Tips to sealcoat a driveway include wearing the correct protective gear, removing dirt and stains prior to sealing the driveway, and working on small sections at a time. Avoid applying thick coats of the sealer. Once you apply the sealer, allow the surface to dry for more than 24 hours.
Read the manufacturer's instructions well before starting the project. Certain driveway sealers, including asphalt sealers, may cause skin irritation and other serious health problems, so wear gloves and protective clothing when working. Make sure the temperatures are about 45 degrees Fahrenheit and the weather is generally dry.
Use a shovel to clear grass from the edges of the driveway, and clean off the surface with a broom. Remove gas and oil stains from the surface with a strong detergent and hose. Alternatively, sprinkle detergent on the driveway, and clean it with a pressure washer. Allow the surface to dry.
Find a patching compound from a home improvement store and use it to seal cracks and holes. Mix the sealer thoroughly, and apply a thin layer, working from one corner at a time. Leave the sealer to dry before applying another coat. Erect a barrel or tie a yellow tape at your yard's entrance to keep away people.