Selection and Design of Sprayed Seals

Course overview
This training program (Units 1, 2, & 3) provides the audience with a comprehensive appreciation of the purpose and capabilities of sprayed seals, as well as the practical considerations concerned with their design, selection and construction.
It is both a refresher and more expansive insight into sprayed sealing principles and application that will benefit project managers, contract managers, asset managers and technical specialists in State Road Authorities and Local Councils. It will also benefit technical and operational staff who work for road construction contractors.
Level 101: Fundamentals of Sprayed Sealing provides an overview of what sprayed seals are and why they make up the majority of the Australian sealed road network. The types of sprayed seals and their component materials are discussed, alongside methods to assure appropriate selection of sprayed seal treatments for the variety of purposes they may can be applied to. An overview of the design procedure and construction methods are also described.
Level 102: Intermediate Selection and Design of Sprayed Seals includes a more in-depth focus on the seal design process and worked examples of these. Participants will gain a basic competency in designing single / single and double / double treatments.
Level 103: Advanced Selection and Design of Sprayed Seals includes detailed examples of geotextile seal designs and heavy vehicle traffic applications, as well as an interactive workshop in which participants can attain NTRO certification as sprayed seal designers.
Level 101 is a full day in-person training only and represents 8 CPD Hours. An NTRO Certificate of Attendance will be issued at the conclusion of the in-person training.
Event contact
Level 102 is a full day in-person training and online assessment and represents 10 CPD Hours. An NTRO Certificate of Merit will be issued at the conclusion of the training.
Event contact
Level 103 is 2 full days of in-person training, a comprehensive online assessment and a self-paced project, and represents 20 CPD Hours. An NTRO Certificate of Applied Knowledge will be issued at the conclusion of the in-person training.
Event contact
All States - 2025 Schedule
Selection and Design of Sprayed Seals workshops are offered in multiple locations around Australia.
Choose your preferred location below to see our course schedule for 2025.
- VIC
- NSW
- QLD
- SA
- WA
- NT
- TAS
- ACT
- Course Outline
- Learning Outcomes
- Learning formats
- Target Audience
Course Outline
Unit 1 – Fundamentals of Sprayed Sealing
- Fundamentals of sprayed seals
- The purpose of sprayed seals
- Types of sprayed seals
- Materials
- Materials used in sprayed seals
- How materials are specified
- Purpose and function of the materials
- Design and selection
- The goals of sprayed seal design
- How to design a sprayed seal
- How to select a sprayed seal
- Pavement preparation
- Pavement requirements for sprayed sealing
- Achieving an appropriate surface finish
- Construction
- Major steps in constructing sprayed seals
- Required equipment
- Troubleshooting
- Distress types for sprayed seals
- Cause of problems in sprayed seals
Unit 2 – Selection and Design of Sprayed Seals
- Sprayed Sealing Treatments & Selection
- Purpose and Effectiveness of Sprayed Seals
- Types of Seal Treatments
- Single / Single Seal Design Methodology
- Methodology Principles
- Methodology Overview
- Design Traffic and EHVs
- Single / Single Seal Design Example
- Double / Double Seal Design & Methodology
- Methodology Principles
- Methodology Overview
- Double / Double Seal Design Example
Unit 3 – Selection and Design of Sprayed Seals – Certification
- Single / single, double / double, geotextile seal and heavy vehicle / grain harvest traffic worked examples
- A half-day interactive workshop on sprayed seal design
Learning Outcomes
Unit 1 – Fundamentals of Sprayed Sealing
LO1 High-level understanding of the purpose of Sprayed Seal
LO2 High-level understanding of types of Sprayed Seal
LO3 High-level understanding of Sprayed Seal Materials
LO4 High-level understanding of application processes
Unit 2 – Intermediate: Selection and Design of Sprayed Seals
LO1 High-level understanding of sprayed sealing treatments and selection
LO2 Detailed-level understanding of single / single seal designs
LO3 Detailed-level understanding of double / double seal designs
LO4 Detailed-level understanding of initial seals
LO5 Detailed-level understanding of SAMI seals
Unit 3 – Selection and Design of Sprayed Seals Certification
NTRO certification as a sprayed seal designer
Learning formats
- Interactive workshop-style presentation including end-of-topic questions and concept checks to facilitate discussion and questions from participants
- Online quiz to confirm learning outcomes achieved
- Half-day workshop in sprayed sealing design, submitted by the participant at the end of the session to obtain NTRO seal design certification
Target Audience
State Road Authorities and Local Councils
- Project Managers
- Contract Managers
- Works Managers
- Asset Managers
- Engineers/Technical Specialists
Road Construction Contractors
- Engineers/Technical Staff
- Operational/Production Staff
Consultants and Road Designers