Can I remove black mold under sealant myself?« Back to Previous Page

That depends on the extent of the growth and its cause. For small, isolated spots confined to the sealant, a DIY approach can be effective. However, mold under sealant often indicates a persistent moisture issue that bleach cannot fix.

For a proper DIY attempt, start by scraping out all the old, contaminated sealant completely. Do not just bleach the surface, as the roots penetrate deep. Treat the exposed area with a dedicated mold remover, not just bleach, which only lightens the color and does not kill the roots. Let the area dry thoroughly for at least 24-48 hours—this is critical in Dubai's humidity. Use a dehumidifier or run the AC constantly to draw out moisture from the walls before applying a high-quality, mold-resistant silicone.

If the mold has spread to the drywall or tiles, reappears quickly after cleaning, or if the musty smell persists, the problem is likely deeper. In villas, a leak behind the wall from a pipe or poor waterproofing is common. In these cases, a professional inspection is needed to identify and rectify the source of moisture, as applying new sealant over an active leak will just trap the problem again.