Primers

1. © 2013 City and Guilds of London Institute. All rights reserved.
Level 2 Diploma in Painting and Decorating
Primers
Unit 215: Preparing surfaces for decoration

2. © 2013 City and Guilds of London Institute. All rights reserved.
Level 2 Diploma in Painting and Decorating
Learning outcomes
1. Know how to prepare timbers and timber sheet products ready to
receive finishing systems.
2. Be able to prepare timbers and timber sheet products ready to
receive finishing systems.
3. Know how to prepare metal surfaces ready to receive finishing
systems.
4. Be able to prepare metal surfaces ready to receive finishing
systems.

3. © 2013 City and Guilds of London Institute. All rights reserved.
Level 2 Diploma in Painting and Decorating
What are the functions of a primer?
• Provide a base for the paint system
to adhere to (stick)
• Protect the surface
• Even out porosity
• Seal the surface
• Form a barrier between the
surface and subsequent
paint system

4. © 2013 City and Guilds of London Institute. All rights reserved.
Level 2 Diploma in Painting and Decorating
Primers used in painting and decorating
Group task
1.In groups list primers used in painting and decorating.
2.Discuss your findings, compare and analyse.
3.Complete Activity 8.

5. © 2013 City and Guilds of London Institute. All rights reserved.
Level 2 Diploma in Painting and Decorating
Substrates
Task
Can you identify the primers used for the following substrates in painting
and decorating?
•Hardwood
•Softwood
•Non-ferrous metal
•Ferrous metal
•Timber boards
•Plastics

6. © 2013 City and Guilds of London Institute. All rights reserved.
Level 2 Diploma in Painting and Decorating
Primers for substances
Task
1. How would a painter/decorator
choose the correct primer for the
substrate? Compile a list and
discuss in groups:
• Job specification
• Schedule of works
• Manufacturers' instructions
(data sheets)
• Experience

7. © 2013 City and Guilds of London Institute. All rights reserved.
Level 2 Diploma in Painting and Decorating
Metal and timber primer and undercoat
Watch the first 1 minute and 20 seconds of this video:
http://youtu.be/VdO9lw0xFps
Task
• What protects the knots in softwood?
• What pigment is found in metal primer?
• What is the purpose of an undercoat?

8. © 2013 City and Guilds of London Institute. All rights reserved.
Level 2 Diploma in Painting and Decorating
Finishing coating
Watch this video:
www.youtube.com/watch?v=J_xwiUouzZc
Task
Discuss a water and an oil-based paint system for a softwood skirting.
Acrylic primer Acrylic undercoat Acrylic gloss
Aluminium
wood primer Alkyd undercoat Alkyd gloss
In groups compile a risk assessment for a water-based paint system.

9. © 2013 City and Guilds of London Institute. All rights reserved.
Level 2 Diploma in Painting and Decorating
Risk assessment
Consider the following:
• Risks/hazards
• People who may be harmed
• Risk rating
• Prevention/control methods
• Review and monitoring

10. © 2013 City and Guilds of London Institute. All rights reserved.
Level 2 Diploma in Painting and Decorating
Questions
• Identify a metal primer that helps eliminate rust.
• Identify a water-based wood primer.
• State two reasons for using a primer.

11. © 2013 City and Guilds of London Institute. All rights reserved.
Level 2 Diploma in Painting and Decorating
Any questions?