How To Remove Mold From Silicone Caulking (2 Easy Methods)

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Mildew loves spots that are a combination of warmth and moisture. Unfortunately, we have space right inside our house that’s extremely prone to this odd warm and moist climate. And it’s the washroom or bathroom.

Some kitchens are also quite suitable for mildew growth. Of course, we can’t let them grow fearlessly and so taking steps are necessary.

One universal prevention from mildew growing over shower or bathtub is using silicone caulk since the element has a beautiful ability to suck out rust like a magnet.

However, sometimes you can’t help but discover mold growing over those areas again. And if that’s the case, then following a helpful method on how to remove mildew from a silicone caulkareas is essential. We are about to do that!

What is Silicone Caulking?

Before going into the removal of mold in silicone caulking, let’s know what precisely the thing is. Basically, these are a specific type of sealant that can be used for quite a few kinds of household and professional works.

The ability to resist weather conditions, extreme temperature setting and also sources such as chemicals and water, makes it a very flexible option for both inside and outside of your house.

Recommended reading:   Best Dripless Caulking Gun [ Top 5 Picks & Buying Guide ]

How to Remove Mold from Silicone Rubber Sealant- Two Effective Methods

There are quite a few categories of the rule that implements with removing severe mold from silicone rubber sealant or any caulking. Some use caulk whitener to reverse the harmful effects simply.

Also a few prefer buying store-bought silicone caulk remover to get rid of everything, including the mold. While a few think about whether does, bleach kills mild.

To make sure you find a proper way for your concern, load-unload caulk, and how to use caulking. I’ll be providing more than one method to help. Yes, let’s do that!

Method One: Using Ammonia

Step 1:  Ventilating the Place

For this, you are going to need safe ammonia. These are pretty harmful to health. So, make sure the place you are working at has enough ventilation support.

You can simply open the windows and doors widely so that there’s enough air circulation going on. Also, turn on the fans or set up handy ones to get moving air.

Step 2:  Protection from Fumes

The airflow inside a bound space such as a bathroom is often too limited. It invites a high risk while working with ammonia. So, you should wear the right respirator before doing this job. It will help in filtering any hazardous fumes.

You can also buy a face mask if the budget is a problem. But don’t risk it all with an ugly paper mask. The best choice is ones with an activated charcoal cartridge. These are pretty rough at protecting and sealing your face away from absorbing fumes.

Step 3:  The Mixture to Use

Start by settling in a clean and properly ventilated space. Then simply take equal parts of ammonia and water. Mix them finely. Use a spray bottle to keep the mixture. It will also help with easy application.

Step 4:  Scrubbing Off

Now that you are ready with the solution, time to spay. Using a generous amount apply by spraying the solution over moldy caulk.

Let it stay that way for five to ten minutes. This time depends on how serious the cast looks. This will help to kill the mold effectively.

Once the required time of waiting is over, start scrubbing. You can use any tiny brush or toothbrush for this. Using a clean cloth or paper towel, simply wipe off any trace remaining. Make sure nothing is remaining.

Step 5:  Going for the Second Time

In a few cases, the mold won’t come off with trying just one. In such a situation, you need to try again to kill the mold. This technique should work with repeated attempts.

However, if the process does not seem to work, you need to go for a different cleaner. Also, make sure the surface is non-porous type. The solution is slightly off for porous surfaces with caulk.

Step 6:  Using Another Cleaner

You may feel mold has gone away, but that’s not necessarily the case. Sometimes even with clear looks, the shape is still present on the surface. It could just reappear after a while. If that’s the case, then ammonia is not capable of going deep into such serious mold roots.

So, you will need to try another solution.

Also read:  Dewalt 20-Volt Caulking Gun [ Review in 2020 ]

Method Two: The Bleach Formula

Step 1:  Starting Note

Bleach has a similar kind of limitation and risk of using ammonia. And so, you need to use it within the ventilated area.

Also, the method works well with non-porous surfaces. If you don’t have ammonia in hand, use bleach. It can create dangerous fumes, so be careful. Does bleach damage silicone sealant?Well, yes, the chances are present.

So be careful if you don’t mean to remove that out while getting rid of molds.

Step 2:  Cleaning Process

Use around one cup of chlorinated bleach mixed with a gallon of water. Make sure the mixture dissolves well. Get a fresh sponge and damp it with the solution. Squeeze away the excess and use this to scrub away light molds.

However, if the mold is tough, using sponge won’t help much. In such a case, fill a spray bottle with the solution. Mist the solution over spots and let it sit for five to ten minutes. Once the solution settles use sponge to wipe it down again.

You can use a cleaning brush by spraying once again if there’s still residue remaining. The solution needs some time to reach mold’s root. Use a bristled brush after letting it settle with the mold well.

Step 3:  Treating Deep Rooted Molds

If the slight effort doesn’t seem to work, go for hard ones. In such a case, use cotton coils. Let them soak thoroughly with the solution.

Now place these coils over caulk line. It needs to nudge them and so use Q-tip.

Let the caulk sink in for one night. And then you can simply scrub it away in the morning. This will should work to remove mold from caulk naturallywithout using too harsh cleaners of hard stains. These are also helpful to remove rust without harming underneath sealant.

Use a paper towel or washcloth to wipe down that area after scrubbing with the solution once again. There could be active agents still breathing on that surface. Rubbing a final time will prevent mold from growing once again.

Here’s a quick video on the whole prevention thing to help you avoid molds into prone areas.


So that was how to remove mold from silicone caulking.You see, some methods work for removing shape that stays on top of caulking. But in most cases. The removal of the cast itself is not enough. It could still be present beneath the calking. And so, it’s quite essential to remove sealant or caulking along with the mold.

You can clear out space entirely and then reseal the area. Long term damage from your priced possession like shower and bathtub, this maintenance seems quite obvious once in a while. So, don’t just sleep on it and try putting maintenance habits into your lifestyle.

So, which method did you find most suitable to try, don’t forget to let us know?

Frequently Asked Questions (FAQs)

How to avoid molds from growing?

Answer: Always keep your walls, shower, and delicate-to-water-spaces dry. Using bleach or ammonia continuously might cause discoloration. So, the best way is prevention. You can use vinegar spray regularly on surfaces prone to dust. This will clear out as well as prevent mold growth.

Is bleach safe to use?

Answer: Working with bleach is quite risky. So, don’t forget to put on your gloves and proper wears. The fabric might lose its color.

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