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!
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  • Bev Bev on Jan 14, 2024

    I was told by a mold remediation specialist to Never use bleach to kill mold. He said the bleach actually feeds it and you should, instead, use white distilled vinegar. spray on, leave for a few minutes, then pray off or wipe down thoroughly. The vinegar actually Kills the mold, bleach just takes the color off..You can use bleach after killing the mold with the DISTILLED white vinegar.

    • Fong-Lie Bavelaar Fong-Lie Bavelaar on Apr 30, 2024

      Reality. Done about everything what needed done, clean and re calk, also by professionals, I kept saying wall needs removed. About 22 years later, bathroom remodeling, yup, have been living all those years with black mold behind tub wall. My advice, fix it, in stead of taking expensive allergy meds.

  • Mcc Mcc on Apr 25, 2024

    They make cotton rope that you can soak with vinegar and attach with painters tape for those long stretches.