What You Need
You may not pay attention to how your driveway looks daily, but a well-maintained driveway provides a great first impression of your home. Despite its tough exterior, unsealed concrete is porous and easily absorbs liquids, which can lead to stubborn stains. The texture of the surface also provides plenty of crevices for dirt, moss, and other materials to accumulate.
Oil spills, ground-in leaves and dirt, and everyday wear-and-tear make checking this home improvement task off your list seem overwhelming at first.
To clean a spotted and soiled concrete driveway, you'll need something that will be effective in removing oil and grease stains. Covering stains with cat litter, sawdust, baking soda, and other absorbent materials can take care of fresh surface spills, but do very little to absorb what sinks below the surface.
Trisodium phosphate (TSP) is widely used to clean oil off driveways. It is strongly alkaline, so it will not harm your concrete, but it could cause skin irritation and even burns. TSP is also very bad for the environment. If it ends up in lakes and streams, the phosphates trigger an overgrowth of algae that results in a depletion of oxygen levels in the water, which can endanger fish and other aquatic life.
Simple Green Oxy Solve Concrete and Driveway Cleaner tackles the same oil and grease stains without TSP's health risks or bleach's damage to your equipment.
To maintain the lighter color of a concrete driveway, many homeowners turn to cleaning with bleach, but power washing with bleach can damage many pressure washers, so check your manufacturer's guidelines before doing so.
Regular cleaning at least once a year can help maintain your home's curb appeal.
Before cleaning, hose down your driveway and allow it to dry. Also wet all nearby plants, shrubs, and grass with water. If your concrete is stamped or colored and you're going to be pressure washing, test for surface compatibility in an inconspicuous area with and without the cleaner.
Pressure Washer Application
Manual Application