Class 170 bitumen can be used for all standard spray sealing and lightly trafficked asphalt
Class 320 bitumen is primarily for use in asphalt, but can also be sprayed as a sealing
binder for heavy duty applications and in hot desert regions.
Class 600 bitumen is the hardest paving grade bitumen is mainly used to produce high
modulus asphalt for use in heavy duty asphalt pavements.