To combat mold and algae stains on concrete, consider Mold Armor E-Z House Wash concrete cleaner. This water-based cleaner uses Microban foaming technology to lift dirt and mold from concrete surfaces, and provides long-term stain resistance. It works on most stains in minutes with no scrubbing required.
Vinegar is a natural and safe alternative to cleaning concrete with harsh chemicals. In the case of algae and mold, it does a better job than bleach, and it is better in the long term for killing these infestations.
Neutral pH neutral cleaners are ideal for cleaning sealed concrete surfaces free from embedded dirt and deep stains. They can also be used on unsealed indoor or outdoor concrete surfaces that only require a mild cleaning. Alkaline concrete cleaners have powerful degreasing capabilities.
Mix four cups of vinegar with a quarter cup of salt and some water and spray your tarmac driveway, leave the vinegar solution for 15-20 minutes before washing away with water. Continue spraying your tarmac for up to a week. Once complete, wash your driveway thoroughly using dish soap and warm water, or tarmac cleaner.
Wet & Forget Outdoor will tackle all of these ugly stains on your concrete, with no elbow grease required. Here are the steps to get rid of these growths once and for all: Mix 1 part Wet & Forget with 5 parts water in a pump-up garden sprayer. Spray the affected concrete with the diluted Wet & Forget solution.
Chlorine is still one of the most effective killers of algae so doing a super-chlorination of 10-20 ppm of chlorine can go a long way towards wiping out the algae. Liquid chlorine is an ideal shock for algae because it is fast acting and does not add cyanuric acid (CYA) or calcium to the water.
Cleaning concrete with muriatic acid can be a highly effective solution if used correctly, providing ultra-bright white concrete and removal of many types of stains. In one application, you can remove rust stains, oil stains, algae, and paint splatter with a quick chemical application followed by pressure washing.
Use Bleach
But that's not all; chlorine bleach can also be used for cleaning the concrete driveway. Of course, you should dilute it with equal parts of water or a 1:1 ratio. With the mixture ready, spray it on the driveway, allowing it to sit for 10 minutes. Then, use a stiff brush before rinsing with clean water.
As a gentler cleaner, bleach can't harm concrete's durable material. Aside from being an effective cleaner and stain remover, it also acts as a disinfectant to the concrete surface.
In the same way that baking soda can be a spot treatment for black algae, household borax does the same for blue and green algae. Simply use the borax to scrub away algae that's sticking to your pool walls, then use the brush to dislodge it. Follow up by vacuuming up or scooping out the free-floating algae.
Green mold on concrete can be removed with bleach, water, and dish soap.
Mix 1-part household bleach to 1-part water and sprinkle this mixture over the moss using a sprayer. Leave this to soak into the moss for 30 seconds before using a hose to wash away or a stiff brush. Be careful not to get the bleach on desirable flora as this could also kill other plants!
Combining vinegar, water and baking soda is ideal for targeting the toughest algae stains and mould growth. In a large container, add two parts white vinegar to one part water and stir in three heaped teaspoons of baking soda.
If your concrete is dull and sprouting weeds or mold, bleach is your best option for cleaning and brightening concrete. Mix a cup of bleach into a 5-gallon bucket of warm water, then spray or pour over concrete. Rinse thoroughly with water.
Apply the bleach solution
Allow the bleach solution to contact the surface for up to 15 minutes. Work in smaller sections if the patio is too large to finish in that time.
TIP 5: USE BLEACH OR VINEGAR
Oxidized bleach immediately starts to kill algae cells once it comes into contact with it.
Simple Green Oxy Solve Concrete and Driveway Cleaner can be used with a power washer or for manual cleaning of concrete surfaces including driveways, sidewalks, patios, and walkways.
This outdoor cleaner is perfect for vinyl, aluminum siding, roofing, gutters, concrete driveways, wood, and other common materials. Remove stubborn stains and get sparkling clean surfaces with OxiClean Outdoor Multi Purpose Concentrated Cleaner.
Vinegar is an all-natural solution for cleaning concrete. It kills mildew and mold, removes grime, and helps treat set-in stains.
Hardware stores and home centers sell products designed to kill moss and algae, but you can save money by using inexpensive chlorine bleach or a non-creamy hand dishwashing detergent, such as Dawn.
To eliminate and prevent green algae in a swimming pool, start by adding an extra dose of chlorine to your pool to shock the algae and stop the bloom. Let the chlorine work overnight, then test the pH levels of the pool in the morning to see if the pH is back to normal.
If you have an algae problem, your best friend is white vinegar. White vinegar can quickly kill algae but is not harmful to birds, insects and the majority of plants.