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.

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  1. Crown All Purpose Primer PX3 White
    From £10.37 £8.64 Was £12.20
  2. Crown Trade All Purpose Primer PX4 White
    From £10.43 £8.69 Was £12.26
  3. Zinsser Allcoat Exterior Satin SB Colours
    From £23.15 £19.29
  4. Aqua Undercoat Dark Grey
    From £18.91 £15.76
  5. Coo-Var Red Oxide Metal Primer
    From £25.39 £21.16
  6. Teamac Rapidry Primer Red Oxide
    From £23.63 £19.69
  7. Zinsser Perma White Matt
    From £16.94 £14.12
  8. Johnstones Aqua Undercoat Tinted Colours
    From £20.64 £17.20
  9. Zinsser Allcoat Exterior SB GLoss Black
    From £28.13 £23.44
  10. Zinsser Allcoat Exterior SB Gloss White
    From £28.13 £23.44
  11. Zinsser Allcoat Exterior SB Satin Black
    From £21.38 £17.82

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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.