Can You Paint Over Anti Mould Paint?

Yes — you can paint over anti mould paint once it's fully cured, using a standard water-based emulsion. But there's a catch worth understanding before you reach for the colour charts: whatever you put on top becomes the new surface, and if that topcoat has no fungicide in it, you've covered your protection with a layer mould can happily live on. Here's how to think it through, from the team that makes Legacy™ Anti Mould Paint in East Kilbride.

The short answer, properly explained

Anti mould paint works at the surface. The fungicide in the cured film stops spores germinating on it — on the film itself. Mould grows on surfaces, not inside walls, so the protection only matters at the face the room air touches. Overcoat it with a standard emulsion and spores now land on that emulsion instead. The Legacy layer underneath is still there, still intact, but it's no longer the surface — so in a damp room, black spots can form on the topcoat as if the anti mould paint wasn't there.

That doesn't make overcoating wrong. It makes it a decision about the room:

• Dry rooms (living rooms, hallways, most bedrooms): overcoat freely. Humidity rarely gets high enough for mould, and the Legacy layer beneath still gives you a sound, sealed base.
• Damp rooms (bathrooms, kitchens, condensation-prone bedrooms, anywhere you had mould before): keep the anti mould paint as the finish coat. That's the whole reason you used it. Legacy's white matt is designed to be the final surface, not an undercoat.

How long should you wait before overcoating?

Let the anti mould paint cure properly first — not just touch-dry. Give it a good few days in a ventilated room before adding another coating on top. Recoating Legacy with itself (a second coat, or a future refresh) needs only the normal drying time between coats stated on the tin.

What topcoats work over it?

Can you tint anti mould paint instead?

People ask us this a lot, and the honest answer is we don't recommend adding tinters to Legacy. The formulation — including the fungicide loading we batch-test on every run — is balanced as manufactured, and third-party colourants change that balance unpredictably. If a room needs both colour and mould protection, the practical route is Legacy on the problem surfaces (ceilings, external walls, window reveals) and your colour on the dry walls. Most bathrooms photograph better with a crisp white ceiling anyway.

Frequently asked questions

Does painting over anti mould paint ruin it?
No — the layer underneath stays intact. But protection only works at the exposed surface, so a standard topcoat removes the benefit in damp rooms.

Can I paint over it with kitchen or bathroom paint?
You can, but most "bathroom paints" are just moisture-tolerant, not fungicidal. In a mould-prone room you'd be trading real protection for a sheen.

How soon can I apply a second coat of Legacy?
Once the first coat is fully dry to the touch — normal emulsion recoat times apply. Two coats are recommended for a continuous protected film.