Sound quality stone is selected from Mawsons various hornfels, diabase, granifier and granite quarries to produce sealing aggregates. This stone is crushed and screened to specified gradings (5mm through to 20mm) and shape (flakiness, elongation and average least dimension) requirements. It is stacked in tracable lots in accordance with recognized quality assurance procedures.

Mawsons also offer washed aggregates and precoating services for the application of selected bituminous primers.