How to Get Rid of Black Mold in Your Shower Caulking

7 Materials
2 Hours
If you don't want to take the time and the expense to remove and replace your shower or bathtub caulking that is currently moldy, then this is a great way to remove the mold and mold stains that is very affordable and easy! Plus, it works amazing!
So, if you have a bathtub with caulk that looks like this, follow along!
You'll need cotton balls, gloves, water, and bleach. Eye protection and a ventilation mask also recommended.
Mix water and bleach together in a small dish, using only a little bleach. Open the window, turn on the fan, and wear gloves!

Dip a cotton ball into the bleach water and then apply the wet cotton ball directly to the caulking around your tub.
If you have moldy spots in the vertical caulking of your tub, stretch out the cotton balls a bit first before dipping them in the bleach water. Start with the highest part and then work your way down as the liquid dripping down will cause the ones below it to fall.
Let the cotton balls stay on the caulking for about 2 hours. Remove one and see if the mold is gone. If not, wait another hour.

If looks good, remove the cotton balls and dispose them in the trash.

You should now have beautiful caulking!
For more tips on using bleach and removing mold from caulking, head to my post (linked at the bottom) for all the details and to check out more of my cleaning tutorials.

And if you like smart tips like this, be sure to check out my ebook Speed Clean the Deep Clean which has more than 50 cleaning tutorials and cleaning tips for all areas of your home.
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Katelyn Fagan
Want more details about this and other DIY projects? Check out my blog post!
Frequently asked questions
Have a question about this project?
3 of 118 questions
  • M.h28054285 M.h28054285 on Oct 26, 2021

    How do you adhere the cotton balls vertically.

  • Michele ellison Michele ellison on Oct 28, 2021

    Wouldn’t it be just as easy to spray the areas with bleach and water?

  • Sha5390000 Sha5390000 on Sep 02, 2022

    How do u get mold off of bathroom ceiling??

Join the conversation
3 of 611 comments
  • Norma Baudin Norma Baudin on Feb 25, 2023

    Bleach doesn't kill black mold. It bleaches it. In order for it not to grow back, it would have to be cleaned with vinegar because will actually kill the mold. Unfortunately, the reason why the mold keeps coming back is because it's behind the shower walls. It's a constant battle trying to keep the shower clean from the mold all the while the mold is constantly growing behind the walls. Not a very healthy situation.

  • Candy Candy on Apr 30, 2023

    Looks great i love it! Except bleach doesnt get rid of mold it only covers it up. I know it sounds crazy but thats what science says.

    • LAHawk LAHawk on Jul 12, 2023

      True! it removes the stain not the mold. The mold roots are still there attached and continue to grow.