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How to Get Rid of Black Mold in Your Shower (with Video)

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Mold loves moisture and dark places, and the bathroom is the perfect place for all kinds of mold to grow and thrive. In the shower, black mold is commonly found on the grout or tiles, and it's not just unsightly, but it's also bad for your health.

The most effective way to remove mold from growing in your bathroom is with bleach and baking soda, which kills the mold spores and cleans the mold away. This guide will show you how to get rid of black mold and keep it away for good.

Black mold on silicone in shower

What is Black Mold?

Mold is a type of fungus that can grow where there's excess moisture, lack of sunlight, and minimal ventilation. There's a variety of mold types that come in different colors, textures and require a variety of growing conditions. Some are commonly referred to as black mold.

Black mold is possibly the most common mold found in American households and bathrooms, but surprisingly there's actually no such thing as black mold. Rather, the term is often used when discussing a variety of different types of mold that are black.

The most common household mold in the United States is Stachybotys chartarum (S. chartarum), and is what many people find growing in their bathrooms. Stachybotrys chartarum is a dangerous mold variety which can pose a serious health risk to people who ingest and inhale the mycotoxins it produces.

If you have this type of black mold in your home or bathroom, it should be dealt with as soon as possible. 

Black mold growing behind sealant strip in bathtub

Why is Black Mold Growing in My Shower?

You may have noticed black spots of mold growing in your shower or bathtub. Admittedly, this is not what you want to see and it may make your skin crawl when you realize you have black mold! 

The truth is, this type of black mold can grow anywhere, but it's especially fond of the conditions in the average bathroom. Most types of molds require a few things to thrive, including moisture, a lack of air or ventilation, and the lack of direct sunlight. All of which are commonly found in showers.

Taking fast action to get rid of mold in your shower will reduce the time it has to spread, and therefore make it easier to remove. Plus, the sooner you get rid of the mold the less exposure your family will have to the health risks.

Sponge in brush in shower with black mold growing in silicone

How to Remove Black Mold from the Shower

Although the CDC recommends cleaning mold on hard surfaces with soap and water or a diluted bleach solution, this isn't super effective for mold in the shower. This is because showers are frequently installed with white silicone to provide a waterproof seal between surfaces.

Unfortunately, the silicone can be a breading ground for mold. But the good news is you can kill the mold on the silicone relatively easily and inexpensively.

If you don't own a respirator, we highly recommend purchasing one for this project. They're reasonably priced and something that you can use for many different projects in the future.

Tools and Equipment

  • Bleach
  • Baking Soda
  • Plastic Wrap
Spoonful of baking soda being dumped into mixing bowl with bleach

Step One - Mix Solution

  • Put on your respirator, and it's a good idea to wear rubber gloves too.
  • In your mixing bowl, mix baking soda and bleach to form a wet paste. Be careful not to use too much bleach.
  • Add soda until the consistency of the paste is spreadable.
Spreading bleach and baking soda with a brush on black mold in shower

Step Two - Apply Solution

  • Generously spread the baking soda-bleach paste over the moldy silicone sealant using a small brush. A small paint brush, or cleaning brush, or even an old tooth brush will work.
  • Don't worry about applying too much of the soda-bleach paste on the silicone, the more the better.
Covering silicone with plastic wrap

Step Three - Cover with Plastic Wrap

  • Cover the silicone with strips of plastic wrap. This will prevent the bleach from evaporating too quickly. 
  • Wait for one hour.
  • If the silicone is still moldy, use a spray bottle with bleach to spray the area above the plastic wrap. The bleach will travel down the wall and land on the silicone.
  • Let it sit for another hour. Repeat if necessary.
Before and After Picture of Getting Rid of Mold in Shower

Step Four - Clean Area

  • Once you're pleased with your results, remove the plastic from the silicone.
  • Rinse the walls and silicone with a shower head or water from a spray bottle.
  • You're finished!

Watch the Video

How to Prevent Mold Growth

Bathrooms are particularly prone to mold growth because of the moist environment. They also often don't have windows, so they tend to be darker than other rooms in your home. 

But bathrooms are not the only part of your home where mold can grow, and taking precautions throughout your house is an important step in keeping your living space free from mold. Here are some tips to prevent mold growth in your home:

  • Ensure that your kitchen and bathroom fans vent outside, as well as the clothes dryer.
  • Repair plumbing and roof leaks as soon as possible to eliminate moisture. After the repair, frequently inspect the area for mold growth and take quick action at the first signs of mold.
  • Your home's humidity level should be no higher than 50%. You can run an air conditioner or dehumidifier to help reduce the humidity level when needed. Purchasing a humidity meter will allow you to easily and inexpensively check your household humidity level, so you'll know when you need to take action.  
  • Use mold-killing products when cleaning your bathrooms.
  • Apply a mold killing primer, such as the Kilz Mold & Mildew Interior/Exterior Primer to your walls when painting. These types of mold inhibitors won't kill existing mold, but they'll prevent mold from growing in the first place.
  • If your house has flooded, be sure to clean up and dry out the area within 24 to 48 hours. It's often best to hire a service to handle this task as they'll have the equipment and knowledge to get the job done quickly and efficiently.
  • Do not use carpet in locations that have a lot of moisture, such as bathrooms and basements.
ThermoPro TP50 Digital Hygrometer Indoor Thermometer Room Thermometer and Humidity Gauge with Temperature Monitor
  • Air Comfort Indicator: This humidity meter with humidity level icon indicates air conditions - DRY/COMFORT/WET, allowing this humidity sensor to ensure you’re always aware of changes to your home/household with just a quick glance
  • High Accuracy & Quick Refresh Rate: This inside thermometer features a high accuracy of ±2–3%RH and ±1°F, making it ideal for measuring fluctuating readings like those found in a greenhouse; Data measurements are updated every 10 seconds to give you the latest updates on your environment
  • High & Low Records: This hygrometer digital thermometer displays high/low temperature and humidity levels to allow you to make proper comparisons using your home’s data
  • Healthier Home & Environment: This thermometer hygrometer with temperature and humidity monitor ensures proper indoor humidity that achieves important health benefits for skin and allergen; Can also serve as a refrigerator thermometer, freezer thermometer, reptile thermometer, soil thermometer, humidor hygrometer, cigar hygrometer, and more
  • Practical Design: This indoor room thermometer features a tabletop stand and a magnetic back, place the temperature monitor on your counter or fridge; °F/°C selector; Powered by an AAA battery (included)

Last update on 2024-03-01 / Affiliate links / Images from Amazon Product Advertising API

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