The Best Anti-Mould Paint for Bathrooms and Kitchens

Black spots creeping across your bathroom ceiling or kitchen corners are one of the most common household frustrations in the UK. Anti-mould paint can help keep those surfaces clean and fresh — but only if you tackle the cause of the damp as well as the symptom.

The best anti-mould paint is a moisture-resistant, fungicidal coating designed for high-humidity rooms — such as Ronseal Anti Mould, Dulux Easycare Bathroom+, or a dedicated anti-condensation paint like Thermaguard. It works best when combined with better ventilation and heating, because paint alone will not fix a persistent damp problem.

In this insight, we explain why mould forms, how anti-mould and anti-condensation paints differ, how to prepare the surface, and which brands are widely available in the UK.

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Key Takeaways

• Mould grows where warm, moist air meets a cold surface and condenses — typically bathrooms, kitchens and cold external walls.
• Anti-mould paint contains a fungicide that stops mould spores taking hold on the painted surface.
• Anti-condensation paint adds a slightly insulating layer that keeps the wall warmer, reducing the condensation that feeds mould.
• Paint treats the surface, not the cause. Ventilation, heating and fixing any leaks are essential for a lasting result.

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Why Does Mould Form?

Mould is caused by excess moisture. When warm, humid air — from showers, cooking, drying laundry indoors or simply breathing — meets a cold surface such as a ceiling, window reveal or external wall, the moisture condenses into tiny water droplets.

Those damp patches are the perfect breeding ground for black mould spores.

That is why mould clusters in predictable places: above the shower, behind furniture pushed against cold walls, in window corners and in poorly heated rooms. It is a condensation problem far more often than a leak, though you should always rule out plumbing leaks, roof problems and rising damp first.

Two things reduce condensation: removing moist air (ventilation) and keeping surfaces warmer (heating and insulation). Cold rooms condense more moisture, so surfaces that stay chilly attract the most mould — one reason our guide on whether radiator reflectors work is worth a read if a wall feels permanently cold.

With energy costs still a concern for many households, our look at whether energy prices will go down may also help you plan how much you heat problem rooms.

Anti-Mould vs Anti-Condensation Paint

The two are related but do slightly different jobs, and the best results often come from using them together.

• Anti-mould paint contains a built-in fungicide (a biocide) that prevents mould and mildew from growing on the paint film. It is the go-to for ceilings and walls that keep going mouldy despite being clean.
• Anti-condensation paint contains fine insulating fillers that make the painted surface slightly warmer to the touch. A warmer surface condenses less moisture in the first place, so there is less water for mould to feed on. Many products combine both features.

For a shower ceiling that keeps blackening, an anti-mould bathroom paint is usually enough. For a cold external wall or a chronically damp corner, an anti-condensation coating tackles the root cause more directly.

How to Prepare the Surface

Painting straight over existing mould is the most common mistake — the spores simply grow back through the new coat. Prepare properly first:

• Kill the mould: treat the affected area with a proprietary mould remover or a diluted fungicidal wash, following the product instructions. Wear gloves and a mask, and ventilate the room.
• Clean and dry: wipe away the dead mould and let the surface dry completely. Damp surfaces stop paint adhering and curing.
• Fix the source: check for and repair any leaks, and make sure extractor fans actually vent outside.
• Repair and prime: fill any cracks or flaking areas, and use a stain-block primer if brown or black staining is showing through.
• Apply two coats: most anti-mould paints need at least two coats for the fungicide layer to work effectively.

Why Ventilation Matters

No paint can outperform a room full of trapped moisture. Alongside painting, small habits make a big difference:

• Run an extractor fan (or open a window) during and after showering and cooking.
• Keep a small gap between furniture and cold external walls so air can circulate.
• Avoid drying washing on radiators in unventilated rooms.
• Keep problem rooms gently and consistently heated rather than letting them go cold and then blasting them.

Think of anti-mould paint as insurance for surfaces you have already dried out and ventilated — not a substitute for doing so.

Brands Widely Available in the UK

These ranges are stocked in most UK DIY stores:

• Ronseal Anti Mould Paint — a popular fungicidal paint that resists mould for years, in matt and other finishes.
• Dulux Easycare Bathroom+ and Kitchen+ — moisture- and steam-resistant emulsions with anti-mould protection, in a wide colour range.
• Zinsser Perma-White — a well-regarded mould-resistant interior paint often used in bathrooms and kitchens.
• Thermaguard and similar anti-condensation coatings — specialist paints that add an insulating layer to cold walls and ceilings.

If the outside walls of a damp room are also tired, a breathable exterior coating can help keep them drier — see our guide to the best masonry paint.

Painting the Rest of the Room

Refreshing a bathroom or kitchen often means more than the walls. Our related guides cover the other surfaces:

• The Best Tile Paints for dated bathroom or kitchen tiles
• The Best Gloss Paint for woodwork and radiators
• The Best Fence Paints if you are also tackling the garden

Frequently Asked Questions

Does anti-mould paint really work?

Yes, on the surface it covers — the fungicide stops mould growing on the paint film. But it cannot stop new mould appearing elsewhere if the underlying condensation or damp problem is not addressed.

Can I paint over existing mould?

No. Always kill and remove the mould with a fungicidal treatment and let the surface dry first, otherwise it will grow back through the fresh paint.

What is the difference between anti-mould and anti-condensation paint?

Anti-mould paint contains a fungicide that stops mould growing. Anti-condensation paint adds an insulating layer that keeps the surface warmer, so less moisture condenses on it in the first place. Some paints do both.

Will anti-mould paint fix damp?

No. It manages surface mould caused by condensation. Rising or penetrating damp, or a leak, needs the underlying cause fixed by a specialist — paint alone will not solve it.

Anti-mould paint is an effective tool for keeping bathrooms, kitchens and cold walls clean and fresh, and anti-condensation versions go a step further by tackling the cold surfaces that cause the problem. But the paint is only half the job.

Kill the existing mould, improve ventilation and heating, and fix any leaks first — do that, and a good fungicidal or anti-condensation paint will keep those black spots from coming back.