Greater London · England
Remedial sealant & repairs in St Giles, Greater London
Removing failed, mouldy or leaking sealant and putting it right in St Giles, with a 12-month guarantee on every job. Call for a quick quote.
- Leaks that keep coming back after resealing
- Smears and lumps from a botched reseal
- Sealant applied over old sealant that has lifted
Quotes for remedial sealant in St Giles
We quote each job individually. These are the things that affect it:
- Whether there’s mould to deal with
- How many rooms, windows or areas are involved
- Whether the work is at height
- The old material and how stubborn it is
What it costs depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
- A few pictures by email, if you can
- What’s wrong with the joints now
We don’t publish a price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, ring 0345 464 0079 or drop us an email.
Remedial sealant in St Giles, done properly
If a joint has been resealed and is leaking again, it’s worth a proper look. Send photos when you call 0345 464 0079 or email us, and say how long ago it was last done. We work on shrunken worktop sealant, mouldy bath & shower sealant and botched or over-sealed joints, and common reasons people get in touch are sealant that came away because the surface wasn’t prepared and smears and lumps from a botched reseal.
London homes include a lot of flats, conversions and mansion blocks, so a bathroom is often directly above a neighbour’s ceiling. In St Giles, that is a good reason to put tired sealant and grout right early.
Every job is covered by our 12-month guarantee.
- Where
- St Giles (W1F, W1D, W1T)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
When something else is needed
To be straight with you, there are a few things sealant won’t fix:
- Tiles that have come away from the wall
- Old mastic in a building from before 2000 that should be checked for asbestos before it’s disturbed
- Cracks in the fitting rather than the joint
If you are not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer before you book.
What we seal
- Leaking tray & enclosure joints
- Mouldy bath & shower sealant
- Failed movement joints
- Expansion joints
- Botched or over-sealed joints
- Shrunken worktop sealant
What remedial sealant looks like in St Giles
In a London flat, water from a failed bath or shower seal can reach the neighbours below, which is why it’s worth fixing early. London has hard water, which leaves limescale on sealant, grout and taps.
For an older house near a landmark such as Soho Baptist Chapel, walls and floors in older homes can move, and sealant and grout show it first. Schools such as St Josephs Catholic Primary School are buildings too, and we reseal washrooms and kitchens in schools and businesses as well as homes.
St Giles is about 1 mile east of City of Westminster, in Greater London. Wherever you are in the W1F postcode area, we can carry out remedial sealant at your property. Across Greater London, we cover 764 places, and St Giles is one of them.
Every address in W1F, W1D and W1T is covered for remedial sealant. Whether your property is on Duck Lane, Drury Lane and Bridle Lane or anywhere close by, our applicators can take on the job. With the A301 and A400 close by, St Giles is simple for us to get to for remedial sealant. We also cover Seven Dials (1 mile south), West End (1 mile south-west), Soho (1 mile south-west), Covent Garden (1 mile south-east) and Chinatown (1 mile south-west). We also work in nearby towns such as 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).
Local landmarks in St Giles
Around St Giles, our work takes us to homes and buildings near LSE Shaw Library, The Crown pub and Mercers' School and the streets around them. Also close by are London Nautical School (1 mile south-east) and St Anne's Churchyard (under half a mile south-west). There’s a railway station in St Giles itself: Tottenham Court Road station. Well-known places in the area include Montfichet's Tower (1.1 miles east) and Kingly Court (0.5 miles west). Open spaces near St Giles include Barnsbury Wood and Ludgate Hill.
Different surfaces, different methods
Mouldy bath & shower sealant
Mould can sit behind the silicone, not just in it. We treat the exposed joint once the bead is out.
Over-sealed & botched joints
Botched joints sometimes have damaged edges from earlier scraping. We work carefully to avoid adding to it, and point out any existing damage.
Places near St Giles
Also in St Giles
Why it’s worth doing now in St Giles
Spraying mould remover on a sealed-over joint does not reach what’s underneath. The layers have to come out, so the joint can be treated and resealed. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble for homes in St Giles.
Combining jobs into one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Why book with us
- Trusted Arbo and Everbuild sealants
- Approved under the ARBOMaster scheme
- A 12-month guarantee on all work
- White, clear, grey or coloured to suit, where the product allows
Take a look at how sealant jobs are priced and our reviews.
How the visit works
At the end, we look at the finished work together and explain the cure time. The work normally takes a few hours, depending on how many layers have to come out, depending on the size of the job. In a London area like St Giles, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- Surrounding tiles, trays and frames are protected first.
- Every layer of failed sealant is stripped out.
- The joint is degreased and checked for movement and leaks.
- Once dry, a suitable sealant is applied and tooled.
- We give you the cure time and explain what caused the failure.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Mention if the joints have been sealed before
- Let us know about parking restrictions
Get a quote
If you are in St Giles and need remedial sealant, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Advice
Common questions in St Giles
I let a flat near Tottenham Court Road station. Can you help?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
Do you work for hotels and guest houses in St Giles?
Yes, we work for hotels as well as homes and businesses. Rooms can be done a few at a time, so the building stays open.
Where is Mr Mastic based?
We work from Crawley. We cover St Giles and the rest of Greater London, along with the rest of our area.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is generally more efficient.
What if resealing won’t fix my leak?
In that case, we tell you what we have found. A plumber or fitter may be needed before any new sealant goes on.
Are you insured?
Yes. Mr Mastic is fully insured, and we’ve been doing sealant work for more than 20 years.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
Will you leave a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
How to look after the new joints
So the new joints stay in good condition:
- Use a soft cloth, not a scourer, on silicone
- Look for stains below bathrooms now and then
- Run the fan after every shower
- Get the cause of a repeat leak found before resealing
Ventilation keeps mould away from the new bead: run the fan during and after showers, or open a window.
Do not keep resealing the same joint. Get the cause found first, or the next bead will go the same way.
Do you need remedial sealant in St Giles?
How a joint is built matters as much as the product. A bead bonded on three sides, or laid too thick, cannot flex, so it tears when the joint moves. Backing sets the depth and stops that.
These are the problems we’re asked about most:
- Leaks that keep coming back after resealing
- Smears and lumps from a botched reseal
- A second bead peeling off the first
- Caulk or the wrong sealant used in a wet area
Letting a property close to Tottenham Court Road station? Then a joint that keeps failing is best fixed properly while the property is empty.
What your quote should include
- What the quote includes, VAT included or not
- How much experience the applicator has
- Which colour the sealant will be
- What product goes in the joint