Shower bead
The most common contaminated joint, especially at the tray front and the screen channel.
Anti-mould silicone application
Anti-mould silicone application cuts out a mouldy bead and replaces it with sanitary silicone for showers and baths. Book it when the black growth is inside the silicone. Wiping the surface is a different task and leaves the failed joint in place. Send a photo on the quote form, or WhatsApp the same details.
Who it is for
Who books an anti-mould reseal
Anyone who cleans the shower bead and sees the black return within weeks. Households worried about a dirty joint rather than a stain on the tile face. The visit uses sanitary silicone with a mould inhibitor. It is not a claim that mould can never mark a bathroom that stays wet and unventilated.
Variants
The fittings this page covers
Bath rim
The tap-end corner where steam and soap sit.
Basin and worktop edge
A short joint that still needs a full cut-out if the mould is through it.
Tile corner
Vertical silicone in an internal corner, when that was the original finish.
Scope
Included, and the jobs we will not call a reseal
Included in the visit
- Confirmation the mould is in the silicone, not only on the tile glaze
- Full cut-out of the contaminated bead
- Sanitary silicone with a mould inhibitor, tooled smooth
- Cure-time and ventilation notes
Outside this visit
- Mould inside plaster, grout beds, or behind tiles
- Treating condensation on cold walls
- Painting over a bead with stain block
- A guarantee that a wet, closed room will never mark again
How it is done
On the day
- 1
Bead or surface
If the black wipes off the glaze only, say so. If it is in the silicone, it is cut out.
- 2
Remove it all
Leaving a skin of old silicone gives the new bead nothing sound to hold, and the mould remains.
- 3
Apply sanitary silicone
The joint is dried and filled with sanitary silicone, then tooled.
- 4
Ventilate and wait
Keep water off the new bead for 24 hours. That is the minimum cure before a shower, bath, or basin is used again. A fan or an open window after that helps the inhibitor do its job.
Symptoms
What you can see before you book
Black returns after cleaning
The mould is in the body of the silicone. Surface cleaner cannot finish the job.
Pink or grey film
A surface film on a sound bead may only need cleaning. A split bead needs replacement.
Soft plaster beside the joint
That is water behind the tile. Silicone on the face does not dry the plaster.
Quote
What changes the price
The job is quoted. These are the factors, not a menu of fixed prices.
How far the mould goes
One corner is less than every wet joint in the room.
Old layers
Beads laid over beads take longer to clear.
Product
The quote is for sanitary silicone, not decorator’s caulk and not a supermarket kitchen-and-bath blend used on wood.
After the visit
Prep, cure, and how long it lasts
Do not bleach the new bead during the first day. After cure, wipe the joint dry and ventilate the room. Bleach on silicone, used constantly, can mark the surface even when the inhibitor is in the product.
Sanitary silicone resists mould better than decorator’s caulk. It still fails if the room never dries or the joint stays under a pool of water. Expect to renew a shower bead when it splits or stains through, often after several years in a ventilated room, sooner in a windowless one.
DIY
When a tube is the wrong tool
A mould spray is the DIY for a mark on the surface. It is the wrong tool once the bead is black through. Decorator’s caulk from a painting job has no place in a shower. It shrinks and moulds.
Questions
Questions about anti-mould silicone application
Can you remove black mould from silicone?
Yes, by cutting out the old mouldy bead and installing sanitary silicone. We do not paint over it or rely on a wipe.
What sealant do you use?
High-grade sanitary silicone made for wet areas, with a mould inhibitor. It is not decorator’s caulk and it is not a general-purpose gap filler.
Will anti-mould silicone stop mould for good?
It resists mould in the joint. A bathroom with no airflow and standing water will mark surfaces again. The bead itself should stay cleaner for longer than a contaminated one left in place.
Is grout mould the same job?
No. This visit replaces silicone joints. Mould in a grout line, or behind a tile, is not solved by a new bead on top.
How soon can water touch the new silicone?
After 24 hours. Sooner than that and the skin of the bead can mark or split.
Related work
Other joints
Areas we cover
Where this visit runs
Quote this anti-mould silicone application
Send the photo and the postcode on the form, or WhatsApp the same details. Water stays off the new bead for 24 hours.
Tell us which edge has failed
Name the room and the joint. If a ceiling below is stained, say when the water appears.