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Why Aggregates are used in Sealcoats

It’s become commonplace today to use a mineral aggregate in the sealcoating process. Almost all of the major sealcoat manufacturers recommend the use of aggregate in their sealcoat manufacturers recommend the use of aggregate in their sealcoat and sell the aggregate to go with their emulsion.


There are several reasons aggregate use has become more common. First, use of a mineral aggregate helps provide a good skid-resistant surface.

Second, use of a mineral aggregate makes for a more durable product and a longer-lasting surface. If a sealcoat contains aggregate, the traffic actually wears down the aggregate as is wears down the sealer which extends the life of the sealer. This is something that should be brought to the attention of property owners who are looking for ways to save money.

Third, technological developments have eased the application process where aggregate is involved. Agitator systems have been improved, making it easier to keep the aggregate in proper suspension before it is applied. Such improvements include thicker agitator shafts that can bear more stress and the development of split agitators.

Unless a property owner is looking for a slick surface – a brake-testing facility, for instance – it’s not a bad idea to use some type of aggregate in sealcoat applications.