An undercoat’s key purpose is to provide a smooth, uniform, even surface for topcoats. They are particularly useful with enamel topcoats, because they supplement topcoat film thickness and help impart a more substantial, denser finished look.

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  1. Aqua Undercoat Dark Grey
    From £18.91 £15.76
  2. Johnstones Aqua Undercoat Tinted Colours
    From £20.64 £17.20
  3. Dulux Undercoat (White)
    From £21.92 £18.27
  4. Johnstone's Joncryl Water Based Primer Undercoat White
    From £13.48 £11.23
  5. Armstead Quick Dry Wood Primer Undercoat
    From £9.24 £7.70
  6. Crown Trade Full Undercoat (White)
    From £17.86 £14.88
  7. Teamac Marine Undercoat
    From £20.58 £17.15
  8. Farrow & Ball 750ml Exterior Wood Primer & Undercoat
    From £21.49 £17.91
  9. Sandtex Flexible Primer Undercoat White
    From £14.14 £11.78
  10. Crown Trade Fastflow Quick Dry Primer Undercoat White
    From £9.52 £7.93
  11. Dulux Undercoat (Pure Brilliant White)
    From £24.12 £20.10
  12. Johnstones Professional Undercoat White
    From £10.49 £8.74

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Not sure which size?

Use our paint calculator to work out how much you need

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

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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.