Greater London · England
Window Mastic in Clare Market
Window mastic for Clare Market and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Cracked or shrunken mastic around the frame
- Draughts coming in around windows and doors
- Water coming in at the bottom corners of a door
About our window mastic in Clare Market
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; inside, the joint between frame and plaster stops draughts and tidies the reveal. We seal one or both, depending on what’s needed. We work on window sills, aluminium frames and patio & French doors, and people most often call us about gaps where the sill meets the wall and rain getting in at the frame or under the sill.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. Over the years, the sealant around them shrinks, cracks and pulls away, which is when draughts and damp patches appear in homes in Clare Market.
All our work is covered by a 12-month guarantee, wherever you are in Greater London.
- Place
- Clare Market (WC2H, W1D, WC2B)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Clare Market questions
Can you help a landlord with a rental near London Charing Cross station?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Is parking a problem for a job in Clare Market?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Can I paint over the new sealant?
Most silicone can’t be painted. Let us know beforehand, and we will use a paintable product where it suits.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
How long does it take to reseal the windows on a house?
The work takes a few hours for a handful of frames, longer for a whole house. Access and the amount of old mastic make the biggest difference.
Do you work on first-floor windows?
Yes, where it’s safe. For high or awkward windows, we will tell you what access is needed.
Will resealing my frames help with draughts?
Yes, if the air is getting in around the frame. If it’s coming through the window seals, we’ll tell you.
Why deal with it now?
Running fresh sealant over the old joint is tempting, but it won’t grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why book with us
- Over 20 years’ experience
- Arbo and Everbuild products
- Neat joints and a tidy finish
- We never seal over old sealant
See our cost guide and customer reviews.
When it isn’t the sealant
A few problems are outside what sealant work can do:
- A frame that has rotted at the joint
- Faulty window hardware
- Damp problems in the wall away from the window
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly.
Surfaces we seal
- Composite doors
- Patio & French doors
- Aluminium frames
- Window sills
- Timber windows & doors
- uPVC windows
What we do, step by step
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a morning for a couple of windows and a door. In Clare Market, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
- Let us know if you’ve seen damp or leaks
Get a quote
To get a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. We’ll send you a clear quote before any work starts.
Related advice
Common problems we fix in Clare Market
Water runs down the glass onto the sill, and the ends of the sill, where it meets the wall, are where it gets in. When that sealant fails, water gets into the wall or under the frame.
Look out for any of the following:
- Draughty joints inside around the window
- Untidy mastic left by window fitters
- Rain getting in at the frame or under the sill
- Black, perished sealant on frames
Letting a property close to London Charing Cross station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Questions to ask before you book
- What the cure time is
- How much experience the applicator has
- Is VAT in the price?
- Is the old sealant removed completely?
Work for landlords, hotels and businesses
Letting agents and landlords in Clare Market can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will give you a quote.
Towns and villages near Clare Market
Other services in Clare Market
Clare Market homes and the weather
Historic houses like Dr Johnson's House (about 0.4 miles east) are a reminder that the area around Clare Market has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as St Clement Danes CofE Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. In the older streets around Enon Chapel, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Clare Market is about 1 mile south of St Pancras, in Greater London. Jobs in Clare Market get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Clare Market is one of 764 towns and villages in Greater London we cover for window mastic.
We cover every part of WC2H, W1D and WC2B for window mastic. Streets in the area include Drury Lane, New Square and Old Square, and we cover them all. With the A4 and A301 close by, Clare Market is easy for our applicators to reach. Close by, we work in 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). Further out, we also cover 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).
Around Clare Market
We work in homes and buildings around Lincoln's Inn Fields, London Nautical School and LSE Shaw Library and the streets around them. You’ll also find Ye Old White Horse pub (within half a mile north) and Mercers' School (under half a mile north-east). The closest station to Clare Market is London Charing Cross station, about 0.6 miles south-west. Other landmarks nearby include St Philip's Hospital (less than half a mile north-west) and Montfichet's Tower (0.7 miles east). Green spaces nearby include Ludgate Hill and St. James's Park Lake.
What affects the cost of window mastic
For a quick quote, just ask. The main things that affect it are:
- Whether old sealant or filler has to be cut out
- The number of rooms or windows
- Working hours on commercial sites
- Access and height
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we will explain the quote if you ask.
Asking for a quote
When you call or email, these details help:
- Access, such as stairs, a lift or height
- What the problem is, such as mould, gaps, leaks or cracking
- The address or postcode of the job
- The type of property
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or drop us an email with the details.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.