Greater London · England
Bathroom & kitchen resealing in Lewisham, Greater London
Bath, shower, basin, wet room, worktop and sink resealing in Lewisham, with a 12-month guarantee on every job. Call for a quick quote.
- Black mould in the silicone that will not clean off
- A joint torn by a bath that flexes
- Water getting behind the kitchen upstand
About our bathroom resealing in Lewisham
Sealant that’s mouldy, cracked or peeling shouldn’t be left until there’s a leak. A photo of the joints helps when you phone 0345 464 0079 or drop us an email, and you will get a clear quote before any work starts. If you have water escaping at the shower enclosure and mouldy sealant that has gone black, we can help, whatever the surface.
Much of London’s older housing is Victorian and Edwardian terraces, many of them now split into flats, and bathrooms were often squeezed into small rooms. Small, steamy rooms are where mould gets into sealant and grout fastest.
There’s a 12-month guarantee on every job.
- Where
- Lewisham (SE13, SE8, SE6)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What the job involves on each surface
Shower trays & enclosures
Water often gets past the wall profile of a shower enclosure. We reseal it along with the base of the enclosure, sealing the side the enclosure’s instructions call for.
Sinks & splashbacks
Water getting under the rim of an inset sink can soak the worktop. We reseal the visible edge of the sink where it has failed.
How the visit works
When we arrive, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before any work begins. Most jobs take a morning or an afternoon for most single baths and showers. In Lewisham, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- First the area is protected and every bit of old sealant removed, including the film left on the tiles.
- We clean and degrease the joint and treat any mould.
- The joint is left to dry, and baths are filled with water first.
- We apply anti-fungal sanitary silicone in one even bead and tool it neatly.
- We clear away and tell you when it can get wet, normally after around 24 hours.
Preparing for the visit
- Move anything stored near the joints
- Tell us about any water getting in
- Mention any sign-in or site rules at work premises
How to get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or drop us an email.
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How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Avoid abrasive pads on the sealant
- Open a window or run the fan so the room dries
- Keep bottles off the sealant line
- Wipe the sealant dry after showering
Wipe up standing water along the worktop joint. The drier the joint stays, the longer it lasts.
Don’t wait for a refit to deal with failed sealant. Like paintwork, sealant needs renewing from time to time, and replacing it when it fails protects the rest of the room.
What we are called out for in Lewisham
Silicone needs a clean, dry surface without any grease to stick to. Traces of soap, bath oil and old sealant stop it gripping, and a joint that looked fine soon begins to come away.
Any of these means the joints need attention:
- A messy, uneven bead from a previous reseal
- Water getting behind the bath panel
- Gaps between the worktop and the wall
- Black mould in the silicone that will not clean off
Schools such as St Saviour's Catholic Primary School are buildings too, and its toilets, changing areas and kitchens need their sealant renewed like any other building’s.
Before you book anyone
- The length of the guarantee
- What the quote includes, VAT included or not
- Whether the sealant suits the joint
- How hidden problems are handled
Why deal with it now?
Fresh sealant smartens a bathroom or kitchen with very little disruption, which helps when a home is being let or put on the market. A smeared, uneven DIY bead does the opposite. In a flat in Lewisham, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Why choose Mr Mastic in Lewisham
- White, clear, grey or another colour, product permitting
- 180+ five-star Google reviews
- Neat joints and a tidy finish
- Arbo and Everbuild products
Take a look at our cost guide and what customers say.
Lewisham questions
Is parking a problem for a job in Lewisham?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
I live in a flat in Lewisham. Can a failed seal leak into the flat below?
It can, yes: water that gets past a split bead or cracked grout often runs under the tray and shows on the ceiling below. Replacing the sealant and grout before that happens is much less trouble than repairing a neighbour’s ceiling.
How long does a bath or shower reseal take?
Allow a morning or an afternoon for most single baths and showers. We will confirm how long your job needs when we quote.
Is white the only colour available?
Most people choose white or clear, and other colours are available to suit tiles, trays and worktops. Tell us what you’d like when you get in touch.
Where do you work from?
We are based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do you do kitchens as well as bathrooms?
Yes. The old sealant is cut out and the joint degreased, because cooking grease stops silicone sticking, then we reseal in a colour to suit.
Can new silicone go straight over the old?
No, and it’s one of the main reasons reseals fail. We cut out all of the old sealant, clean the joint and start again.
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Movement from a bath with loose feet or no proper support
- Damage behind the tiles that needs a tiler
- A cracked shower tray or bath (that needs repair or replacement)
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before you book.
Surfaces we seal
- Wet rooms
- Kitchen worktops & upstands
- Shower trays & enclosures
- Basins & vanity units
- Sinks & splashbacks
- Baths
What affects the quote in Lewisham
Every job gets its own quote. This is what makes a difference:
- The number of rooms or windows
- Access and height
- Any mould that needs treating
- Whether old sealant or filler has to be cut out
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- Roughly how big the job is
- Any previous sealing or DIY work
- Whether it’s a home or a business
- The address or postcode of the job
Want a quote for bathroom resealing? Please ring 0345 464 0079 or drop us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Lewisham homes and their sealant
London has hard water, so limescale builds up on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in. London has a lot of flats and conversions, and a failed shower or bath seal in one can show up on the ceiling below, so tired sealant is best dealt with early.
As a London address, Lewisham can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Letting a property close to Lewisham station? Then a reseal between tenants is a quick way to make the bathroom and kitchen look cared for.
Lewisham is about 3 miles west of Eltham, in Greater London. Whether you’re in the middle of Lewisham or further out, bathroom resealing is available for homes and businesses alike, from flats and houses to offices and hotels. Lewisham is one of 764 towns and villages in Greater London where we work for bathroom resealing.
We work across SE13, SE8 and SE6 for bathroom resealing. That includes homes and businesses on Station Road, Lewisham High Street and Lewis Grove. With the B220 close by, Lewisham is simple for us to get to. If you’re just outside Lewisham, we cover Ladywell (1 mile south-west), St Johns (1 mile north-west), Hither Green (1 mile south-east), Blackheath (1 mile north-east) and Lee (1 mile south-east). Within a short drive, we also cover London (4 miles north-west), City of Westminster (7 miles north-west), Marylebone (7 miles north-west), Kensington (9 miles west), St Pancras (6 miles north-west) and Shoreditch (5 miles north-west).
Landmarks near Lewisham
Typical jobs here are in homes near St Joseph's Academy, Ladywell Fields and The Watch House. There’s a railway station in Lewisham itself: Lewisham station. Nearby you will also find Greenwich Castle (1.2 miles north) and Fan Museum (1.2 miles north). Green spaces nearby include Knight's Hill and Brookmill Road Local Nature Reserve.