Has the silicone around the bath yellowed, cracked, or grown black mould underneath? That is a sign it needs replacing, not just cleaning. The old silicone is removed completely, the surface is treated against mould, and a fresh mould-resistant sanitary silicone is applied. A new silicone joint again protects against leaks to the neighbours below and moisture in the wall. Below is how we do it and how to prepare the bathroom.
How much silicone replacement costs and what affects the price
The price depends on the joint length (just the bath or the whole enclosure), access, and whether thick, heavily mouldy silicone has to be removed. Replacing one joint at the bath is cheaper than sealing the whole enclosure and sink. Current rates are in the table below — we quote upfront and you pay after the job. Material (sanitary silicone) is charged separately or you provide your own.
How the silicone replacement visit works
- Removing the old silicone completely with a knife and scraper, without scratching the tiles.
- Thoroughly cleaning and degreasing the joint, removing mould residue.
- Drying the area — silicone will not hold on a damp surface.
- Masking the edges with tape for an even, straight joint.
- Applying the new sanitary silicone and smoothing the joint.
- Removing the tape and checking the corners for a tight seal.
Common mistakes (and how to avoid them)
- Applying new silicone over the old one — it does not hold and peels again.
- Skipping mould treatment — mould returns under the fresh joint within weeks.
- Using ordinary silicone instead of sanitary silicone with an anti-mould additive.
- Bathing or showering before the silicone has fully cured (usually 24 hours).
- Applying onto a damp grout line — the joint does not bond and leaks.
- A too-thick, uneven joint where dirt collects.
What to prepare before the technician arrives
- Clear the bath, tray and shelves of toiletries and towels.
- Provide access to all edges to be sealed.
- If buying the material yourself, choose sanitary bathroom silicone.
- Ventilate the bathroom — a dry surface holds silicone best.
- Do not bathe or shower right before the visit — the edge must be dry.
- Point out where mould or leaks appear.
- Allow 30–60 minutes depending on the joint length.
- Plan a few hours without using the bath after replacement (curing time).
A case from Warsaw — Wola, black mould at the bath
A client in Wola reported black spots in the corner between the bath and the tiles. She had tried cleaning the joint several times, but the mould kept coming back.
We removed the old silicone completely, treated against mould and dried the joint, then applied new sanitary silicone along tape. The joint came out even and white.
After 24 hours of curing the edge was fully sealed, with no trace of mould. The visit took about 40 minutes. The takeaway: with black mould, cleaning does not help — the silicone must be fully replaced with mould treatment.
Frequently asked questions
Is cleaning the old silicone enough?
If there is black mould under the joint, cleaning will not help — the old silicone must be removed and new applied with mould treatment.
How long does new silicone take to dry?
Usually about 24 hours to fully cure. During that time it is best not to use the bath or shower.
What silicone do you use?
Sanitary silicone with an anti-mould additive, made for bathrooms. We also match the colour to the grout.
Will you replace silicone at the enclosure and sink?
Yes, we seal the bath, tray, enclosure, sink and worktop — anywhere the joint meets water.
Will you remove mould under the joint?
Yes, mould treatment is a standard step — without it mould would return under the new silicone.
Should I buy the silicone myself?
You can, but we can bring suitable sanitary silicone — just note it when you book.
Will you scratch the tiles during removal?
No, we use tools that remove silicone without damaging the tiles.
How long does replacement take?
One joint takes 30–60 minutes. A whole enclosure with several edges takes longer.
Do you cover Praga, Ursynów, Białołęka?
Yes, we serve all of Warsaw and the surrounding area.
Do you issue an invoice?
Yes, we issue a VAT invoice on request.
Who does the work and how we work
Silicone replacement is carried out by HandyMan24 technicians experienced in bathroom work. We remove the old silicone without damaging the tiles, treat against mould and apply an even sanitary joint. We arrive at the agreed time, quote upfront, work cleanly and tidy up. Payment after the job, no deposits.
Has the bath silicone yellowed or grown mould? Leave a request online — we will replace it with fresh sanitary silicone in a single visit.