Greater London · England
Clare Market New Build Mastic
New build mastic for Clare Market, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps between new skirting and floors
- Gaps opening as the house dries out and settles
- Sealant work across a run of new homes
Leave it or put it right?
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it will not bond to the old layer. A lasting seal starts with removing the old one completely. 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 Clare Market.
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, phone 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Why Clare Market clients choose us
- Anti-fungal sanitary silicone in wet areas
- Approved under the ARBOMaster scheme
- A sealant colour to suit the surroundings
- Full insurance on every job
Take a look at our cost guide and what customers say.
New build mastic in Clare Market, done properly
For builders and developers, we work through plots to the schedule you give us. We seal bathrooms, kitchens, windows, doors and skirting so plots are ready to hand over with a sealant suited to each area. If you have skirting joints opening in the first winter and second-fix sealing on new plots, we can put it right, on show homes, windows & doors and skirting & floors alike.
Much of London’s new housing is flats in larger developments. In a new development, snags are often reported through the developer or the managing agent, and failed shower seals, open skirting joints and gaps at thresholds are typical.
We stand behind the work with a one-year guarantee.
- Location
- Clare Market (WC2H, W1D, WC2B)
- Wider area
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What we are called out for in Clare Market
Fresh sealant can be knocked or cut by trades finishing off. A bead disturbed before it has cured may never seal properly.
Any of these means the joints need attention:
- Worktop and upstand sealant coming away
- Messy sealant that spoils new finishes
- Gaps between new skirting and floors
- Shower seals failing in the first year or two
As a London address, Clare Market can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
What your quote should include
- How long the guarantee is
- What product goes in the joint
- What the cure time is
- How the surfaces are prepared before sealing
Towns and villages near Clare Market
More services for Clare Market
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Avoid scourers and strong chemicals on sealant
- Use the extractor fan every time you shower
- Record problems with dated photos
- Act quickly if a seal starts to leak
Watch the joints as the house settles. Hairline gaps can open as timber and plaster dry and can be resealed later.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Left alone, a small crack can become a leak over time.
What the job involves on each surface
Windows and doors
Draughts around new frames are often a sealant gap. We look at the joints and reseal where needed.
Show homes
Show homes need sealant that looks right from day one. Every bead is neat and coloured to suit the room.
New build mastic around Clare Market
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent.
For new homes near London Charing Cross station, it’s worth checking the sealant early, while snags are still fresh.
Clare Market is about 1 mile south of St Pancras, in Greater London. If you need new build mastic in Clare Market, please phone 0345 464 0079 or send us an email for a quick quote. We cover Greater London from our Crawley base. We cover 764 towns and villages across Greater London.
Here we cover the WC2H, W1D and WC2B postcode area for new build mastic. We cover properties on Drury Lane, New Square and Old Square and the roads around them. Clare Market is on the A4 and A301, so it’s easy for us to get to with everything needed for new build mastic. If you’re just outside Clare Market, we cover Aldwych (1 mile south), Temple Bar (1 mile east), Covent Garden (1 mile south-west), Temple (1 mile south-east) and Seven Dials (1 mile west). Larger places within reach include Kensington (4 miles west), Walthamstow (6 miles north-east), Hampstead (4 miles north-west), Ruislip (13 miles west), Stockwell (3 miles south) and Orpington (13 miles south-east).
Near you in Clare Market
Locally, jobs take us to homes and businesses close to Lincoln's Inn Fields, London Nautical School and LSE Shaw Library, among other places. Nearby too are Ye Old White Horse pub (under half a mile north) and Mercers' School (less than half a mile north-east). The closest station to Clare Market is London Charing Cross station, roughly 0.6 miles south-west of the centre. Nearby you’ll also find St Philip's Hospital (within half a mile north-west) and Montfichet's Tower (0.7 miles east). For a walk, there’s Ludgate Hill and St. James's Park Lake.
What we do, step by step
There isn’t much for you to do on the day. Point us to the joints and we’ll get on with it. The job generally takes a few hours for most snagging lists, longer for a run of plots. In a London area like Clare Market, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out down to clean surfaces.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- We tool every joint neatly and tell you when each area can be used.
Getting ready for the visit
- For business premises, tell us about site rules or sign-in
- Let us know about earlier repairs to the joints
- Keep children and pets away from the work area
How to get a quote
Getting a quote is simple: tell us what needs doing and where. A few photos by email make the job easier to understand, and we’ll come back to you with a quote.
Advice
What affects the quote in Clare Market
The price is agreed before any work begins. It takes into account:
- How easy the joints are to reach
- The product the joint needs
- Working hours on commercial sites
- Any mould that needs treating
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 play a part, and we’ll explain the quote if you ask.
What to tell us for a quote
What to tell us when you ask for a quote:
- Whether it has been sealed before
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
- A few pictures by email, if you can
It all starts with a short chat. Describe the problem, the location and the size of the job. When it suits you, call 0345 464 0079 or drop us an email.
FAQs for Clare Market
Do you work for landlords with property near London Charing Cross station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Is parking a problem for a job in Clare Market?
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.
What information do you need?
A short description and the location, with photos by email if possible. We will ask anything else we need to know.
Are you ARBOMaster approved?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Who should fix failed sealant in a new build?
Start with your builder while their snagging or warranty period runs. If that doesn’t work out, we are happy to quote.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Clare Market, along with the rest of our area.
How long does new build mastic take?
That depends on the amount of work, but most jobs take a few hours in a single home. We will tell you when we quote.