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How Do You Remove Bloodstains From Concrete Floors?

Last updated October 31, 2026

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The short answer

Start with Cold Water

Blood proteins set with heat, so avoid warm or hot water at first. Cold water helps break the stain loose without cooking it into the porous concrete. Blot the area with clean paper towels to remove as much liquid as possible before you add anything else.

Mix a few drops of dish soap into a bucket of cold water. Dip a stiff nylon brush into the solution and scrub the stain in a circular motion. Rinse the area with cold water and blot dry. For fresh stains, this often lifts most of the discoloration.

Use Enzyme Cleaners

Enzyme cleaners break down the organic proteins in blood, making them a strong option for concrete. Apply the cleaner directly to the stain and let it sit for the time listed on the label. Then scrub with a brush and rinse with cold water.

If the stain persists, repeat the process. Enzyme cleaners work slowly, so patience matters. Avoid mixing them with bleach or other chemicals, as that can create harmful fumes. Always check the product label for surface safety on concrete.

  • Blot fresh blood with paper towels
  • Use cold water and mild dish soap
  • Scrub with a stiff nylon brush
  • Apply enzyme cleaner for protein stains
  • Rinse and repeat as needed
  • Test any cleaner in a hidden spot

Try Hydrogen Peroxide

For dried stains, hydrogen peroxide can help. Pour a small amount of 3% hydrogen peroxide directly onto the stain. Let it bubble for a few minutes, then scrub gently with a brush. Rinse thoroughly with cold water afterward.

Hydrogen peroxide can lighten concrete, so test it in an inconspicuous area first. Wear gloves to protect your skin. If the stain is large or deeply set, you may need to repeat the process several times before it fades.

Handle Porous Concrete

Concrete is porous, so blood can seep below the surface. This makes some stains stubborn. A paste of baking soda and cold water can help draw out the stain. Apply the paste thickly, let it dry, then scrub and rinse.

For very old or heavy stains, a poultice made for concrete might work. Follow the product instructions carefully. If the stain remains after several attempts, consider consulting a local water damage pro who has experience with concrete flooring cleanup.

Know When to Call Pros

Large blood stains, especially from accidents, can be hard to handle alone. If the stain covers a big area or the smell lingers, professional help may be warranted. Local water damage pros have industrial cleaners and equipment for deep cleaning concrete.

If you live in Cypress, keep your cleaning supplies accessible for quick action. For stains tied to water damage, such as flooding that brought in contaminated water, the pros can assess the situation. They typically evaluate the surface and recommend the right approach.

  • Large or deep stains may need pro help
  • Contaminated water requires careful handling
  • Pros use industrial-grade cleaners
  • They can assess concrete porosity
  • Act quickly to prevent permanent staining

Talk to someone now

Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.

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Frequently asked questions

Can bleach remove bloodstains from concrete?

Bleach can lighten some stains, but it may not break down the proteins in blood. It can also discolor concrete or cause fumes. Safer options include enzyme cleaners, hydrogen peroxide, or a baking soda paste. Always test any product in a hidden area first.

How long does it take to remove a bloodstain from concrete?

Fresh stains often lift with cold water and soap in a short session. Dried stains may take several attempts over a day or two. Enzyme cleaners can require longer sitting times. Patience and repeated scrubbing usually work, but some stains may never fully disappear.

Is blood on concrete a health risk?

Dried blood can carry pathogens, so wear gloves and avoid direct contact. If the blood came from an unknown source or a sick person, clean carefully and consider professional biohazard cleanup. See a doctor if you feel unwell after exposure. General safety measures are important.

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