Greater London · England
Bathroom & kitchen resealing in North Finchley, Greater London
Bath, shower, basin, wet room, worktop and sink resealing for householders, landlords and businesses in North Finchley. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- New sealant laid over old sealant that is now lifting
- A joint torn by a bath that flexes
- Leaking joints on a shower screen
Common problems we fix in North Finchley
Black mould is behind a lot of resealing. Steamy rooms that do not dry out keep the silicone damp for hours, and once it has grown into the bead, cleaning rarely gets it out.
Keep an eye out for any of the following:
- Two layers of silicone, both failing
- Shrunken sealant along the back of a worktop
- Water getting behind the bath panel
- Gaps where the bath or tray has moved
For an older house near a landmark such as St. Barnabas Church, older homes can move a little, which is hard on rigid grout and tired sealant.
Comparing quotes
- What insurance they hold
- What happens if they find a problem under the old sealant
- Is VAT in the price?
- Whether all the old sealant comes out first
How we handle bathroom resealing in North Finchley
Sealant that is mouldy, cracked or peeling is worth sorting before it lets water through. Just ring 0345 464 0079 or send us an email with a photo of the joints, and you’ll get a clear quote before any work starts. We work on wet rooms, shower trays & enclosures and baths, and common reasons people get in touch are failed sealant on the screen profile and water getting behind the kitchen upstand.
London homes include a lot of flats, conversions and mansion blocks, and many bathrooms sit right above someone else’s ceiling. That makes worn sealant and cracked grout in North Finchley more than a cosmetic job.
Big or small, it’s backed by our 12-month guarantee in North Finchley and across Greater London.
- Where
- North Finchley (N12, N20, N11)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
North Finchley homes and their sealant
London’s water is hard, 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, North Finchley can be tricky for parking: let us know about parking bays, permits or a driveway. For landlords with property near New Southgate station, fresh sealant around the bath, shower and sink between tenancies helps a property present well and keeps leaks at bay.
North Finchley is about 1 mile north of Finchley, in Greater London. From the centre of North Finchley to the outskirts, we cover bathroom resealing for every kind of property. 764 places in Greater London are on our list, from the larger towns to small villages. For nearby work, see our London page.
We work across N12, N20 and N11 for bathroom resealing. Whether your property is on High Road, Lodge Lane and Percy Road or a nearby road, we can help. With the A1000 close by, North Finchley is simple for us to get to. Other places close to North Finchley include Woodside Park (1 mile west), Oakleigh Park (1 mile north), Whetstone (1 mile north), Friern Barnet (1 mile east) and Finchley (1 mile south). Within a short drive, we also cover London (9 miles south-east), City of Westminster (7 miles south), Marylebone (7 miles south), Kensington (8 miles south), St Pancras (7 miles south) and Shoreditch (8 miles south-east).
Near you in North Finchley
Locally, jobs take us to homes and businesses close to Friary Park, Woodhouse College and The Bohemia pub and the streets around them. You will also find Francis Skaryna Belarusian Library and Museum (0.5 miles west) and St Michael's Catholic Grammar School (within half a mile south-west). The nearest railway station is New Southgate station, about 1.4 miles east of the centre. Nearby you’ll also find Finchley Memorial Hospital (0.8 miles south) and Francis Skaryna Belarusian Library and Museum (0.5 miles west). Not far away are Darland's Lake and Glebelands Local Nature Reserve.
When it is not 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
- Leaks from a shower valve, waste or pipework (a plumber’s job)
- Cracks in the tray itself rather than the joint
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly before you book.
Surfaces we seal
- Sinks & splashbacks
- Basins & vanity units
- Wet rooms
- Kitchen worktops & upstands
- Baths
- Shower trays & enclosures
Leave it or put it right?
A quick bead over the top of the old one might look better for a while, but it will not bond. Water creeps under it and mould follows, and the next reseal means two layers to cut out. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in North Finchley, the repair is bigger than the sealant job would have been.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Why choose Mr Mastic in North Finchley
- Fully insured
- You choose the colour before work begins
- Anti-fungal silicone where joints get wet
- Approved under the ARBOMaster scheme
Take a look at our cost guide or our reviews.
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Avoid abrasive pads on the sealant
- Do not leave water standing on kitchen joints
- Open a window or run the fan so the room dries
- Clean with a mild bathroom cleaner and a soft cloth
Good ventilation does more than any cleaner. Run the extractor fan during and after a shower, so the silicone gets a chance to dry.
A split bead lets water through every time the bath or shower is used. Left alone, it soaks into the floor, the wall behind the tiles or the ceiling below. Early resealing closes the gap before damage is done.
FAQs for North Finchley
Do you work for landlords with property near New Southgate station?
Yes. We work for landlords and agents as well as householders, and several properties can go on one quote. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
I live in a flat in North Finchley. Can a failed seal leak into the flat below?
Yes, and the first sign is often a stain on the ceiling below. Cutting out the old sealant and laying a new bead early stops it getting that far.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover North Finchley and the rest of Greater London, along with the rest of our area.
Do you come to North Finchley?
Yes. We cover North Finchley and the rest of Greater London, as part of our work across South East England, London and Scotland. To book, call 0345 464 0079 or email us.
How long will the resealing take?
It depends on how many joints there are and how much old sealant has to come out. For most single baths or showers, allow a couple of hours.
Is the work guaranteed?
Yes. Our 12-month guarantee covers every job, and we are ARBOMaster approved applicators.
What happens on the day
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take half a day or less for one room, longer when the kitchen is included. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. 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.
- The joint is cleaned, degreased and treated for mould.
- The joint is left to dry, and baths are filled with water first.
- A single bead of anti-fungal sanitary silicone is applied and tooled smooth.
- We tidy up and give you the cure time, generally around 24 hours.
Getting ready for the visit
- Clear items away from the joints we’re working on
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
Ask for a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll talk you through the work.
Related advice
Surface by surface
Basins & vanity units
The back of a basin gets wet every time someone washes. Old sealant there often goes black at the corners, so it’s cut out and renewed just like a bath joint.
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.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.