Clean, prime and paint copper heating pipes safely with heat-resistant paint for a tidy, lasting finish.
PC-01Turn off the heating and let pipes coolSwitch off the heating system and wait until the pipes are cool to the touch, at least an hour, ideally longer. Hot copper will blister paint and can burn you. Open a window or door for ventilation, as paint fumes build up quickly in a small space.
PC-02Protect the floor, skirting and wallLay a dust sheet under the pipe run. Mask the wall behind the pipe, the skirting board, and any flooring close by with masking tape and paper or thin card. Painting pipes is messy work close to a wall, and drips are easy to miss until they've dried.
PC-03Clean and degrease the pipesWipe the pipes down with sugar soap solution to remove dust, grease and old fingerprints, then rinse with a damp cloth and let them dry fully. Grease under paint causes it to peel within weeks, so don't skip this even if the pipes look clean.
PC-04Sand to key the surfaceRub the pipes lightly with a fine abrasive pad to key existing paint, or to remove light oxidation and dull the shine on bare copper. Wipe away the dust with a dry cloth afterwards. Wear gloves, as copper edges and old paint flakes can be sharp.
PC-05Prime any bare copperIf you can see bare copper anywhere along the pipe, apply a coat of metal primer to those patches only. Skip this step entirely if the pipe is already fully painted and you're just refreshing the colour. Let the primer dry fully according to the tin, usually a few hours.
PC-06Apply the first coat of heat-resistant paintUse a paint sold as heat-resistant radiator or pipe enamel, rated to at least 60°C, since central heating pipes run hot. Brush along the pipe in the direction it runs, working from one end to the other in a thin, even coat. Avoid painting over valve spindles or any moving part of a radiator valve.
1 250ml tin · Heat-resistant enamel paint, radiator/pipe
PC-07Leave to dry, then apply a second coatCheck the tin for recoat time, typically 4-16 hours depending on the paint. Once touch-dry, apply a second thin coat for full, even coverage. Two thin coats look better and last longer than one thick coat, which can sag or crack when the pipe heats up.
PC-08Remove masking and leave to curePeel off the masking tape and paper while the paint is still slightly soft, so the edge comes away clean rather than tearing dried paint. Leave the pipes untouched for at least 24 hours before running your hand along them, and check the tin for the full cure time before restoring heat.
PC-09Wait before turning the heating back onDon't turn the heating back on until the paint has fully cured, usually 24-48 hours, even if it feels dry to the touch. Heating the pipe too soon can soften the paint and leave marks or a tacky finish that never fully hardens.
PC-10Clean up and dispose of waste safelyClean brushes in white spirit or warm soapy water, depending on the paint type, and let used cloths dry flat outdoors before binning them, as solvent-soaked rags can be a fire risk if bunched up. Fold the dust sheet inward to trap any drips and take masking waste straight to the bin.