Sprayed Sealing Selection & Design

Level of difficulty: Advanced


A spray seal design is a complex and technical process that requires a high level of competence and expertise to ensure a safe, durable, and effective outcome.

The selection of treatments involves different costs and risks in performance outcomes. Designers are required to use their own experience and judgment in the selection and detailed design of the surfacing.

Successful completion of the AfPA Sprayed Sealing Selection and Design course is recognised as the industry standard in order to be acknowledged as a competent spray seal designer. The Queensland Department of Transport and Main Roads require Seal Designers to have successfully completed this course and be added to the Spray Seal Design Registry.

Benefits of the course

Reduce the risk of failures, maximise your value for money and minimise liability by selecting and designing a sprayed seal which will suit the traffic, pavement and environmental conditions using a rational, reliable, proven approach.


This course focuses on when and where sprayed treatments can be used by introducing participants to the strengths and weaknesses of the various types of sprayed treatments commonly used including the types of surface defects that may be corrected.

Instruction is provided on the use of the current Austroads seal design method for priming, primersealing and sealing, using real world examples and interactive workshop sessions.

Who should do this course?

Engineers, supervisors, consultants and technical officers who are responsible for specifying, selecting, reviewing or designing sprayed treatments.


At the conclusion of this course participants should be able to:

  • describe the types of sprayed treatments used on new works and for retreatments
  • explain the functions of the various types of sprayed treatments
  • select sprayed treatments for new works and retreatments
  • design primes, primerseals, single/single, double/double, high stress seals, extreme stress seals, geotextile seals and polymer modified seals
  • explain the effect on seal performance due to changes in seal design inputs.

Assessment is a written assignment to be submitted and marked.

Course attendance is a per-requisite of assessment.  Only participants who successfully complete the assignment will be displayed on the AfPA website as approved Seal Designers (QLD only).

Engineers Australia CPD

Engineers Australia members may record Continuing Professional Development (CPD) hours for attendance at AfPA courses. Refer to Engineers Australia’s CPD Policy for requirements and conditions.

Types and conditions of CPD & Key CPD Requirements: http://bit.ly/1WkuYS6

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