How to Remove Mould off Bathroom Sealant | DIY Guide

Remove Mould off Bathroom Sealant
(The Easy Step by Step Guide)

Bathroom sealant is applied along the length of sinks and showers to prevent water from reaching the fixture. Since it has a rubbery surface, silicone sealant is a breeding ground for mould.

Thankfully, learning how to remove mould from silicone is not hard as you just need some non-toxic household cleaning liquids.

Fortunately, you can choose from a list of methods to remove mould in shower silicone. Let’s discuss some of them in detail.

How to Remove Mould of Bathroom Silicone Sealant?

What You'll


Below you’ll find 3 simple to follow steps that ‘walk’ you through the Remove Mould off Bathroom Silicone Sealant (with no experience or special skills required).

How to Clean Mould off Bathroom Sealant?

Mould grows in the sealant because it is often damp, providing a suitable habitat. Not only does mould cause skin infections on physical contact, but it also ruins the appearance of your bathroom.

Before you start cleaning shower mould, make sure that you have all the supplies, and you’re wearing gloves because harsh cleaning liquids can harm your skin.

We will discuss three methods of cleaning the silicone sealant below.

Method 1: Using Ammonia

When inhaled, ammonia can be toxic, so make sure that the bathroom is ventilated. Open all the doors and windows to get the air circulating.

If your bathroom is not well-ventilated, wear a respirator to stay safe from ammonia fumes. Once you are prepared, gather the following supplies:

  • Ammonia
  • Water
  • Spray bottle
  • Funnel
  • Old toothbrush

In a container, add equal parts of ammonia and water. Mix the solution with a stirrer. Then, put the funnel on the spray bottle and carefully pour the mixture into it.

Squirt the mixture onto the sealant and let it settle in. The mixture will take 15 to 20 minutes to start killing the mould.

Now, use the brush to scrape off the mould from the bathroom silicone. Make sure that you’ve gotten every bit of the mould so that there is no chance of its regrowth.

Wipe the surface clean with a paper towel or rag. Typically, ammonia is a potent fungus-killer, but sometimes, it might not prove to be effective in just one application.

In that case, repeat the process to remove the mould completely.

Method 2: Using Bleach

When working with bleach, take the same precautions as you would with ammonia. Ammonia and bleach work in pretty much the same way, so if one has not proved effective in removing mould, the other won’t do much either. Only use bleach if ammonia is not available.

Here are the things you need for this method:

  • Chlorinated bleach
  • Water
  • Sponge
  • Toothbrush

Mix 1 cup of chlorinated bleach in 3.75 litres of water evenly to form a solution. Then, take a sponge and dip it in the solution.

If the mould in the shower has not reached deep within, you’d be able to take it out with light scrubbing. However, if this is not working, pour the solution into a spray bottle. Spray an even amount of the solution onto the mould and let it seep in for 15 minutes.

Then, go in with a brush and scrub until you’ve removed all the mould.

Sometimes, the mould is stubborn as its roots have penetrated the sealant. If this is the case, dip some cotton coils in the bleach solution but do not wring them.

Place the coils wherever you can see the mould and let them stay overnight. Use Q-tips or a pointy object to keep them in place. In the morning, remove the cotton coils and scrub the solution off the sealant. The mould will come along too.

Once the sealant is clean, spray the bleach-water solution on it and wipe it clean with a towel. This will prevent future growth of mould.

Method 3: Baking Soda and Vinegar

If you are a DIY enthusiast, you’d know that baking soda is not just for baking but does wonders as a cleaning agent. You need the following materials for this method:

  • Baking soda
  • Vinegar
  • Dishrag
  • Brush

Take a cup of white vinegar and keep adding baking soda until thick paste forms. Scoop a tablespoon of this paste and put it on a rag. Apply this to the mould on the shower sealant and let the paste stay there for 5 to 10 minutes.

This will give the vinegar and baking soda time to break down the mould. 

After this, use a brush to remove mould from the shower sealant. This method will work if the mould is still soft and has not yet formed roots.

If this method alone does not work, you can combine it with ammonia or bleach to get the desired results.

Do not use ammonia and bleach both as they have the same effect, and using both will only worsen the smell and increase fume emission.

How to Prevent Mould from Growing on Bathroom Silicone Sealant?

Now that you know how hard it is to get rid of mould in the bathroom, you might be wondering how to prevent the mould from coming back or growing in the first place.

Firstly, do not let the bathroom be damp. Keep your shower curtains and towels dry as damp places are mould magnets.

If you have plants in your bathroom, keep them away from the silicone sealant and make sure that when you water them without making other surfaces wet.

Certain plants purify the air of mould. Putting them in your bathroom is an effective way to keep fungus at bay. After showering, open the bathroom window, allowing humid air to escape.

Alternatively, you can use a dehumidifier to keep the air dry.

Lastly, deep clean your bathroom at least once every month. Cleaning your bathroom is not exactly the most rewarding or glorious task, but doing it will:

  • Prevent mould growth
  • Increase the lifespan of your bathroom sealant

Final Words

Your bathroom is one of the most visited rooms in the house, so it is only logical that you keep it clean at all times. Invest in reliable cleaning liquids and make a habit of keeping the bathroom dry.

Hopefully, you’d have learned how to remove mould from silicone sealant, and will use these methods to keep your bathroom mould-free.