Is mold under shower sealant a serious emergency?« Back to Previous Page

Black and green mold under silicone sealant is a common issue in Dubai, particularly in windowless bathrooms like yours in Marina. While not an immediate medical emergency, it indicates a persistent moisture problem that needs addressing.

The high humidity and constant AC use create significant condensation, which gets trapped under non-breathable sealant. This mold is likely causing the musty smell and can irritate allergies or asthma. For most healthy adults, it's a nuisance; for those with respiratory conditions or weakened immune systems, the risk is higher.

You can attempt a DIY fix if the affected area is small (less than 1 square meter). Thoroughly scrape out all the old, contaminated silicone. Clean the area with a dedicated fungicidal cleaner—not just bleach—and let it dry completely with the bathroom door closed and the AC or exhaust fan running for at least 24 hours. Apply a high-quality, mold-resistant silicone to reseal.

Given the apartment setting and lack of ventilation, the underlying moisture may persist. If the mold returns quickly, the issue could be deeper within the wall. A professional inspection with moisture meters can identify the source. Companies with in-house microbiology labs can also test the mold type to confirm its hazard level, which is a prudent step for families. The key is not just cleaning what you see, but ensuring the environment isn’t allowing it to return.