When removing blood from concrete, you have to act swiftly. The best approach is to start by gently scrubbing the stain with a stiff bristle brush. Dried blood can be dampened with cold water beforehand to make removal easier, as it prevents the stain from setting. Avoid scrubbing too hard, since this can embed the stain in deeper.
With the right pre-treatment and detergent, you can wash the area to get rid of any remaining stains. Doing this will help you restore your concrete surface to its original condition. Let's take a deeper look at how to remove blood from concrete.
Initial Steps for Blood on Concrete
Here's a more detailed breakdown of how to clean blood stains from concrete:
Act fast: As soon as a blood stain appears on the concrete, address it quickly. This involves ensuring you have the right equipment on hand to address the stain, such as gloves, a spray bottle, sodium peroxide powder (for tougher stains), and a stiff-bristled brush. Addressing a fresh blood stain immediately ensures you can get it out of the concrete without issue. Fresh stains are much easier to manage before they dry and set in the concrete.
Gentle scrubbing for fresh stains: Be sure to use a stiff-bristled brush if the blood stain is relatively fresh. This will loosen the blood from the surface and prepare it for more thorough cleaning. Having the right brush and gentle scrubbing is important here, as you want to avoid driving the stain in deeper.
Handling dried blood stains: If you're dealing with blood that's already dried on the concrete, start by dampening the area with cold water. The cold water will help soften the dried blood and make it easier to break down during the cleaning process.
 Scrub the dried stain with cold water: After the stain has been dampened, scrub it with a bristle brush in a circular motion. The combination of cold water and mechanical action will lift the dried blood stain. Be patient and thorough while addressing a dried blood stain.
Repeat as needed: Depending on the severity of the stain and how long it's been set, you may need to repeat the dampening and scrubbing process several times. Each round will lighten the stain.
Addressing tougher dried stains
Tougher dried blood stains require a slightly different approach. Here's how you can address them:
Create a detergent solution: Begin by preparing a cleaning solution. Mix a detergent that contains sodium peroxide or sodium peroxide itself with warm water. Mix it in equal portions. Put back any remaining sodium peroxide in its container to avoid accidental spills.
Apply the solution to the stain: Once your solution is ready, apply a thin layer of it to the stained section of the concrete. Ensure the entire stain is soaked with the mixture to allow the cleaning agents to penetrate it. Once you're done applying the solution, save unused portions.
Let the solution sit: After you've applied the solution, let it sit on the stain for some time. This will allow the mixture to loosen the dried blood's grip on the concrete. This could take anywhere between a few minutes to a few hours depending on the severity of the stain.
Scrub the stain: Take a brush and start scrubbing the treated area. Use a stiff-bristled brush and a bit of elbow grease to thoroughly clean the stain. Be sure to scrub in a circular motion.
Rinse and repeat if needed: Rinse the area with clean water to wash away the loosened blood particles and detergent residue. If the stain doesn't go away, consider applying the solution again and repeating the process.
Cleaning Solutions for Blood Stains on Concrete
It could happen that you don't have a dedicated detergent around when faced with a blood stain. So, here are some cleaning solutions that could help you out:
Hydrogen peroxide: A go-to cleaning solution for blood stains on concrete is hydrogen peroxide. This acts as a mild bleach to lighten stains without ruining the surface. Apply directly to the stain and let it fizz before scrubbing.
Baking soda paste: A paste made from baking soda and water is effective for both dried and fresh blood stains. Apply, let it sit, then scrub off.
Dish soap and water: For less severe stains, use a mixture of dish soap and water. This gentle solution can break down blood proteins without harming the concrete.
White vinegar: An all-natural option is white vinegar, which can dissolve blood stains thanks to its acidity.
The Importance of Removing Blood Stains from Concrete
Addressing blood stains isn't just for aesthetic purposes and hygiene reasons, it's also because blood is a biohazard. This means there's the potential risk of exposure to bloodborne pathogens which can transmit diseases. This is why the cleanup process should be approached with care.
Whether or not you require professional biohazard cleanup services mainly depends on the circumstances surrounding the stain. Small, manageable stains on household surfaces or fabrics such as clothing or bed sheets can be treated with household cleaning agents. This is on the condition that one also follows proper precautions like wearing gloves and using the right disinfectants.
With larger spills or situations involving unknown origins of the blood, the relevant authorities may have to be notified.
Do note that all the techniques mentioned are primarily for minor DIY jobs. If you're facing a more substantial blood cleanup, you might need to enlist the services of a biohazard decontamination expert. Why? Because blood is typically classified under biohazard level 2 which means it can pose a significant threat to the environment and the general public.
Professional cleaning services have the necessary tools, protective gear, and expertise to safely and effectively remove blood stains. This minimizes health risks and ensures the area is thoroughly decontaminated.