Silicone sealant keeps water out of your tile gaps. It’s a rubbery shield for showers and sinks. That is the theory anyway. In practice it is a double-edged sword because that same moisture loving sealant becomes a playground for mould.
Bathrooms and kitchens are damp. They are also small. Corners hide everything. Air doesn’t circulate well so the humidity just sits there. Weeks turn into months. The mould gets thicker. Removing it becomes harder. Most people reach for chemicals immediately.
You don’t have to.
“Apply it generously… making sure it’s fully saturated.” — Emma Mannion
Grab white vinegar. You likely already own a bottle. It lives in the back of your cupboard. Spray the mouldy sealant generously. Don’t be shy about the amount. Let it sit for an hour. Or longer. Give it time. The acidity penetrates the silicone. It attacks the root of the problem not just the ugly black spots on the surface. Bleach can’t do that. Bleach only scrubs the surface while spores remain buried inside waiting.
Scrub the area with an old toothbrush. Wipe it away. Dry it thoroughly. Wear a mask if you can. Dislodged spores irritate the eyes and throat.
Vinegar is antifungal. It stops regrowth without the harsh smell of bleach. And it won’t disc your sealant so you won’t need to replace the strip.
Is the smell too pungent? Try something gentler. There is a sorrento lemon scented option (Miniml Eco, £8.95 on Amazon) that doesn’t assault the nostrils quite as much.
Stubborn spots still clinging on?
Make a paste. Mix bicarbonate of soda with water. Smear it on the bad patches. Scrub again. Repeat with vinegar. Rinse well. Dry completely. Kelly Moore suggests this approach when vinegar alone isn’t enough.
Prevention is better than cure. Always.
Keep a dry cloth in the bathroom. Wipe down sealant edges after every shower. Or every sink use. A quick wipe with kitchen roll changes the game. Reduce the moisture.
“The most effective prevention is reducing how bad the moisture lingers on the seal in the first place.”
Use a squeegee on the glass after bathing (like this MR.SIGA one for £12.99). Run the extractor fan. Open a window if you dare. Get a non-electric dehumidi fier if the room stays wet. A weekly mist of vinegar along the seams helps too.
If the silicone is cracked or old? Peel it out. Throw it away. Put new anti-mould silicone in like the Dryzone white strip (£7.95 on Amazon). It is a simple DIY task. No degree required.
Why bother with bleach at all. Nature did a better job.
