Greater London · England
Remedial sealant & repairs in Seven Dials, Greater London
Specialist remedial sealant for Seven Dials: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Thick, messy sealant smeared over tiles
- Sealant that came away because the surface wasn’t prepared
- Kitchen joints letting water behind the worktop
Remedial sealant for homes and businesses in Seven Dials
In Seven Dials, as anywhere, remedial jobs tend to look alike: over-sealed joints, hidden mould, repeat leaks and split movement joints. Each is stripped back and done again properly. Common call-outs are for dark patches showing through the sealant and sealant that came away because the surface wasn’t prepared, across failed movement joints, shrunken worktop sealant and mouldy bath & shower sealant.
London homes include a lot of flats, conversions and mansion blocks, so a bathroom is often directly above a neighbour’s ceiling. In Seven Dials, that is a good reason to put tired sealant and grout right early.
Each job carries a 12-month guarantee, whatever its size.
- Place
- Seven Dials (W1F, W1D, W1T)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What affects the quote in Seven Dials
Some jobs are bigger than they look, and some smaller. The main factors:
- Any working-time requirements on site
- How easy the joints are to reach
- The size of the job
- The type of sealant required
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we’ll explain what it covers.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The problem you’ve noticed
- A few pictures by email, if you can
- Where the property is
- How many joints, rooms or windows are involved
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you are ready, phone 0345 464 0079 or send us an email.
What sealant work cannot fix
New sealant can’t fix everything, and we’d rather say so up front. It will not solve:
- Movement from fittings that are not supported
- Leaks from a shower valve, waste or pipework (a plumber’s job)
- Failed tanking or loose tiles behind the sealant
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
What we seal
- Expansion joints
- Mouldy bath & shower sealant
- Leaking tray & enclosure joints
- Failed movement joints
- Botched or over-sealed joints
- Shrunken worktop sealant
How the job changes by surface
Movement & expansion joints
Movement joints in floors, walls and façades need a flexible sealant set to the right depth. We remove the failed sealant, fit backing and reseal with a low-modulus product.
Over-sealed & botched joints
Thick, smeared sealant looks messy and hides problems. We strip it back so we can see the joint.
Questions from Seven Dials
Is parking a problem for a job in Seven Dials?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Do you work for landlords with property near Tottenham Court Road station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or email us with the details for a clear quote.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you when we finish.
Can failed expansion joints be resealed?
Yes. We cut out the failed sealant, fit backing and reseal with a flexible product.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Can you fix a reseal that hasn’t worked?
Yes. All the sealant comes out, we find out why it failed, and the joint is resealed properly.
Is remedial work guaranteed?
Yes, for 12 months. If we have pointed out another problem, getting it fixed helps the new joint last.
Is there any odour?
Some sealants have a smell while they cure. Opening a window helps.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
We also work for property managers and facilities teams. Several sites can go on one quote, and we’re fully insured.
What we do, step by step
A visit follows a simple pattern: we look at the joints together, protect the area around them, carry out the job and tidy away. It normally takes a few hours, depending on how many layers have to come out. In Seven Dials, 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.
- We look at how the sealant has failed and check for movement or a leak path.
- We strip the joint completely, removing any layers below.
- Next, any mould is treated and the joint dried.
- Moving joints get backing and a flexible sealant to suit.
- We tool the joint and tell you about anything else that needs attention.
Before we arrive
- Mention if the joints have been sealed before
- Keep pets and children clear of the area while we work
- Mention any sign-in or site rules at work premises
Ask for a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or drop us an email.
Advice
Also near Seven Dials
More services for Seven Dials
What happens if it’s left?
Spraying mould remover on a sealed-over joint does not reach what’s underneath. The layers have to come out. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or email us.
Why book with us
- Domestic, commercial and hotel work
- Neat joints and a tidy finish
- We are fully insured
- White, clear, grey or coloured to suit, where the product allows
See what affects the cost and what customers say.
Common problems we fix in Seven Dials
Some joints fail because water is reaching them from behind. A slow leak behind the tiles soaks the joint from the back, and the sealant lifts or goes mouldy from underneath.
Signs it’s time to call us include:
- Kitchen joints letting water behind the worktop
- Repeat leaks from the same joint
- Over-sealed joints coming away
- Beads that never stuck properly
Homes close to Soho Baptist Chapel include some older properties, and bathrooms in older houses have often been refitted more than once, with sealant laid over sealant.
What your quote should include
- Whether all the old sealant comes out first
- What guarantee comes with the work
- What product goes in the joint
- How the joint is cleaned and prepared
Remedial sealant in Seven Dials: local notes
There are hotels and other places to stay in and around Seven Dials. As well as homes, we work in hotel bathrooms, where resealing and regrouting can be done room by room. London has hard water, which leaves limescale on sealant, grout and taps, and it has to be cleaned off before new sealant goes in.
Seven Dials is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. For site and facilities teams at buildings such as St Josephs Catholic Primary School, we reseal washrooms and kitchens in schools and businesses as well as homes.
Seven Dials is about 1 mile east of City of Westminster, in Greater London. Seven Dials gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Our area takes in 764 places across Greater London.
Postcode districts we cover here for remedial sealant: W1F, W1D and W1T. Streets in the area include Duck Lane, Drury Lane and Bridle Lane. With the A301 and A400 close by, Seven Dials is easy for our applicators to reach. Other places close to Seven Dials include St Giles (1 mile north), West End (1 mile west), Soho (1 mile west), Covent Garden (1 mile east) and Chinatown (1 mile south-west). Within a short drive, we also cover Kensington (3 miles west), Walthamstow (7 miles north-east), Hampstead (4 miles north-west), Ruislip (13 miles west), Stockwell (3 miles south) and Orpington (13 miles south-east).
Around Seven Dials
Typical jobs here are in homes near London Nautical School, St Anne's Churchyard and LSE Shaw Library and the streets around them. Nearby too are Two Brewers pub (under half a mile south-west) and Mercers' School (0.8 miles east). There’s a railway station in Seven Dials itself: Tottenham Court Road station. Nearby you will also find Kingly Court (0.5 miles west) and St Paul's Hospital (under half a mile north-east). Not far away are Barnsbury Wood and Ludgate Hill.