Greater London · England
Euston Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Euston, with a one-year guarantee on every job. Call for a quick quote.
- Draughts and rain around sash boxes
- Silicone on a period window that looks wrong
- Open joints round the window box
Sand mastic in Euston, done properly
Silicone on a period window often looks wrong and does not suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. Common call-outs are for wind and rain getting in round a sash window and mastic dropping out of the joint, on brick reveals, tenement windows and sash and case windows.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease usually says who is responsible for the windows, so it’s worth checking before booking, and access in Euston is something to talk through when you book.
The work is covered for a year after we finish. If anything isn’t right with it, ring 0345 464 0079 or email us.
- Location
- Euston (NW1W, W1T, NW1)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Do you need sand mastic in Euston?
Over the years, sand mastic weathers. It dries out, cracks and loses its grip on the stone or timber.
The most common problems we see are:
- Tired mastic found when preparing windows for paint
- Old cement repairs round a window that have failed
- Modern sealant on a period surround
- Old sand mastic that has cracked, crumbled or fallen out
Euston is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Before you book anyone
- The length of the guarantee
- What insurance they hold
- What product goes in the joint
- What happens if the job turns out different
Why act early in Euston
A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic suits the building and finishes neatly against the masonry. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler for homes in Euston.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, call 0345 464 0079 or email us and we will give you an honest view and a quote.
Why choose Mr Mastic in Euston
- Neat joints and a tidy finish
- 180+ five-star Google reviews
- Anti-fungal sanitary silicone in wet areas
- Every job guaranteed for a year
See our cost guide or what customers say.
How we quote for sand mastic
Every job gets its own quote. This is what makes a difference:
- Whether old sealant or filler has to be cut out
- Whether the work is at height
- The amount of work
- Whether there’s mould to deal with
A few things move the cost up or down: 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.
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:
- Where the property is
- The type of property
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
We don’t publish a price list. Instead, we send you a clear quote for your job. To arrange one, ring 0345 464 0079 or email us.
How the visit works
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before work begins. The work usually takes a few hours for a single window, longer for several. In a London area like Euston, 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.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Before we arrive
- Mention any parking rules near the property
- Clear items away from the joints we’re working on
- Tell us about any previous sealing or DIY attempts
Ask for a quote
Every job is quoted individually, so the first step is telling us about yours. Simply phone 0345 464 0079 or email us and describe the job and send photos if you have them.
Related advice
Places near Euston
What else we do in Euston
Windows and doors in Euston
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. With historic houses such as Handel Hendrix House (about 1.1 miles south-west) nearby, there’s older building stock in the area around Euston as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
For landlords with property near London Euston station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Schools such as UCL School of Slavonic and East European Studies are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Euston is about 1 mile west of St Pancras, in Greater London. Whether you are in the middle of Euston or further out, sand mastic is available for homes and businesses alike. Euston is one of 764 towns and villages in Greater London we cover.
Work in NW1W, W1T and NW1 works the same way as everywhere else we cover. Local streets include Euston Road, Duke's Road and Phoenix Road. Main roads around Euston include the A501 and A4200, which makes travel easy. Neighbouring places we cover for sand mastic include Somers Town (1 mile north), Fitzrovia (1 mile south-west), Bloomsbury (1 mile south-east), Kings Cross (1 mile north-east) and St Pancras (1 mile east). Further out, we also cover London (3 miles south-east), Kensington (4 miles south-west), Walthamstow (6 miles north-east), Whitechapel (3 miles east), Hampstead (3 miles north-west) and Ruislip (12 miles west).
Around Euston
Locally, jobs take us to homes and businesses close to Lewis Cubitt Park, The Doric Arch pub and Maria Fidelis Catholic School FCJ, among other places. Other local landmarks include St Aloysius Catholic Primary School (less than half a mile north) and Wellcome Collection (within half a mile south-west). There’s a railway station in Euston itself: London Euston station. Well-known places in the area include Brunswick Centre (under half a mile south-east) and Wellcome Collection (less than half a mile south-west). The countryside around Euston includes Primrose Hill and St. James's Park Lake.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Work for landlords, hotels and businesses
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
When something else is needed
It helps to know what we cannot do too:
- Masonry that needs repairing
- Rotten sashes, sills or window boxes (a joiner’s job)
- Sashes that need overhauling
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before booking.
What we seal
- Sash and case windows
- Tenement windows
- Brick reveals
- Stone surrounds
- Period & listed homes
- Timber door frames
FAQs for Euston
Can parking be tricky for a visit in Euston?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Can you help a landlord with a rental near London Euston station?
Yes. We work for landlords and letting agents as well as householders. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Where is Mr Mastic based?
We work from Crawley. We cover Euston and the rest of Greater London, along with the rest of our area.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Should I use sand mastic or silicone?
We will help you decide. Sand mastic suits many period homes, and modern sealants suit newer frames.
What’s sand mastic made of?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.