Asked by: Fanida Kirchrath
home and garden home appliances

How do you clean heavily stained concrete?

Last Updated: 22nd April, 2020

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Mix 1/2 cup baking soda to one gallon of water for a gentle cleaning solution. Add 1/8 cup of liquid dish detergent. Spray on patio surface, let sit for 30 minutes, then scrub and rinse. For heavily stained or mildewed patios, you may need a pressure washer.

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Hereof, how do you clean stained concrete?

To remove, pour one-eighth of a cup of liquid dishwashing detergent into a spray bottle, then top off the bottle with warm water and shake well. Spray the concrete stains with the soap solution, let it sit for 10 minutes, and then scrub with a stiff nylon brush.

Also Know, what is the best chemical to clean concrete? Muriatic acid (a.k.a. hydrochloric acid) is probably the most common chemical for cleaning cement.

Also to know, how can I make my concrete white again?

Apply vinegar or bleach to the discolored areas. If you use vinegar, do not dilute it. Pour it onto the concrete and scrub it into the surface with a scrub brush. If the discoloration starts to fade, repeat until it disappears completely.

How do you clean blood off of concrete?

Pour a small amount of hydrogen peroxide 3% (regular peroxide from the store) directly onto the stain and leave for about fifteen minutes. The peroxide will break down the blood stain, enabling you to mop it up with a clean paper towel. Repeat with the peroxide until all traces of blood are removed.

Related Question Answers

Rosita Guldenhoven

Professional

Does white vinegar clean concrete?

Use equal parts white distilled vinegar and warm water, then add a pinch or two of salt. Let this solution soak into your concrete for about twenty minutes.

Rachyd Tsyrba

Professional

Can you use vinegar on stained concrete?

There are 3 choices for cleaning stained concrete floors with vinegar: Use undiluted vinegar for extra tough stains. This option is very strong, and it may affect the strength of the concrete over time. So this should be used sparingly and only for extremely dirty floors.

Naheed Errahali

Professional

Can you use bleach to clean concrete?

Bleach effectively removes many stains, deodorizes and kills mold and mildew when used properly. For tough stains or dirt, scrub the concrete with a scrub brush. Allow the bleach solution to sit for five minutes. Empty the bucket, rinse it out and fill it with clean, warm water.

Aguinaldo Bodiger

Explainer

Do you need to rinse bleach off concrete?

Bleach not mixed with a detergent serves as a disinfectant to sanitize concrete surfaces. Therefore, they recommend cleaning the concrete surface with a detergent, then rinsing and drying the area before applying the bleach solution, which should remain on the surface for 10 minutes before rinsing off.

Sigfredo Cotrina

Explainer

Can you use OxiClean to clean concrete?

The active ingredient in OxiClean is sodium percarbonate, a powder that, when mixed with water, releases hydrogen peroxide and soda ash. The powder mixes best into warm-to-hot water. Mop that onto the walkway and wait five to 30 minutes. During that time, you can scrub the concrete to make the cleaning more effective.

Barrie Siebelist

Explainer

What is best to clean stained concrete floors?

Cleaning products for everyday cleaning of concrete floors include ammonia, vinegar and liquid soap. A long-handled brush is best for working cleaning products into the floor. When cleaning stained concrete, always start with a mild soap and water. If this is not sufficient, then use soap and ammonia.

Collette Potla

Pundit

What causes black stains on concrete?

If water has a high iron or mineral content, or if the water is carrying leaves or dirt, it can leave behind iron or rust colored stains, or dark spots on the concrete. The most common way to remove discoloration caused by water is to use a heated pressure washer, or acid rinse.

Hovik Geertsen

Pundit

What is the most effective patio cleaner?

The best patio cleaners
  1. Ultima-Plus XP Green Mould & Algae Remover. Best patio cleaner you can buy: a little goes a long way with this amazing patio cleaner.
  2. Jarder Spray & Leave Cleaner.
  3. Wet & Forget - Moss Mould Lichen & Algae Remover.
  4. Patio Magic!
  5. Pro-Kleen 5 Litres.
  6. Algon Organic Path and Patio Cleaner Concentrate.

Sergii Zhalkovsky

Pundit

Why is new concrete so white?

Efflorescence is a chalky white salt residue that can occur with any product containing cement. As moisture migrates up to the surface of the concrete, it carries along with it calcium salts from within the concrete. When the salts reach the surface, they react with CO2 in the air and form insoluble calcium carbonate.

Plautila Lavi

Pundit

What does baking soda do to wet concrete?

Baking Soda: Creates voids and pinholes in the surface. It acts as an accelerator. Veining Compound: Absorbs water from the mix and creates a colored line in the concrete. Spritzing with water activates cement and makes the vein more solid.

Daymara Peatain

Teacher

Why is my concrete spotted?

HandyPerson: The black-speckled coloring in concrete is due to a chemical called calcium chloride that is added to concrete to help the concrete cure, in other words, harden. When pouring concrete in cold weather, as is done in the Midwest, calcium chloride is added to help speed up the curing process.

Devid Potua

Teacher

How do you refinish old concrete?

Pour the resurfacer onto the concrete in one-foot wide strips. Scrub the material into the concrete surface using a long handled squeegee. Evenly spread the resurfacer back and forth onto the slab. Apply a non-slip finish using a concrete broom after about 5 minutes.

Risa Chis

Teacher

How can I lighten my concrete color?

To lighten stamped concrete after using a color release powder or liquid, you must first strip the sealant with a chemical stripper designed for this purpose. Scrub the stripped concrete with a stiff-bristled brush to remove as much of the color as you can.

Tanisha Rosell

Reviewer

How do you make patio slabs look new?

Give a tired patio or paving slabs a makeover
  1. Make sure your patio or slabs are clean and dry. That means, removing moss, algae and grease.
  2. To remove moss and algae, sweep the patio with a stiff broom. If there's thick coverage, we suggest using a fungicide.
  3. To remove grease, use our Oil & Grease Remover.

Ike Schoener

Reviewer

What is the best chemical for pressure washing?

Sodium Hydroxide – Also known as caustic it readily dissolves grease, fats and is a degreaser for glass and steel. Ammonia – Common glass cleaner and stainless steel cleaner. Potassium Hydroxide – Used to make soft or liquid soap.

Sanae Chukhlomsky

Reviewer

What do you spray on concrete before pressure washing?

Pretreat stains by scrubbing them with a concrete detergent.
Try loading a concrete degreasing cleaner into a spray bottle to mist onto the stains. After letting the stains soak for at least 3 to 5 minutes, scrub them with a stiff-bristled brush or rag. You can wait to rinse off the cleaner until later.

Esteban Gausepohl

Reviewer

Does Simple Green Clean concrete?

Simple Green Oxy Solve Concrete and Driveway Cleaner can be used with pressure washing equipment or for manual cleaning of concrete surfaces including driveways, sidewalks, patios and walkways. It removes oil, grease, grime and most stains and discolorations while still being non-corrosive and non-degrading.

Yuniel Sanchez Alarcos

Supporter

What gets stains out of concrete?

Get those unsightly grease, oil, and transmission fluid stains off your concrete driveway or garage floor. Spray them with oven cleaner. Let it settle for 5-10 minutes, then scrub with a stiff brush and rinse it off with your garden hose at its highest pressure. Severe stains may require a second application.

Man Carteiro

Supporter

How do you remove black stains from concrete?

Ammonia Solution
  1. Sweep the concrete with a broom to remove any loose dust and dirt.
  2. Mix 1 cup of ammonia and 1/2 gallon of warm water in a bucket.
  3. Apply the mixture to the black stain and let it stand for 5 minutes.
  4. Wet an old towel or shop towel with warm water from a sink.