how to remove paint from concrete

  • Give the concrete surface a deep cleaning and allow it to dry.
  • Apply a paint stripper.
  • Give the paint stripper some time to set.
  • Scrub the surface.
  • Follow up the scrubbing with a power wash.
  • Repeat the process as necessary until all the paint is removed.

What is the best way to remove paint from concrete

Will muriatic acid take paint off?

Muriatic acid is a chemical primarily used in swimming pool treatment. It can also be used for removing paints and other substances from surfaces like bricks, concrete and stone that can’t be cleaned easily.

Can you clean concrete with muriatic acid?

The acid works well on concrete and on many masonry projects because it neutralizes alkalinity. The surface becomes “etched” and clean, which allows for the proper adhesion of a new coating. Despite its effectiveness, muriatic acid should be used on concrete stains only if you’ve tried gentler alternatives to no avail.

How do you remove old paint from a concrete porch?

Project Summary

  • Clean the concrete surface thoroughly and let dry.
  • Scrape peeled or chipped paint.
  • Apply paint stripper and wait.
  • Remove paint stripper residue.
  • Reapply paint stripper as necessary.

Does WD 40 remove concrete paint?

WD40 is a light penetrating oil that can be effective in loosening latex spray paint from concrete surfaces.

Will CLR remove paint from concrete?

The acidic cleaner can discolor or alter the texture of a concrete surface. It’s inadvisable to use a CLR solution on painted, sealed, and coated concrete surfaces or on concrete that’s less than a year old.

What type of acid removes paint?

Acid and Cement, For surfaces like brick and cement,

hydrochloric acid is a common ingredient used to remove old paint. Commonly sold as muriatic acid, this is a strong compound that works well on hard surfaces. It’s recommended that you dilute the muriatic acid in a proportion of four-parts water to one-part acid.

Does vinegar remove paint from concrete?

Safely Remove Paint from Concrete Floor with Vinegar

Vinegar is an inexpensive everyday cleaning product that doubles as a natural paint remover and a way to take care of an oil stain on driveway surfaces. Use vinegar to get paint off concrete without resorting to a toxic chemical paint stripper.

How long should muriatic acid sit on concrete?

Brush or spray the acid solution on the concrete, wait eight to 10 minutes, then neutralize the acid by spraying the surface with a mixture of one cup of ammonia in one gallon of water. Kill Mold—Use muriatic acid to kill stubborn mold and mildew on hard surfaces, such as brick, tile, concrete, and stone.

What is the harmful effect of muriatic acid?

Health Effects

Skin contact causes severe burns; repeated or prolonged exposure to skin will cause dermatitis. Muriatic acid is harmful if swallowed and may cause irreversible damage to mucous membranes; repeated or prolonged exposure to corrosive materials or fumes may cause gastrointestinal disturbances.

What is the best chemical to clean concrete?

The Best Concrete Cleaners of 2021

  • RMR-86 Instant Stain Remover Spray.
  • Sheiner’s All Purpose Floor Cleaner.
  • Zep Concrete Pressure Wash Cleaner Concentrate.
  • Zep Heavy-Duty Powdered Concrete Cleaner.
  • Oil Eater Cleaner Degreaser.
  • Terminator-HSD Concrete Cleaner.
  • ACT Eco Friendly Concrete Cleaner.


Will muriatic acid remove paint from concrete? Yes, muriatic acid can remove paint from concrete surfaces. But while muriatic acid will readily remove paint from concrete, remember multiple coats can be a hard-ass to strip.

So you can either repeat the entire process as need be or effectively use a floor scrubber and screen-mesh sandpaper to sand the surface – removing paint, as well as smoothing the concrete. 

Lastly, when you’re done make sure you contact your local recycling center for instructions on how to safely dispose of the muriatic acid in your area.

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