Urgent mold under shower sealant: DIY or call professional?« Back to Previous Page

That black and green mold under the silicone is a common issue in Dubai bathrooms due to the high humidity and condensation from air conditioning. The urgency depends on the extent. If it's only on the surface of the sealant and a small area, a DIY approach may be sufficient.

For a small, visible patch, carefully remove all the old silicone sealant. Clean the area thoroughly with a dedicated mold remover or a solution of white vinegar or diluted bleach. Let the area dry completely for at least 24 hours—use a fan to help—before applying a high-quality, mold-resistant silicone to reseal it. This addresses the surface problem.

However, if the mold has penetrated behind the sealant, is widespread, or if you have a persistent musty smell, it's a strong indicator of a larger hidden problem. In JVC apartments, moisture can easily get behind tiles from a poorly sealed shower, leading to mold growth in the wall cavity. This is not a DIY fix.

A professional inspection is recommended in this case. They use moisture meters and borescopes to see behind walls without damage. The goal is to identify the moisture source—often a failed grout line or plumbing leak—and assess the full extent. Remediation then involves removing affected materials, treating the area, and fixing the root cause to prevent immediate recurrence. For verification, a post-remediation test from an independent lab can confirm the space is back to a healthy baseline.