Banish Bathroom Blight: Bathroom Silicone Guide

Failed, cracked or mouldy silicone can quickly make an otherwise clean bathroom look tired. More importantly, once silicone starts pulling away from a bath, shower tray or tiles, water can begin getting into places it shouldn’t.

This Banish Bathroom Blight guide explains how to recognise failing bathroom silicone, when it can be cleaned and when it should be completely removed and replaced.

For homeowners who would rather have the job professionally completed, our silicone resealing service covers bathrooms, baths, showers, sinks and other moisture-prone areas across Glasgow and surrounding locations.

Banish Bathroom Blight: Why Bathroom Silicone Matters

Bathroom silicone isn’t simply there to provide a neat finish. It creates a flexible waterproof seal between surfaces where water could otherwise penetrate.

You’ll commonly find silicone around:

• Baths and bath-to-wall joints
• Shower trays
• Shower enclosures and screens
• Bathroom sinks and basins
• Vanity units and worktops
• Tile edges and corners

Unlike grout, sanitary silicone remains flexible. This allows it to cope with small amounts of movement between different surfaces.

Once that seal fails, however, water can work its way behind tiles, baths and shower trays.

Banish Bathroom Blight: Signs Your Silicone Needs Replacing

Bathroom silicone doesn’t have to be falling off the wall before it becomes a problem.

Common signs include:

• Silicone peeling away from the bath or shower tray
• Visible cracks or splits
• Gaps appearing along the seal
• Black mould embedded deeply into the silicone
• Silicone becoming brittle or hard
• Sections remaining damp behind the seal
• Water appearing outside a shower or around a bath
• Discolouration that cannot be cleaned away

If the silicone has physically separated from either surface, cleaning it won’t restore the waterproof seal. It normally needs to be removed and replaced.

Banish Bathroom Blight: Mouldy Silicone – Clean It or Replace It?

A small amount of surface mould doesn’t necessarily mean the silicone has failed.

If the silicone remains firmly attached, with no cracks or gaps, surface mould may sometimes be removed using an appropriate bathroom cleaner.

The situation changes when mould has penetrated deeply into the silicone or appears underneath it.

Banish Bathroom Blight: When Mould Keeps Coming Back

Repeated mould growth can be caused by moisture remaining around the joint, poor bathroom ventilation or silicone that has started separating from the surface.

Simply applying another layer of silicone over the affected area doesn’t solve the underlying problem.

If the existing seal has failed, the better approach is usually to remove it completely, clean and prepare the surfaces and apply a fresh sanitary silicone seal.

Banish Bathroom Blight: Can You Silicone Over Old Silicone?

It’s tempting. The old silicone looks rough, so another bead gets applied directly over the top.

Ctrl+K Open command palette

Unfortunately, this rarely produces a good long-term result.

New silicone needs a clean, dry and properly prepared surface to achieve a reliable bond. Applying it over deteriorating silicone can leave weak areas underneath the new seal.

Banish Bathroom Blight: Why Removing Old Silicone Matters

Removing the existing silicone allows the joint to be inspected before resealing.

The surfaces can then be cleaned and prepared so the replacement silicone bonds directly to the bath, shower tray, tiles or other adjoining surfaces.

This also produces a considerably cleaner finish than continually building new layers over old sealant.

Banish Bathroom Blight: Why Bathroom Silicone Starts Peeling Away

There isn’t one single reason bathroom silicone fails.

Common causes include:

• Poor surface preparation
• Applying silicone to damp surfaces
• Movement in a bath or shower tray
• Age and general deterioration
• Using an unsuitable type of sealant
• Persistent moisture
• Previous silicone residue preventing adhesion
• Excessive movement between adjoining surfaces

Finding out why the original seal failed can be just as important as replacing it.

Banish Bathroom Blight: Movement Around Baths and Shower Trays

Baths and shower trays can move slightly when weight is applied.

If there’s excessive movement, even a good silicone joint can eventually separate.

Before resealing, it’s therefore worth checking that the bath or shower tray is secure and that there isn’t an underlying problem causing excessive movement.

Banish Bathroom Blight: Preparing a Bathroom for New Silicone

Good preparation makes a substantial difference to the finished seal.

The old silicone should first be removed rather than simply covered.

Remaining residue, soap deposits and contamination then need to be cleared from the joint. The surfaces must also be properly dry before new silicone is applied.

Banish Bathroom Blight: Why Dry Surfaces Are Important

Silicone needs to adhere to the surfaces on either side of the joint.

Moisture, residue and contamination can interfere with that bond and potentially shorten the life of the new seal.

This is one reason rushing a bathroom resealing job can produce disappointing results.

Banish Bathroom Blight: Bath Silicone and Shower Silicone

Bathrooms need a sealant designed for wet environments.

Sanitary silicone is commonly used because it provides a flexible, waterproof seal and usually contains protection intended to inhibit mould growth.

It’s suitable for many of the joints found around baths, showers, basins and bathroom fittings.

Banish Bathroom Blight: Silicone Isn’t the Same as Grout

Silicone and grout perform different jobs.

Grout is generally used between tiles, while silicone is used where flexibility is required, particularly at changes of plane and where different bathroom surfaces meet.

Replacing a flexible silicone joint with ordinary grout can result in cracking when movement occurs.

Banish Bathroom Blight: How Long Before New Silicone Can Get Wet?

Fresh silicone needs sufficient time to cure before being exposed to water.

The exact curing time depends on the particular product, temperature, humidity and the size of the silicone joint, so the manufacturer’s instructions should always be followed.

Using a shower too soon can disturb the new seal before it has properly cured.

Banish Bathroom Blight: Don’t Rush the First Shower

Waiting for the silicone to cure properly is a small inconvenience compared with having to remove and replace a failed seal again.

If a bathroom has only one shower or bath, it’s worth planning the resealing work around the required curing period.

Banish Bathroom Blight: Can Failed Silicone Cause Water Damage?

Yes.

Once a waterproof joint opens up, water can potentially travel behind a bath, shower tray, tiles or surrounding finishes.

Sometimes the first visible sign isn’t the silicone itself. It might be staining, dampness, swollen materials or damage appearing nearby.

Banish Bathroom Blight: Don’t Ignore Persistent Water Around a Bath or Shower

Failed silicone is one possible source of water ingress, but it isn’t the only one.

Leaks can also originate from plumbing connections, wastes, taps, shower fittings or pipework.

If water continues appearing after a seal has been replaced, the source should be properly investigated rather than repeatedly adding more silicone.

For other small bathroom plumbing work, see our plumbing services across Glasgow.

Banish Bathroom Blight: DIY or Professional Bathroom Resealing?

Bathroom resealing looks straightforward until you’re trying to remove every trace of old silicone, prepare the joint and produce a consistent finish around awkward corners.

Smaller straightforward joints can certainly be tackled as a DIY job if you have the right tools and take your time.

Professional resealing can make more sense when:

• Several areas need resealed
• The existing silicone is badly deteriorated
• Mould is embedded throughout the seal
• Access is awkward
• Previous silicone has been applied poorly
• A clean, consistent finish is important
• You’re unsure whether the silicone is actually responsible for a leak

Banish Bathroom Blight: Professional Silicone Resealing in Glasgow

Glasgow Handyman Solutions provides professional silicone resealing services for bathrooms across Glasgow and surrounding areas.

Old and deteriorated silicone can be removed before the area is prepared and resealed to create a clean, durable and waterproof finish.

Services include resealing around baths, shower trays, shower screens, basins, sinks and other suitable bathroom joints.

We cover Glasgow City Centre, the Southside, West End and East End, as well as surrounding areas including Paisley, Renfrew, Renfrewshire, Clydebank, Bearsden, Milngavie, Rutherglen and East Kilbride.

Banish Bathroom Blight: Keep Water Where It Belongs

Bathroom silicone is a small detail doing an important job.

Checking seals periodically and dealing with cracked, peeling or failed silicone early can help prevent water getting behind bathroom fittings and finishes.

If your bathroom silicone has seen better days, Glasgow Handyman Solutions can remove the deteriorated sealant and professionally reseal the affected areas.

Contact Glasgow Handyman Solutions for a free quote for bathroom silicone resealing across Glasgow and surrounding areas.