Yes. A natural cleaner can help remove mould growing on the surface of silicone sealant. However, if black mould has worked into old, damaged or deteriorating silicone, cleaning may not fully restore it. In that case, replacing the silicone can be the better option.

Mould on bathroom silicone is common around showers, baths, basins and sinks because these areas often stay damp. At Leaf & Life, we prefer dealing with mould without automatically reaching for harsh cleaners. Our mould-cleaning formula uses concentrated clove oil together with organic coconut probiotic vinegar.

But the cleaner is only part of the solution. If a bathroom has a leak, poor ventilation or surfaces that stay wet for long periods, mould can return. Moisture control matters just as much as cleaning.

Why Does Mould Grow on Silicone Sealant?

Silicone sealant is commonly used around showers, baths, sinks and other wet areas because it helps stop water getting into gaps.

The problem is that these same areas create good conditions for mould.

Bathroom silicone may regularly be exposed to:

• Water from showers and baths

• Steam and condensation

• Poor airflow

• Soap, shampoo and body-product residue

• Water sitting along silicone joints

• Small cracks or gaps in ageing sealant

When silicone stays damp, mould has more opportunity to grow.

Even mould-resistant silicone is not completely mould-proof. Dirt and residue can build up on the surface, while older silicone may become harder to keep clean.

This is why black mould on silicone often starts as a few small spots around shower corners or along the bottom of a shower screen before becoming more noticeable.

Can a Natural Cleaner Remove Mould From Silicone?

A natural mould cleaner can help when the mould is mainly growing on the surface.

The condition of the silicone is important. Before we clean mouldy silicone sealant, we would look at whether we are dealing with surface mould, staining or failing silicone.

Surface mould

Cleaning is most likely to help when:

• There are small black or grey spots.

• The silicone still feels smooth.

• There are no cracks.

• The sealant is not peeling.

• The silicone is still firmly attached.

This is the best time to deal with shower silicone mould. Cleaning it before the problem becomes heavy can also make ongoing bathroom care easier.

Mould staining

Sometimes the visible mould can be cleaned away while a dark stain remains.

That does not always mean the area needs stronger chemicals or harder scrubbing. Mould can leave staining behind, particularly on older silicone.

Repeated aggressive scrubbing may also damage the sealant.

If the silicone is still sound but remains slightly marked after proper cleaning, the remaining colour may be staining rather than something that can simply be scrubbed away.

Damaged or deeply affected silicone

Cleaning has limits.

We would consider replacing mouldy silicone when it is:

• Cracked

• Peeling

• Splitting

• Pulling away from the tiles

• Loose around the edges

• Badly or permanently stained

• Showing mould underneath or behind the sealant

At this point, applying more cleaner may not solve the real problem.

Cleaning can remove contamination from a surface. It cannot repair failed silicone.

What Makes a Natural Mould Cleaner Different?

For us, natural mould cleaning is not simply about avoiding one particular chemical. It is about choosing ingredients that suit the job while using them correctly.

Organic coconut probiotic vinegar

Vinegar is commonly used as part of routine mould cleaning because it can help clean affected surfaces and remove residue.

In our Leaf & Life mould-cleaning formula, we use organic coconut probiotic vinegar rather than relying on standard household vinegar alone.

The goal is to help clean the affected area as part of a formula made for mould-related cleaning.

Concentrated clove oil

We also use concentrated clove oil in our mould-cleaning formula.

Clove oil contains naturally occurring compounds, including eugenol, and published laboratory research has reported antifungal activity from clove essential oil against a range of fungal species.

We use concentrated clove oil as part of our approach to targeting mould rather than focusing only on making dark marks less visible.

However, we do not believe any cleaner should be treated as a substitute for fixing moisture problems.

If water is leaking behind a shower, condensation is constantly building up or the bathroom has poor airflow, the conditions that allowed mould to grow are still there.

How to Clean Mould From Silicone Sealant Naturally

If the silicone is still in good condition, a natural mould cleaner may be worth trying before replacement.

1. Check the silicone

Before cleaning, inspect the sealant carefully.

Look for:

• Cracks

• Loose edges

• Peeling sections

• Gaps

• Silicone separating from the wall or tiles

• Very deep black staining

If the sealant is already failing, repeated cleaning is unlikely to solve the problem. Replacement may be more practical.

2. Ventilate the bathroom

Turn on the exhaust fan and open a window where possible.

Keeping air moving helps reduce moisture while you clean and helps the area dry afterwards.

Good ventilation is also important for reducing the conditions that allow bathroom mould to keep developing.

3. Apply the natural mould cleaner

Apply the mould cleaner evenly to the affected silicone according to the product directions.

When using our Leaf & Life mould-cleaning spray, we recommend following the directions and contact time shown on the product label.

We would not mix mould cleaner with another cleaning chemical. Combining cleaning products can create unnecessary risks and does not mean the surface will become cleaner.

4. Wipe or gently scrub

Use a soft cloth, soft toothbrush or non-abrasive cleaning brush if the area needs some light agitation.

Avoid steel wool, sharp tools and very aggressive scrubbing.

Silicone is flexible, but damaging its surface or pulling it away from the joint may allow moisture to reach areas that are even harder to clean.

5. Clean and dry the silicone

Remove loosened mould and remaining residue as directed on the product label.

Then dry the silicone thoroughly and keep the bathroom ventilated.

Drying is an important part of the process. Cleaning the area and then allowing water to sit around the sealant again can quickly recreate the damp conditions mould prefers.

What If the Black Marks Are Still There?

If black marks remain after cleaning, more cleaner is not always the answer.

There is an important difference between active visible mould growth and staining left in the silicone.

We would use this simple guide:

If silicone feels clean but remains badly discoloured, replacement may give a better result than repeatedly scrubbing the same area.

Natural Mould Cleaner vs Bleach on Silicone

We do not think this needs to become a simple argument that natural cleaners are good and bleach is bad.

Both approaches have limits.

The key issue is the condition of the silicone and the amount of moisture in the bathroom.

Bleach may change the appearance of some mould staining, but it does not repair cracked sealant or fix a leaking shower.

A natural cleaner also cannot solve a leak or poor ventilation.

That is why we focus on both proper mould cleaning and moisture control rather than promising that one product alone can prevent every future mould problem.

When Should Mouldy Silicone Be Replaced?

Cleaning is worth trying when the silicone is still sound.

Replacement becomes more sensible when:

• The silicone is cracked.

• The sealant is peeling away.

• There are gaps around the joint.

• Water can get behind the silicone.

• Black staining remains after proper cleaning.

• Mould appears to be growing underneath the sealant.

• The silicone has hardened or deteriorated.

• Mould quickly appears again from beneath the seal.

The simple rule is:

If the silicone itself has failed, cleaning will not repair it.

Removing the old sealant and resealing the area can help restore the waterproof joint and remove material that can no longer be properly cleaned.

How to Help Stop Mould Returning to Shower Silicone

Removing mould is only one part of keeping bathroom silicone cleaner.

Use the exhaust fan

Run the exhaust fan during showers and afterwards to help remove humid air.

Wipe wet silicone

If water regularly sits along the bottom of the shower or around silicone joints, wiping the area can help it dry sooner.

Fix leaks

Check for:

• Dripping taps

• Leaking shower screens

• Failed grout

• Loose seals

• Plumbing leaks

A small moisture problem can keep an area damp enough for mould to continue growing.

Improve airflow

Open windows where possible and make sure bathroom ventilation is working properly.

Clean early

A few small mould spots are generally easier to deal with than heavy black mould that has been sitting around the sealant for a long time.

Replace failing silicone early

If silicone has started to crack or pull away, dealing with it early may prevent water from getting into the gap behind it.

Frequently Asked Questions

Can vinegar remove mould from silicone sealant?

Vinegar can be useful for routine cleaning of surface mould. However, it may not remove permanent staining or solve mould that has affected damaged silicone. At Leaf & Life, we use organic coconut probiotic vinegar as part of our mould-cleaning formula.

Does clove oil kill mould on silicone?

Research has found antifungal activity from clove oil and compounds such as eugenol under laboratory conditions. In real cleaning products, results also depend on the formulation, concentration, contact time and condition of the surface.

We use concentrated clove oil as part of our mould-cleaning formula, but we still recommend dealing with leaks, humidity and poor ventilation if we want to reduce the conditions that allow mould to return.

Why does mould keep coming back on my shower silicone?

Common reasons include ongoing humidity, standing water, leaks, poor airflow and silicone that has started to fail.

If mould keeps returning, we would look beyond the cleaner and check what is keeping the area damp.

Can black mould be permanently removed from silicone?

Surface mould can often be cleaned when silicone is still in good condition. However, older silicone may remain stained even after cleaning. If the sealant is deeply affected, cracked or peeling, replacement may be necessary.

Should we replace mouldy silicone?

Not automatically.

If the mould is on the surface and the silicone is still firmly attached, cleaning is worth trying first.

We would consider replacement when the silicone is damaged, permanently stained, loose or showing mould underneath it.

Can we use a natural mould cleaner around shower silicone?

Yes, provided the product is suitable for the surface and is used according to its directions.

Always check the cleaner's label before use, especially when working on coloured, coated or unusual materials.

How do we stop mould growing around silicone?

Focus on the conditions around the silicone as well as cleaning it.

Keep the bathroom ventilated, dry wet joints when possible, repair leaks, clean early and replace sealant when it starts to fail.

Is every black mark on silicone active mould?

No. Silicone that has previously had mould on it can sometimes remain stained after the surface has been cleaned.

If repeated cleaning does not change the mark and the silicone is old or deteriorated, replacing the sealant may be more useful than continuing to scrub it.

Final Takeaway

A natural mould cleaner is worth trying when mould is sitting on otherwise sound silicone sealant.

At Leaf & Life, we use concentrated clove oil together with organic coconut probiotic vinegar in our mould-cleaning formula because we want to target mould while offering an alternative to automatically reaching for harsh cleaners.

But we also know when cleaning has reached its limit.

If shower silicone is cracked, peeling, separating or deeply stained, replacing it may be the better solution. And whatever cleaner we use, reducing moisture, fixing leaks and improving ventilation remain important if we want to reduce the chance of mould coming back.