3.1 Categories of Sealing Treatments
All sealing works are defined as one of three broad categories:
- initial treatment (an application of a prime or initial seal to a prepared basecourse)
- secondary treatment (an application of a sprayed bituminous treatment on an initial treatment)
- retreatment (an application of a sprayed bituminous treatment on an existing bituminous surfacing).
The typical life cycle and usage of these sprayed seal categories is demonstrated in the flow chart in Figure 3.1.