Why Does Mildew Grow on Silicone?

Silicone sealant in showers provides a perfect environment for mildew:

  • Constant moisture from water usage.
  • Limited airflow, which traps humidity.
  • Soap residue and other organic matter that provide food for mildew.

Materials You’ll Need

To tackle mildew effectively, gather the following:

  • White vinegar or hydrogen peroxide
  • Baking soda
  • Old toothbrush or scrubbing brush
  • Cotton pads or paper towels
  • Plastic scraper (optional)
  • Gloves for protection
  • A spray bottle
  • Mildew-resistant silicone (if replacement is needed)

Step-by-Step Guide

1. Identify the Extent of the Mildew

Examine the silicone to determine how deeply the mildew has penetrated. Surface-level mildew is easier to remove, while mildew embedded in the sealant might require replacement.

2. Use Vinegar or Hydrogen Peroxide

  • Fill a spray bottle with white vinegar or hydrogen peroxide (do not mix the two).
  • Spray generously on the affected areas.
  • Allow it to sit for 15–20 minutes to break down the mildew.

3. Scrub the Silicone

  • Use an old toothbrush to scrub the silicone.
  • Focus on the black or discolored spots to lift the mildew.
  • If needed, mix baking soda with a small amount of water to form a paste and use it as a gentle abrasive.

4. Apply a Soaking Method for Stubborn Mildew

  • For mildew that doesn’t come off with scrubbing, soak the area:
    • Dampen cotton pads or paper towels with vinegar or hydrogen peroxide.
    • Press them firmly onto the silicone and leave them for 1–2 hours.
    • Remove the pads and rinse the area.

5. Rinse and Dry Thoroughly

  • Use warm water to rinse away any residue.
  • Dry the silicone with a clean towel to remove excess moisture.

What If the Mildew Persists?

If the mildew has penetrated deeply into the silicone and won’t come out with cleaning, consider these steps:

1. Remove the Old Silicone

  • Use a plastic scraper to gently remove the damaged silicone. Be careful not to damage the tiles or surfaces around it.
  • Clean the exposed area thoroughly with vinegar or a specialized cleaner to eliminate any remaining mildew spores.

2. Apply New Mildew-Resistant Silicone

  • Ensure the area is completely dry.
  • Apply a fresh layer of mildew-resistant silicone, following the manufacturer’s instructions.
  • Smooth it with a tool or your finger dipped in soapy water for a neat finish.

Preventing Future Mildew Growth

Once your shower is clean, take steps to prevent mildew from returning:

1. Improve Ventilation

  • Use an exhaust fan or open a window to reduce humidity after showers.
  • Keep the bathroom door open to encourage airflow.

2. Wipe Down After Each Use

  • Use a squeegee or towel to remove excess water from the silicone and tiles.

3. Regular Cleaning

  • Spray vinegar or a mild cleaning solution on the silicone weekly.
  • Rinse and dry thoroughly to prevent mildew buildup.

4. Use a Mildew-Resistant Sealant

  • Invest in silicone sealants specifically designed to resist mildew growth.

Conclusion

Getting rid of mildew on shower silicone doesn’t have to be a lengthy or difficult process. With natural cleaning solutions like vinegar or hydrogen peroxide and regular maintenance, you can keep your bathroom mildew-free and fresh. For deeply ingrained mildew, replacing the silicone provides a long-term solution. Follow these tips to enjoy a cleaner, healthier shower space!

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