The best way to clean these flat surfaces is with a specialty circular cleaning machine. And although many contractors use water alone with this kind of equipment, application of even a small amount of specific concrete cleaner will make the job come out that much nicer in less time. Our "Concrete Cleaner" contains an organic solvent designed to dissolve and remove grease, oil, black tire marks and embedded dirt. And of course with all pressure washing using hot water will improve the cleaning and shorten the amount of time as well. Hotter water allows the surfactants and other components in the cleaners to work their best.
But even if you do not have rotary equipment you can get good results with a regular pressure washer. Just be sure to use the correct size nozzle, proper concentration of cleaner, all with the lowest setting possible for your machine to remove the dirt and follow your local ordinances in regards to the water run off or need for reclamation equipment.
Our "Concrete Cleaner" is organic, bio-degradable, is USDA approved and classified as a non toxic pollutant under the Clean Water Act.
Another problem that may come up when cleaning concrete, brick or rock surfaces is red rust deposits from hard water in areas where iron is in high concentrations. This red coloration can be a headache and many companies actually etch the top of a surface off to remove this color which in time can cause major damage. We have another solution. You can use our "Wood Brightener also called "Rust Remover" to remove those rust stains from white decorative gravel in flower beds and patios.
"Wood Brightener" contains a mild Oxalic Acid which when used at the proper mixture of 2 pounds of cleaner per 5 gallons of water it will remove the rust color safely from the rocks in and around flower beds. You can spray on with a hand pump and allow it to sit for about 5 minutes and then rinse well with water. Repeated applications maybe needed if buildup is sever and has been on the rock surfaces for a long time. Repeating the application is safer for plantings rather than increasing the solution strength or dwell time or using high concentrations on bleach. Have patio furniture that left rust marks, no problem, just take a look at these before and after photos, no bleach was used, just "Wood Brightener".
Nothing improves the curb appeal of a home more than having a clean bright appearance.