Sealcoat or asphalt sealer is a product applied after the asphalt surface. Usually, it is poured over the asphalt surface six months after hot asphalt has been applied. In the case of the repairs where hot or cold asphalt patch is used to fill up cracks or potholes, the sealcoat is applied on the patch one or two days after the repair job. With sealcoating, asphalt is protected from drying out and becoming brittle. An asphalt surface with sealcoat will not deteriorate easily even with exposure to weather changes since it is protected from the elements.
Sealcoating also starts with making sure that the asphalt surface is clean. It doesn’t matter whether a broom or a high pressure sprayer is used to clean the surface as long as the result is that the area of the asphalt patch is free from loose dirt, dead leaves, or other debris. Once clean, commence applying the sealcoat or asphalt sealer.
For sealcoating jobs after patching a pothole, doing it by hand will suffice. Thoroughly mix the sealcoat substance before applying it. Coat it over the repaired asphalt surface, making sure that it is evenly applied. As a general rule, it is best to apply a thin layer first then letting that thin layer dry out before applying the second layer. Applying a thick layer by hand carries the risk of the sealcoat not drying out correctly. Some people mix in sand with the sealcoat. The asphalt patch or the sealcoat will not last longer from the sand though. Rather, it is added to provide texture, which is sought after by those who want their asphalt surfaces less slippery.
A faster method of applying sealcoat would be with the use of a sprayer. In this instance however, it is more appropriate for when an entire driveway needs sealcoating than just a repaired pothole. A sprayer gives the advantages of faster and more even application. Mixing sand with the sealcoat is not advised when using a sprayer system. Whether sealcoating an asphalt patch or an entire driveway, it is best to do this every two to three years.