How to Seal Over Asphalt Shingles

Asphalt shingles are used on 80 to 85 percent of all residential roofs. Because of this, there is a large segment of the population who would have an interest in sealants for asphalt shingles. Adding a sealant to asphalt shingles extends the life of the roof, which saves money for the homeowner. Although you can apply a sealant yourself using a sprayer or roller, if you are unsure of your capabilities, it is best to hire a professional for the job to avoid injury from falling off of the roof.

Liquid sealant for asphalt shingles will extend the life of the roof.
  1. Inspect the roof for any damaged shingles, and then repair or replace them before applying sealant to the roof.

  2. Spray an even coat of liquid sealer over the entire roof, using a professional pressurized sprayer. Allow the shingles to dry for a couple of hours. Although you can use a full-nap paint roller to do the job as well, a professional sprayer is much more efficient.

  3. Complete the job by spraying a second coat of sealer evenly over the roof.


  • Because this job must be performed in a standing position on the roof, it is recommended that a professional be hired for this type of work because of the high potential for serious injury.

About the Author

Monica Williams has been a freelance writer since 1995, writing diverse articles for various websites. She has developed a blog and video series to educate, guide and empower entrepreneurs. Williams is pursuing an Associate of Science in business from Georgia Perimeter College.