Painting radiators


Summary: Learn how to paint a radiator.



Before painting your radiators there are two important factors to remember:

  • Light colours radiate more heat than dark.
  • Paint with a gloss finish will radiate more heat than paint with a matt finish.

Painting

  • If the central heating system is in operation, isolate the radiator and let it cool down. The paint finish will be ruined if applied to a hot radiator or if it heats up soon after it has been painted.
  • Clean the radiator using a soft cloth and a non-abrasive and non-corrosive cleaning solution.
  • With a fine wet and dry paper key the surface of the old paint. This process can reveal previously hidden corrosion such as pin hole leaks. If this is the case you will need to replace the radiator.
  • Paint the radiator using a good quality pure acrylic matt or satin paint that is recommended for use on radiators. Avoid solvent-based paints, particularly if you are painting the radiators white, as these can develop a yellow tinge after six months or so.
  • Use a 5cm paintbrush and apply the paint by working from the top of the radiator downwards. Avoid painting over the valves, as this will make them difficult to open.
  • Allow the paint to dry for 24hrs before turning the radiator back on.

Use a 5cm paintbrush and apply the paint by working from the top of the radiator downwards.