Silicone seals the joints in bathrooms, laundries and kitchens where water would otherwise get in: around shower bases, baths, basins, benchtops and the corners of tiled walls. It does not last forever. Here is how to tell when it needs replacing.

Signs silicone has failed

• Black mould that will not clean off. Mould grows into the silicone itself. Surface cleaning may lighten it but it comes back.
• Gaps and peeling. Silicone that has lifted from the tile or the base lets water in behind.
• Cracking or hardening. Old silicone can become hard and brittle.
• Discolouration. Yellow or brown silicone is often old.
• Water marks outside the shower or damp skirting near a wet area can mean water is getting past a seal. A leak can also come from plumbing, which needs a plumber.

Why it matters

Water that gets behind a seal can damage plaster, timber framing, cupboards and floors. Replacing silicone early is much simpler than repairing water damage.

What proper replacement involves

1. Removing all the old silicone, not just covering it.

2. Cleaning the joint and removing mould and soap residue.

3. Letting the joint dry fully.

4. Applying a mould-resistant sanitary silicone in a neat, consistent bead.

5. Leaving it to cure before the shower or bath is used.

Putting new silicone over old silicone usually fails quickly because it does not bond well.

How often?

It depends on use, ventilation and cleaning. Check silicone every few months and replace it when you see the signs above.

Keeping silicone longer

• Run the exhaust fan during and after showers.
• Squeegee or wipe down after use.
• Clean regularly with a gentle bathroom cleaner.

How we can help

See silicone and caulking and tiling and regrouting, or get a free quote.