How to remove mould from sealant?

Mould in sealant is common, especially in damp rooms such as the bathroom. Condensation and lingering moisture allow mould to attach to sealant edges. We recommend tackling mould on sealant promptly with a product that has been specially developed and officially approved for this cleaning task. This helps prevent the contamination from spreading further and keeps the space fresher and more hygienic for longer. Always check the manufacturer's maintenance instructions for the surface beforehand.

HG solutions for removing mould from sealant

Mould on sealant often develops in areas where moisture lingers for extended periods, such as around showers, baths and washbasins. Because sealant is an elastic material, removing mould requires a targeted approach. We offer specialist HG products that have been specifically developed and officially approved for removing mould from grout and other surfaces:

• Use HG mould remover foam spray. This effective mould cleaner features a unique foam formula that stays in place longer, delivering better and longer-lasting action. The foam spray has a less pungent odour, is easier to direct and reduces splashing. Suitable for tiled and rendered walls (including marble and other natural stone) and grout in bathrooms, showers, toilets, kitchens, cellars, basements, saunas, swimming pools, garages and sheds. The product has a bleaching effect; if in doubt, test first on an inconspicuous area.
• There is also HG mould spray. This product destroys mould instantly on damp areas, both indoors and outdoors, without scrubbing or rubbing. Suitable for tiled walls (including marble), grout and render in bathrooms, showers, toilets, kitchens, cellars, basements, saunas, swimming pools, garages and sheds. It bleaches grey and black mouldy areas.
• For additional guidance and practical advice on how to get rid of mould and limit mould in the bathroom, you will find comprehensive information on our website.

Note: If the mould is in or under the sealant, our products cannot remove it. In this case, replacing the sealant is often the only solution. Always use our products according to the instructions and test on an inconspicuous area first if you are unsure.

Solutions for removing mould from sealant

Mould on sealant is usually caused by moisture and insufficient drying of surfaces. In addition to using an officially approved cleaning product, it is important to address the conditions that promote mould growth. Household remedies and general cleaning products should not be used for this purpose: they have no official approval for mould removal and offer no guarantee of safe and effective results. Instead, focus on the general measures below:

• Ensure good ventilation during and after showering so that moisture is removed quickly and does not build up around sealant edges.
• Dry wet surfaces and sealant joints regularly to limit prolonged exposure to moisture.
• Clean sealant and surrounding surfaces consistently so that dirt cannot build up.

If mould continues to return or spreads further, this may indicate a deeper underlying problem. Always check the manufacturer's maintenance instructions and consult a specialist if in doubt.

Causes of mould growth on sealant

Mould growth on sealant can have various causes. In practice, we most often see the following factors:

• Damp environment: Rooms such as bathrooms and kitchens naturally have high humidity, which promotes mould growth on sealant.
• Poor ventilation: When damp air is not properly removed, condensation remains on sealant edges.
• Irregular maintenance: Sealant that is not cleaned regularly becomes soiled more quickly.
• Sealant wear: Over time, sealant can deteriorate, making it more susceptible to mould growth.

To help prevent mould growth on sealant, it is important to pay attention to ventilation, regular maintenance and timely replacement of ageing sealant. Always check the manufacturer's maintenance instructions and choose sealant suitable for damp rooms when replacing. Proper prevention measures can significantly reduce the likelihood of mould returning to your sealant. Regular inspection of sealant condition will help you identify potential issues before they become major problems.