Your driveway is a very important feature which is often overlooked when it comes to building your home or even when renovations are carried out. A well presented bitumen driveway can make a real difference to the visual approach to your home, increasing its value and lowering your driveway maintenance. A bitumen spray seal is a two coat system. Liquid bitumen is sprayed onto a prepared road base surface. A 10mm aggregate is spread in a uniform layer and rolled. A second coat of bitumen is sprayed followed by a layer of 7mm aggregate and rolled again. Compact with rollers Precoated aggregate Liquid bitumen is sprayed on to a compacted ROADBASE surface or over existing bitumen.