Johnstone's White Gloss Radiator Paint Enamel - 750ml

Johnstone's Paint For Radiators in White Gloss is a brush-applied radiator enamel that gives steel and cast iron radiators a smooth, high gloss finish built to cope with the heat a working radiator produces. This larger 750ml tin covers several radiators or a whole room's worth of radiators and pipework, making it a practical size if you are painting more than one radiator in white gloss.

Key Features

• High gloss white finish with strong colour retention
• Specially formulated radiator enamel, not a general-purpose paint
• Brush application for full control around panels, valves and pipework
• Good flow and levelling to minimise visible brush marks
• Heat resistant formula suited to normal domestic radiator temperatures
• Suitable for steel and cast iron radiators, pipes and towel rails
• Larger 750ml size for multiple radiators, usually needs two coats

How to Use

Turn the radiator off and allow it to cool completely before starting. Clean the surface to remove grease, dust and any wax or polish residue. If you are painting over an existing glossy finish, lightly key it with fine abrasive paper so the new enamel has a surface to bond to, then wipe away the dust. Treat any rust with a suitable rust treatment and prime any bare metal before applying the topcoat.

Stir the paint well before use. Apply a thin, even coat with a good quality brush, working in the direction of any panel ridges and avoiding overloading the brush to prevent drips and runs. Leave the first coat to dry fully, then lightly key it again if a second coat is needed. Apply the second coat in the same way for a smooth, opaque finish. Allow each radiator to cure fully, typically 24-48 hours, before switching the heating back on so the enamel hardens properly.

Technical Specifications

Frequently Asked Questions

Can you paint a radiator with gloss?

Yes, a dedicated radiator gloss like this Johnstone's enamel is designed specifically to withstand the heat a radiator produces, unlike standard household gloss which can discolour, soften or lose adhesion when the radiator warms up.

How do you paint a radiator?

Turn the radiator off and let it cool fully, clean and lightly key the surface, treat any rust, then apply the enamel in thin, even coats with a brush, allowing each coat to dry fully before adding the next.

How many radiators will 750ml cover?

Coverage depends on the size and style of your radiators, but a 750ml tin will typically stretch across several standard radiators when applied in two coats, making it a sensible choice for multi-radiator jobs.

How long does radiator paint take to dry?

This enamel is typically touch dry within a few hours and recoatable the next day. Allow around 24-48 hours for a full cure before turning each radiator back on.

Can you use Johnstone's wood and metal paint on radiators?

General-purpose wood and metal paints are not designed to withstand sustained radiator heat and can discolour or fail over time. This dedicated radiator enamel is the more reliable choice for radiators specifically.

Can you paint radiator pipes with this?

Yes, this enamel is also suitable for pipework, giving a neat, matching finish when applied carefully with a brush.