With the wear and tear endured by asphalt surfaces, cracks and damage occur over time. Both crack filling and seal coating are used to extend the life of driveways and parking lots. Understanding the differences between the two solutions — and considering variables like the type and size of the cracks — will help you find the most cost-effective and durable method for your circumstances. Here’s what you need to know.

A Guide to Crack Filling vs. Seal Coating

Crack Filling

The method of crack filling consists of adding extra asphalt to the surface and patching over irregularities, such as fissures or potholes. Filling cracks with additional asphalt stops the growth of the cracks and prevents more from forming. It’s best to block the gaps, holes, and other flaws to halt the damage while they are still small. Once they become too deep or wide, it might be wiser to repave the entire area.

Seal Coating

Seal coating, on the other hand, can’t be used to fill cracks or potholes. This method does not replace missing asphalt from roads or parking lots. Instead, seal coating is a preventative measure used to create a protective barrier over the old layer of asphalt. The added coat defends against elements such as water, oil, and UV damage, slowing deterioration and prolonging the life of the surface. Seal coating can also fix tiny imperfections. Overall, this method helps to enhance the appearance of the asphalt and keep it in top condition for longer.