What Is Sealcoating?

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What Is Sealcoating: Sealcoating protects the asphalt from cracking, and this allows the asphalt to last longer. When determining the life of your asphalt pavement, you must consider the following:  how much traffic it has, the amount of freeze/thaw cycles, and the exposure to different types of weather. Sealcoating asphalt pavement properly can make it last for about 20 years.


Asphalt pavement is one of the most expensive types of pavement to maintain, and this is because it is tough to repair. The asphalt is made up of tiny pieces of stone and rock. Consequently, when these small pieces break off the pavement, they create holes in the pavement.

What is Asphalt?

Asphalt is a mixture of sand, stone, and petroleum products, and these create a black tar-like substance that we apply to a surface using a spreader. The asphalt is spread over the surface using a paver machine.

Reasons for Deterioration

Several things can cause the asphalt to crack or break down. These include heat, water, and sunlight. Heat causes the asphalt to expand and contract, and as a result of this, it makes it weaker. Water causes the asphalt to swell and shrink. Hence, the asphalt cracks.

Sunlight causes the asphalt to darken, leading to the asphalt becoming brittle. Moreover, it makes it weak and more prone to cracking. Asphalt pavements experiencing these factors will need replacing.

Types of Sealcoat

There are several different types of sealcoating available. A polymer-modified bitumen is one of the most common. This is usually a combination of asphalt and rubber. Another type is a liquid polymer; you apply this synthetic polymer directly to the asphalt.

When you first lay asphalt pavement, you must seal it with sealcoating. As a result, this prevents moisture from entering the asphalt. After laying the pavement, sealcoat it within the first two weeks. In addition, the sealcoat should be reapplied every five years. Due to not applying sealcoat regularly, the pavement will begin to crack.

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