Homeowners are using the OS liquid to clean new and old oil stains in driveways on asphalt and concrete. Mrs Sandervecky had her car repaired recently, when she got home she noticed an oil slick going down her driveway. She called the repair shop. They immediately came and took the car away but there was a 15ft by 2ft oil stain in her driveway and running into the street. The homeowner found OS liquid on youtube and gave us a call. We explained the OS liquid was designed for this type of clean up, but there is a process, it may take several applications and it leaves a white haze after the oil stain is completely removed. This white haze is of no danger and will disappear in time. The good news is, the oil is gone and will not continue to eat or deteriorate her driveway. You also have options after the oil is gone you can paint or reseal the driveway. This is something you cannot do if the there is any presence of oil. The OS liquid is non toxic, its simply applied to the stain and left overnight. You do an application every 24 to 48 hrs until the stain is gone. This issue with Mrs Sandervecky was resolved for under 800 within a few days with no disruption or inconvenience to the homeowner. Both the homeowner and the car dealer were both very happy. The other option was to dig up the driveway and build a new driveway. This was estimated at 18K