How to Spread Asphalt Sealer

Asphalt sealant should be applied every two or three years to keep asphalt driveways and surfaces protected from moisture, salts, the sun, grease, gas and oils.

Sealers help protect against wear and tear and can extend the life of asphalt by providing additional strength, flexibility and integrity to roadways and driveways. Sealers also provide waterproof protection and increased resistance to freezing and thawing. You can spread asphalt sealer yourself with a squeegee/broom or a long-handled paint roller.

Repair all cracks and holes larger than 1/4-inch wide before applying asphalt sealant to your driveway or roadway. Do not apply sealants on days under 50 degrees Fahrenheit or above 100 degrees. The best time to apply is when the area will be rain-free for one to two days so the coating can properly adhere and dry.

Use a push broom to clean the area thoroughly, sweeping to remove debris and dust. Wash the area with a spray nozzle on a garden hose and remove any oily spots with detergent. You may prime oily spots with blacktop primer before sealing, if desired. Allow area to dry thoroughly.

Turn the sealer bucket upside down to allow the sealant mixture to settle to the top for easier mixing. After five minutes, return to an upright position and open the bucket, mixing it with a sturdy, clean stick until liquid is evenly dispersed. You will need to continue mixing occasionally during application to keep the sealant consistent.

Apply sealer with a combination squeegee/broom made for sealants or a long-handled paint roller. The former is the preferred tool for easier application. Work on small 20-foot areas at a time, beginning at one end of the driveway and working towards the other.

Spread the sealant evenly and generously without over-saturating the driveway, allowing small cracks and weathered asphalt to be well-sealed. Avoid spreading too thickly or you will have drying problems with the sealant.

Do not walk on the area for 24 hours or drive on the asphalt after sealing for 48 hours. Block off the roadway or driveway to ward off traffic.

Things You Will Need

  • Detergent (optional)
  • Asphalt primer (optional)
  • Push broom
  • Garden hose with spray nozzle
  • Asphalt sealant
  • Combo squeegee/broom
  • Sand


  • Sloped asphalt areas can receive improved traction by adding sand to the sealer mixture. Sand should be mixed in directly to the sealant before application. You can also sprinkle sand over wet sealant.


  • If sealant gets in your eyes, rinse with plenty of clean water. Seek medical attention if irritation develops.

About the Author

Abaigeal Quinn works as an international entertainment broker in the United States. She is a former news editor and insurance agent who began writing for a daily newspaper in 1995.