There’s nothing like the smell of fresh air after a rain. But do you ever notice a musty smell when you step outside after the rains? If you do, there’s a good chance it’s mold and mildew, and likely algae growing on your sidewalk like you see here. The problem can be worse where lawns have automatic watering systems, on sidewalks in shady areas or and those that have plants and shrubs bordering them.
The sidewalk above shows before and after cleaning with CWP ProClean POWER™ Cleaner Concentrate. That dark gray color is mold and mildew. Not only does it look bad and aggravate allergies, the mold and mildew eat minerals in the concrete eventually leading to the surface flaking off.
The image on the right show how the sidewalk looked after spraying it with CWP ProClean POWER™ Cleaner Concentrate™. Notice that reddish color? It means that the cleaner is working. One of the interesting features of the CWP ProClean™ line of cleaners is they use special surfactants that are also ‘chemical markers’. The color means that mold is present on the concrete sidewalk. When CWP ProClean™ products are sprayed on the concrete, those ‘chemical markers’ react to mold and other fungi species, turning shades red or yellow, as the cleaning breaks down the contaminants. (Learn more about the Science behind CWP ProClean™ here.)
Rinsing. You have two choices.
Pressure Washer. If have one available, a pressure washer is a good option for rinsing, particularly if you have a bad mold and mildew problem. A pressure washing can flush out cleaner and contaminants from deep in the concrete. But be careful. Pressure washing will degrade the surface of concrete over time with repeated use.
Garden Hose. No pressure washer; no problem. After spraying on CWP ProClean™, just lightly scrub the sidewalk with a stiff broom to loosen accumulated contaminants and rinse with a garden hose.
CWP ProClean™ is Safe for Landscaping.
You may also note in the pictures on on this page the grass was not affected at all. CWP ProClean™ won’t kill grass or landscaping; just rinse thoroughly.
What other Concrete Cleaning Jobs can CWP ProClean™ handle?
- Pre-treat first. Our cleaners are designed to penetrate deep into a contaminant. We recommend using a pump sprayer to apply the cleaners allowing it to dwell several minutes before rinsing. For heavy deposits and speedier removal, agitate the contamination with a brush before rinsing.
- Don’t apply cleaner to hot surface. Part of the magic of our cleaners is their deep penetration. Hot surfaces can evaporate the product before it gets deep enough to work effectively. If work on a hot day, cool the surface with water before cleaning.
- Works with pressure washers. Using CWP ProSeries® with your pressure washer will definitively step up your game. Although it can be added to your pressure washer’s additive tank, for best results, pretreat the area with the cleaner, then use your pressure washer to blast away that dirt.
Use CWP ProSeries® cleaners before painting. In addition to dirt, mold, mildew, algae, pollen and tree saps, many outdoor painted surfaces oxidize over time. Before you repaint, cleaning theses surfaces with CWP ProSeries® cleaners, to prepare the surface for paint. If cleaning removes paint in spots, its confirmation repainting is needed. In many cases, the surface just needs cleaned.
For more “How To” tips, visit our “How To” guides.