Sink and Basin Resealing in London

We replace silicone sealant around basins and sinks.

4.9 stars, 1,000+ reviews | Fixed Price £70+VAT | Fully Supported Service | Same or Next Day Available | Mon to Sat 8am to 5pm | Book Online 24/7

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Specific arrival times. We confirm a one-hour arrival window on every booking, so there is no waiting in all day.

How much does it cost to reseal a sink or basin in London?

Resealing the silicone around a kitchen sink or bathroom basin is a fixed-price job at £70 + VAT, with white or clear silicone included in the price, so there is no hourly meter running and no surprise on the bill.

• Fixed price of £70 + VAT to reseal a kitchen sink or bathroom basin
• White or clear silicone included in the price
• Saturday appointments charged at the same weekday rate
• No separate call-out fee

A worked example: a standard inset kitchen sink reseal is £70 + VAT all in, covering removal of the old bead, cleaning and drying the joint, and laying a fresh anti-mould silicone line. The reason the job is not simply a five-minute squeeze of a tube is that most of the time is preparation: the old silicone has to be cut out cleanly with a sealant knife, every trace of the old bead and any black mould scraped and solvent-wiped away, and the surfaces left properly dry, because silicone laid over residue or damp will not bond and will lift and re-mould within months. The bead itself is then tooled in one continuous pass for a clean concave finish. Where a customer wants both a kitchen sink and a separate bathroom basin done in the same visit, the second item is quoted on booking and usually costs less than a separate call-out.

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Why London chooses Silver Saints for sink and basin resealing

Here is why over 1,000 London customers have booked Silver Saints for sink and basin resealing.

• 4.9 stars from over 1,000 Google reviews
• 5 stars on Trustpilot and Checkatrade
• £5 million public liability insurance
• Operating across London since May 2008
• All work guaranteed against faulty workmanship, with a 12-month guarantee on labour and parts we supply
• A specific one-hour arrival window confirmed on every booking

Ready to book? We can usually come today or tomorrow, subject to availability.

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What resealing a sink or basin actually involves

Resealing is not painting fresh silicone over old: a lasting job means the old bead comes out completely first. We cut the existing silicone away with a sealant knife, peel it off the joint, then scrape and solvent-clean the channel so there is no residue, no soap film and no surviving mould spores left behind. The surfaces must be bone dry before the new bead goes on, which is why we will not rush a tap that has just been used. We then lay a low-modulus, mould-resistant sanitary silicone in one continuous pass and tool it to a clean concave profile that sheds water rather than holding it. The difference between this and a quick smear is whether the seal is still watertight and mould-free in two years or peeling in two months.

Will resealing get rid of the black mould around my sink?

Black staining in old silicone is mould that has grown into the sealant itself, and once it is in the silicone it cannot be cleaned out, only cut out, which is exactly what resealing does. We remove the entire stained bead, treat and dry the joint, and replace it with a fungicidal sanitary silicone designed to resist regrowth. Where mould keeps coming back fast in the same spot, it is usually a sign of a slow leak or standing water feeding it, and because a Silver Saint is multi-trade we can check the trap and tap connections at the same time rather than just papering over the symptom.

How long before I can use the sink after resealing?

As a rule we ask customers to leave a freshly resealed sink or basin for around 24 hours before getting the joint wet, so the silicone can cure fully and bond to both surfaces. The bead is skinned over and touch-dry much sooner, but full cure through the depth of the joint is what makes it watertight, and running water across it too early is the most common reason a reseal fails. We will tell you on the day exactly when the sink is safe to use, based on the silicone used and the conditions in the room.

Sink and basin resealing across London property types

London building stock changes what we meet on a reseal. In Victorian and Edwardian terraces across Wandsworth, Hackney, Islington and Camden we often find deep ceramic Belfast sinks set into timber or stone worktops, where the joint is wide and movement between materials means a flexible low-modulus silicone is essential. In Kensington, Chelsea and Marylebone mansion-block bathrooms we frequently reseal marble or stone vanity tops, which stain if the wrong silicone or solvent is used, so material choice matters. In 1960s and 1970s flats the original stainless inset sinks sit in laminate worktops where water has often crept under a failed bead and started to swell the chipboard, which we flag. In modern new-build flats around Nine Elms, Battersea and Canary Wharf we see composite and quartz worktops with factory-style joints that need a precise, narrow bead to look right. Telling us the sink and worktop type when you book means we arrive with the correct silicone for the surface.

The expert detail that makes a reseal last

Three things separate a reseal that lasts from one that fails. First, preparation: silicone bonds to a clean dry surface and to nothing else, so any old bead, mould or soap residue left in place guarantees early failure, which is why removal and cleaning take longer than laying the new bead. Second, the right product: kitchens and bathrooms need a sanitary grade silicone with a fungicide, and stone or marble needs a neutral-cure silicone because acetic-cure (the vinegar-smelling type) can etch and stain natural stone. Third, the tooling and the gap: an over-wide or convex bead traps water and peels at the edges, so we keep the joint correctly sized and tool it concave. We also check that the sink itself is not moving: a loose inset sink or a wobbling basin will crack any sealant, so where needed we re-secure the fixing before resealing rather than sealing over a fault.

Combine it with other bathroom and kitchen jobs in one visit

Because a Silver Saint is multi-trade, a reseal is a sensible moment to clear other small kitchen or bathroom jobs in the same appointment and avoid a second call-out fee. Resealing the sink often pairs naturally with resealing baths and shower trays while we are set up for silicone work. If the reason the old seal failed was water getting underneath, it is worth combining the reseal with sourcing and curing leaks at the trap or tap. And if a dripping or worn tap is part of the problem, we can look at fitting taps on the same visit. Mention everything when you book and we will send a Saint equipped for the lot.

Sink and Basin Resealing FAQs

Can you reseal my sink or basin today in London?

Silver Saints usually offer same-day or next-day sink and basin resealing appointments across London, subject to availability, and you can call 0207 0999 199 or book online to secure the earliest slot.

How much does it cost to reseal a sink or basin?

Silver Saints reseal a kitchen sink or bathroom basin for a fixed price of £70 + VAT with white or clear silicone included, and Saturday appointments are charged at the same weekday rate.

Will resealing remove the black mould around my sink?

Resealing removes black mould because the stained silicone is cut out completely and replaced with a fungicidal sanitary silicone, since mould that has grown into old sealant cannot be cleaned out, only removed.

How long do I need to leave the sink before using it after resealing?

A freshly resealed sink or basin should usually be left around 24 hours before the joint gets wet, so the silicone cures fully and forms a lasting watertight bond.

Do you reseal both kitchen sinks and bathroom basins?

Silver Saints reseal kitchen sinks and bathroom basins of all common types, including stainless steel inset sinks, ceramic Belfast sinks, vanity-unit basins and pedestal basins.

Can you reseal a sink set into a stone, marble or quartz worktop?

Silver Saints can reseal sinks in stone, marble, granite and quartz worktops using a neutral-cure silicone that will not etch or stain natural stone, which an acetic-cure silicone would.

Why does the silicone around my sink keep going mouldy?

Silicone around a sink keeps going mouldy when the old bead was laid over residue or damp, or when a slow leak feeds standing water, so Silver Saints remove the bead fully, dry and treat the joint, and check for leaks before resealing.

Which London areas do you cover for sink and basin resealing?

Silver Saints cover every London borough for sink and basin resealing, including Westminster, Kensington and Chelsea, Camden, Islington, Wandsworth and Hackney, plus the surrounding TW, KT, CR and BR postcode areas.

Do you guarantee resealing work?

All sink and basin resealing by Silver Saints is insured and carries a 12-month guarantee on labour and on any materials supplied.

Customer Reviews

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Sink and basin resealing in London, in short

Silver Saints provide sink and basin resealing across every London borough, removing tired, mouldy or leaking silicone and replacing it with a neat, watertight, mould-resistant bead on stainless steel inset sinks, ceramic Belfast sinks, vanity-unit and pedestal basins, set into laminate, composite, granite, quartz, marble and timber worktops, in Victorian and Edwardian terraces, period mansion blocks, converted flats, concrete builds and modern new builds, plus the TW, KT, CR and BR areas. Appointments run Monday to Saturday from 8am to 5pm with same-day and next-day slots usually available, work is delivered as a Fully Supported Service with a one-hour arrival window, the job is a fixed price of £70 + VAT with white or clear silicone included, and the team holds a 4.9-star rating from over 1,000 Google reviews. To book, call 0207 0999 199 or use https://bookings.silversaints.com.

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