How to Prevent Mold on Tub and Shower Caulk

By: Danny Lipford

I’m constantly replacing the caulk between my shower walls and floor due to mold. How can I prevent mold from forming on the caulking in my shower? -Bill

Hi Bill,

Any time you put caulking in a high moisture environment, such as in a shower or tub, the result is usually mold and mildew. One thing I always recommend is to use 100% silicone caulking in a tub or shower, rather than acrylic caulk. The caulk you use in a tub or shower should also contain a biocide to prevent mold from forming.

While several manufacturers have come out with pretty good mold resistant caulk, I’ve really been impressed with GE Silicone II* K/B Supreme.

Advantages of GE Silicone II* K/B Supreme include:

  • Cures Fast: Can be ready for use in as little as one hour and no more than eight hours (depending on temperature, humidity, and size of the bead).
  • Mold-Free: Contains a biocide that keeps the caulk mold-free for 10 years, if the caulk is cleaned regularly.
  • Waterproof: 100% silicone caulk is and remains waterproof over time.
  • Flexible: 100% silicone caulking doesn’t crack or shrink and remains flexible over time.

Good luck with your project,

Danny

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5 Comments on “How to Prevent Mold on Tub and Shower Caulk”

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  • Dave Says:
    February 8th, 2016 at 1:35 pm

    Hello. What would be the best product to repair or replace the grout joint in our ceramic tile shower where the wall meets the floor? It has a couple of spots where there is about an inch or two of grout missing.
    Thank you.


  • Official Comment:


    Ben Erickson Says:
    August 10th, 2013 at 8:09 am

    Hi Liz,
    You can find info on the product Danny used to prevent mold and mildew in his shower in the episode article for this week’s show at http://www.todayshomeowner.com/television/2013/05/12/master-bath-makeover-part-2/
    For future reference, you can find a link to to this and last week’s episode articles, as well as a link to a list of all the past episode articles on the TV section of our website by clicking on the “TV” tab in the navigation t the top of every post.



  • Liz Kuntne Says:
    August 10th, 2013 at 6:54 am

    On today’s show, 9/10/13,Danny renovated his own bathroom. When the shower was completed, he sprayed the interior with a product that prevented mildew. What is this product and where can I find it? My family just built a house and I would like to treat our showers with this product before the mildew creeps in. Thank you, Liz K.


  • Official Comment:


    Ben Erickson Says:
    July 19th, 2011 at 9:03 am

    Hi Carolyn,
    You can find the answer to your question about painting paneling in our video on How to Paint Paneling. Good luck with your project!



  • carolyn Says:
    July 10th, 2011 at 2:08 am

    how can i paint over paneling


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