Mild detergent and water.
Mix some mild dish soap with water in a bucket to create suds, then use a brush or a sponge to scrub the surface of the pavers. If your pavers are textured or have intricate designs, this cleaning method can be gentler than a power washer.
The pressure washer in combination with a dirt cutter is an excellent option. This removes not only weeds and moss from the surface, but also from indentations. Keeping up with this type of cleaning means that there is less time for weeds to grow. It also helps to maintain the beauty of the paving stones' surface.
Remove limescale buildup with a 50:50 ratio of water and white vinegar. Spray the solution on the surface of your pavers and let it sit for a good 30 minutes before scrubbing with a scrubber brush and rinsing the pavers off.
To clean paver slabs, you can use a detergent, such as Dawn, or a vinegar-water solution that is gentle enough to effectively clean without causing damage to your concrete pavers.
Use a specialist cleaner
Try a specialist cleaner like Wet & Forget, at Walmart, which you spray onto the surface of the paving and leave. It can also be used on steps, fountains, patio umbrellas and other smaller outdoor areas. It's bleach-free and non-acidic but will remove mold, moss and grime without any scrubbing.
Cleaning your pavers with bleach has a lot of benefits: Disinfecting the Surface: Bleach is an effective disinfectant and can kill any bacteria or mold on the surface. This will help to prevent any health hazards from occurring. Removing Tough Stains: Bleach is also effective in removing tough stains from the surface.
Can you power wash pavers? Power washing (also known as pressure washing) is also a very effective method by which you can remove dust deposits and various stains from your pavers. Just make sure that the water jet is not directed directly at the joints between the paving stones.
Fill up a gallon sized bucket with water and add about 16oz of dish detergent. Mix the soap into the water thoroughly. Once your cleaning solution is ready, gently pour some onto your paver surface, working in small areas at a time.
If vinegar does not do the trick, you can also try mixing about a cup of bleach for each gallon of water and using this as your mold-killing spray solution.
White vinegar is good for cleaning pavers, though it's also acidic enough to erode the stones' surface. Diluted vinegar can be used safely to clean paving stones, though it should be used sparingly and infrequently to protect your paving from damage.
This acid wash can do severe damage to your concrete pavers. If the concentration is too high, the acid will start to eat away at the surface of the pavers. Closely follow the directions on the container to dilute the muriatic acid. Most products recommend a 12:1 ratio of water to acid.
3) USE A CLEANER FIRST
I used a bleach-free pressure washer concentrate and sprayed it over each section to help loosen the grime before going at it with a higher pressure nozzle. It didn't take long to apply and helps get those stubborn mildew stains out.
OxiClean is a powerful concrete cleaner that works well on various materials, including pavement and grout. This concentrated solution provides excellent cleaning without leaving residue.
Although bleach is great at the whitening effect, you can use peroxide to achieve this. Hydrogen peroxide is an oxygenated bleach. It is safe for plants, so when you rinse this solution, it won't harm anything. It works together with the dish soap and baking soda to remove dirt and whiten dirty concrete.
Baking soda has low-abrasive properties, making it an excellent cleaning material for stuck-on grime and tough stains. Additionally, baking soda is absorbent, allowing it to absorb oils from the surface of the pavers, especially freshly oil spill on concrete pavers.
Simple Green is one of the best cleaning products for dirty pavers. It doesn't have any harmful chemicals that could possibly warp your precious driveway. Less chemicals mean there's a less likely chance your paver stones will change to a weird-looking color.
Scrubbing Brush and Bucket
Ahhhh the good old-fashioned scrubbing brush. It's been around for such a long time as it genuinely works. When those bristles are passed over the target surface vigorously enough, it'll remove most dirt and stains.
Depending on the material of the paver (non-coloured concrete is safe), CLR may be suitable. Always spot test in an inconspicuous area first. Make sure the pavers are not coloured, stamped, sealed or coated.
Over time, it can destroy concrete as the acid weakens its structure. This will cause scaling, pitting, peeling, and cracking. If the acid wash gets into the soil, it will evaporate on the surface but remain beneath the surface (just like it does with concrete).