For commercial and residential driveways. A sour seal last 3-4 years which is the best. We also give a one (1) year warranty*. We recommend you wait 24 hours before driving on your driveway to let our seal dry and get the best results. We clean the driveway with powerful leaf blowers to clear out the dust as well as using a wire brush to clean the sides of driveways to get rid of the dirt and grass. After that we use a small brush to seal the edges to get as close to the side walk and your house without the mess. We finish by using a large brush to seal the majority of the driveway. Once we are done, we put up caution tape to make sure no one enters.