How to Remove Mold From Shower Caulking

How to Remove Mold From Shower Caulking? We’ve collected some potent home remedies that’ll surely do the job in no time without using any expensive products!

What Is Caulk?

How to Remove Mold From Shower Caulking1

Caulk, also known as caulking, is a flexible, waterproof sealing substance used as a sealant to fill the gap or joints around the edge of windows, tub, showers, pipes, doors, and plumbing to stop water, bugs or air from entering your home.

How to Remove Mold From Shower Caulking?

Try out some of the best ways to remove mold from shower caulk, which are described below!

1. Use Bleach

How to Remove Mold From Shower Caulking2

Bleach has an active ingredient named ‘Sodium hypochlorite’ works as a disinfectant, making it an ideal home remedy to remove mold, mildew, and stains from the caulking. It works by reacting with water or other inactive ingredients.


Add one cup of chlorinated bleach along with 1/4 gallon of water into a bowl and stir them well. Empty the resultant solution into an empty spray bottle. Spritz it onto the mold affected caulkings and spread the solution using cotton balls. Now, scrub it with an old paintbrush for a few minutes to get mold-free caulking.

2. Try Combination of Baking Soda and Bleach

Bleach alone has the capability of removing mold from the shower caulking. But if it doesn’t, then try the combination of sodium bicarbonate and bleach to eliminate the mildew instantly. As the baking soda is mildly abrasive, it lifts the dirt, grease, and fungus from the caulkings.


Combine 1 cup of chlorine bleach with 1/2 cup of baking soda into a mixing bowl to make a lump-free paste. Now apply a coating of this mixture on the mold and let it sit for a couple of hours. After that, wipe it out using water. Redo the process, until the mold is gone.

3. Try White Vinegar and Sodium Bicarbonate

Baking soda and vinegar

The combination of white distilled vinegar and baking soda is the robust, go-to solution to remove the mold and mildew. This method works because white vinegar has acetic acid, and baking soda is mildly abrasive. Furthermore, you also use it to remove mildew from the carpet.


Pour one cup of white vinegar and four tablespoons of baking soda into a bowl and combine them well. Now, apply the paste on the mold affected shower caulkings. Leave it for 5-10 minutes, then rinse it off with lots of water or a damp rag.

4. Use Hydrogen Peroxide

If the above remedies do not work, then try hydrogen peroxide as it will surely do the job. Hydrogen peroxide is effective because of its anti-fungal and anti-bacterial properties. While using the below remedy, wear hand gloves to avoid any mishaps.


Fill 3% hydrogen peroxide into an empty spray bottle. Now spray it on the mold and leave it for 5-10 minutes. Then scrub the mixture using an old paintbrush, until the shower caulking looks clean.

5. Try Borax


Borax is an excellent mold killer because of its anti-fungal qualities. Unlike other mildew removing products, it does not release toxic gases. As borax is alkaline, meaning it has a ph level of 9.13, it’s highly useful to kill the fungus. Furthermore, the borax powder is used to eliminate ants, cockroaches, and fleas.


Mix 1/4 cup of borax powder along with 4 cups of water into a large bowl and stir them well. Soak a sponge into the solution and saturate the mold affected shower caulking area. Now, rub it using a stiff-bristle brush.

Preventing Mold in Shower Caulking

Mold can cause a variety of issues such as nasal congestion, eye inflammation, cough, and throat sensitivity. That’s why it becomes necessary to prevent the arrival of mold in shower caulking. You can take below preventive methods to prevent the mold from appearing:

  • Use a Dehumidifier
  • Keep the Shower Area Dry
  • Remove Wet Towels
  • Dry the Shower Stall
  • Use Ventilation Fan
  • Stop Water leakage

By trying the above quick hacks, you’ll be able to eradicate molds from the shower caulkings efficiently. But if the previously listed remedies don’t respond, then replacing caulk is the final choice.

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