Urgent to remove black mold under bathtub sealant?« Back to Previous Page

Yes, this is urgent. The black mold under silicone sealant indicates a moisture problem that has been ongoing, not just surface condensation. In Dubai's high humidity, this hidden moisture allows mold to colonize the wall cavity behind the tiles, which is a serious structural and health concern.

You should alert your landlord immediately. Under Dubai rental regulations, the property owner is responsible for maintaining the structural integrity of the unit, which includes addressing leaks and the resultant mold damage that compromises it. Document the issue with clear photos and send a written notification, as this creates a paper trail.

Do not attempt to remove it yourself. Scrubbing visible mold often aerosolizes spores, spreading the problem to other rooms. A professional inspection is needed to identify the moisture source—often a failed grout line, cracked pipe, or leaking shower valve—and assess the extent of the damage behind the tiles. The sealant and any affected materials must be properly removed and the area dried before any re-sealing occurs.

For a persistent musty smell and hidden growth, a professional assessment is strongly recommended to prevent recurrence and ensure the wall cavity is properly treated.