Ronseal 3 in 1 Mould Killer - 500ml - Bottle or Spray

3 in 1 Mould Killer


Fast-acting and kills mould on contact, all you need to do is spray it on and wipe it off. 3 in 1 Mould Killer is suitable for bare or previously painted walled and ceilings.

How to use 3 in 1 Mould Killer

Before you start

Test the mould killer on a small patch of your wall or ceiling to check the compatibility.

Wear gloves to protect your hands.


  1. Squeeze the trigger to break the tamper seal.
  2. Squeeze the trigger several times, applying the spray directly to the surface to ensure it’s wetted thoroughly.
  3. Leave for five minutes and use a damp cloth or sponge to wipe down the surface and remove the mould.
  4. Once the mould has been removed, wipe off any residual mess or grime with a clean damp cloth.


Take the suitable precautions to ensure mould does not reappear. Make sure rooms are well ventilated and use an extractor fan, or open windows when showering, bathing or cooking.

For more information on removing mould and preventing damp, read our guide.


Cloths and sponges can be rinsed in warm soapy water.

Technical specification

Usage Suitable for use on bare or previously painted walls & ceilings where mould is present
Durability Kills mould and prevents it from returning
Application Available in a bottle or spray
Sizes 500ml