Primer & Undercoat

Preparing your surface before painting is very important in order to get the most of your colour and ensure lasting power. Undercoats and primers although similar serve two quite different functions. While primer acts as a base for your paint to latch on to, an undercoat is used to provide a neutral foundation for colour to develop. If you are questioning the condition of your wall for painting, priming would be your best choice. Priming works to hide stains and prevent discoloration. It is best used on wood or metal surfaces and should always be used when changing from dark to light colours or when transitioning from a glossy base coat.

Always ensure your purchase one that is compatible with your chosen surface, we have a large selection to choose from including…

Order today and get free delivery on orders over £50.

Items 1-16 of 95

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  1. Rating:
    Leyland Acrylic Primer Undercoat White 5L
    £24.06 £20.05
  2. Rating:
    Dulux Undercoat (White)
    From £21.92 £18.27
  3. Rating:
    Crown Trade Full Undercoat (White)
    From £19.51 £16.26
  4. Rating:
    Dulux Undercoat (Pure Brilliant White)
    From £24.12 £20.10
  5. Rating:
    Johnstones Alkali Resisting Primer
    From £30.32 £25.27
  6. Rating:
    Johnstones Ultra Primer Sealer
    From £15.72 £13.10
  7. Rating:
    Macpherson Acrylic Primer
    From £10.18 £8.48
  8. Rating:
    Johnstone's Joncryl Water Based Primer Undercoat White
    From £12.83 £10.69
  9. Rating:
    Macpherson Undercoat White
    From £6.23 £5.19
  10. Rating:
    BIN Primer
    From £16.76 £13.97
  11. Rating:
    Cover Stain Primer
    From £7.62 £6.35
  12. Rating:
    Bulls Eye 1-2-3 Primer
    From £9.48 £7.90
  13. Rating:
    Dulux Weathershield Exterior Undercoat (PBW)
    From £24.95 £20.79
  14. Rating:
    Teamac Marine Undercoat
    From £20.58 £17.15
  15. Rating:
    Teamac Metaclor CR Primer
    From £19.04 £15.87
  16. Rating:
    Coo-Var All Metal Primer Red
    From £5.64 £4.70

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Not sure which size?

Use our paint calculator to work out how much you need

Enter the dimensions of your walls, details of any gaps like windows and doors, and click calculate

Remember: It's probably better to have a bit too much than to order too little!

Tell us your wall dimensions
Wall 1
How many windows and doors are there in the area you want to paint?

This is based on a coverage of 10m² per litre of paint and one coat of paint.

Make sure you always check the coverage on the product page before purchasing and, if covering a dark or bright colour, you may need two or three coats.