Power-washing & street sweeping companies are using the OS liquid or oil Solutions liquid to clean old stains on asphalt, cement & wood. Similar to an old oil stain in your driveway. These are impossible to clean. You can try anything soaps, degreasers and the products in the local hardware stores that don’t work. We have all tried them, Oil Solutions liquid or OS liquid is the only product in the world that will remove an old oil stain with very little effort. To quote “PBF” energy in California as they trained there people to use the product and clean up a large area old fuel spill that had penetrated a soil area for years. PBF said pour the step 1 on then pour the step 2 on, step back and watch the magic. Of coarse the OS liquid was successful cleaning the PBF refinery in California. Power-washing companies have been using the OS liquid to clean wal-mart parking lots in Texas and Louisiana, these parking lots are riddled with oil stains due to so much car traffic. These oil stains are toxic they are slippery and unsightly, Power-washing co use the product to treat these stains with great success to remove the oil stain and to stop the oil from eating and deteriorating the asphalt which breaks up and destroys the asphalt. Once the OS liquid is applied it neutralizes the oil stopping this break down in the asphalt. The asphalt is then back to normal and will last a very long time. OS liquid also allows you to re seal the asphalt at that time. If you try and reseal over the oil stains the seal does not adhere properly and stain comes right back through. The OS liquid removes the old stain and allows you to seal over it safely.