Silicone sealing Johannesburg

A single wet area runs R400 to R900, a full bathroom R800 to R1,800, and kitchen joints R350 to R800. The price includes what matters most: stripping the old seal completely, treating any mould, and resealing with quality antifungal sanitary silicone.

Bathroom mould feeds on soap residue and moisture, and once it roots under or inside the silicone, surface cleaning can’t reach it — it always returns. The fix is full removal, antifungal treatment, and resealing with sanitary-grade silicone, plus better ventilation to slow the cycle down.

No — silicone doesn’t bond to cured silicone, so over-sealing peels and leaks within months. Professional resealing strips to bare, clean, dry surfaces first. It’s the least glamorous part of the job and the entire reason the result lasts years instead of weeks. It’s always worth getting a professional assessment for your specific setup in Johannesburg — quotes on Kandua are free.

24 hours is the safe standard for sanitary silicone to cure before water exposure — some fast-cure products shorten this, but overnight is the reliable rule. Using the shower too soon is the most common reason fresh seals fail early.

Both — the cosmetic mould is the visible half, while the cracked or lifted seal is letting water behind baths, showers, and tiles with every use. That’s how bubbling paint, soft plaster, and loose tiles start. Resealing is cheap precisely because you’re doing it before the water damage bill. For homeowners in Johannesburg, comparing a few quotes through Kandua is the quickest way to see real local pricing.