Bitumen is the liquid binder that holds asphalt together and is often mistakenly used as a term to describe an asphalt driveway.
Asphalt is produced in a plant that heats, dries and mixes aggregate, bitumen and sand into a composite mix used to make driveways and roads. It is then applied through a paving machine on site as a solid material at a nominated or required thickness, relative to the end use.
Asphalt has a smoother and more durable surface than a bitumen-sealed road or driveway and does not have the loose aggregate surface of a bitumen seal.
In comparison, a bitumen-sealed road or driveway has a layer of bitumen sprayed and then covered with an aggregate. This is then repeated to give a two-coat seal.
Asphalt driveways are far more durable and can be resurfaced when they eventually show signs of age.