How to Remove Black Mould from Silicone Sealant

Black mould often grows in bathrooms but as well as looking terrible, it can also cause health problems. While tiles are easier to clean, black mould on a silicone sealant can be particularly stubborn and difficult to remove. Fortunately, there is an effective way to remove this black mould without having to resort to harsh chemicals such as bleach. Discover how to remove black mould from silicone sealant naturally with our guide below.

MMCS Commercial Cleaning is a family-owned cleaning company with over two decades of experience in making properties sparkle across the North East. From one-off deep cleans to regular office cleans around your schedule, we’ve got you covered using environmentally-friendly cleaning products. Get in touch to book your clean today.

What is silicone sealant?

Silicone sealants are typically used to bind two surfaces, such as plastic, metal and glass, together. It is often used in bathrooms, particularly around the shower, bath and sinks to prevent water from reaching the fixtures. Once dry, the rubbery consistency and constant exposure to moisture makes it the perfect breeding ground for black mould. Over time, the build-up of this mould on the white sealant can become difficult to remove and leave stains.

What causes black mould to grow on silicone sealant?

It is common for black mould to grow in the bathroom due to the damp and warm environment created from the bath and shower. This creates a perfect breeding ground for black mould spores and, if left untreated, can continue to spread due to the amount of moisture and condensation in the air.

Top tip: always use exhaust fans when showering to improve ventilation and reduce moisture in the air

How to remove black mould from silicone sealant

Things you'll need:

Natural white vinegar
Baking soda
A stiff brush (or an old toothbrush)
Toilet paper
Soft cloths

Create a paste

Mix one cup of white vinegar with three tablespoons of baking soda until a thick paste is created. Use a stiff brush to apply this paste onto the black mould on the silicone sealant, ensuring that the mould is covered with a thick layer. Leave to work on the mould for at least one hour.

Scrub

Use the stiff brush to scrub away the paste, taking care to not catch the edges and damage the sealant. Wipe away with a damp, soft cloth.

Soak

Place sheets of toilet paper on any remaining black mould spores, making sure that the spores are fully covered. Spray white vinegar onto the toilet paper sheet until damp and leave to soak for at least twenty minutes. The white vinegar will act as a powerful natural disinfectant to kill the mould spores and prevent it from growing back.

Remove any vinegar residue with a wet cloth before wiping dry.

Ditch the harmful chemicals such as bleach and discover more ways to naturally clean your property on our blog.

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