Greater London · England
Sand Mastic in Brixton
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Brixton, with a one-year guarantee on every job. Ask us for a quote.
- Cement or filler used on old window joints that has cracked
- Silicone on a period window that looks wrong
- Draughts and rain around sash boxes
When it is not the sealant
A few problems are outside what sealant work can do:
- Decayed frames that need repair
- Whether work needs listed building consent
- Broken panes
If you are not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
Where we work in Brixton
- Tenement windows
- Stone surrounds
- Sash and case windows
- Timber door frames
- Brick reveals
- Period & listed homes
How we handle sand mastic in Brixton
We work across Brixton renewing sand mastic on sash windows and doors. Every joint is cleaned out and filled by hand, finished to suit the masonry. Common call-outs are for window mastic to renew ahead of painting and mastic worn away on windows facing the weather, across stone surrounds, brick reveals and timber door frames.
Many London homes are flats, with windows high above the street. Who looks after the outside of the frames can depend on the lease, so check that first, and access in Brixton is something to talk through when you book.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Brixton (SW2, SW9, SW4)
- Region
- Greater London
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Brixton questions
Is parking a problem for a job in Brixton?
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.
I let a flat near Brixton station. Can you help?
Yes, we work for landlords and agents. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Which is right for my windows, sand mastic or modern sealant?
Sand mastic usually suits period timber windows best. Modern frames normally suit a flexible sealant.
How long does sand mastic take?
As a guide, most jobs take a few hours for a single window, longer for several. Bigger jobs take longer, and we will say how long yours will take.
Where are you based?
We are based in Crawley, West Sussex, and we work across South East England, London and Scotland.
What is sand mastic?
Sand plus a binder based on linseed oil. It’s built up in the joint by hand and finished to sit neatly against the masonry.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Do you do commercial work?
Yes. We can plan bigger jobs in stages to suit the site.
What we do, step by step
You do not need to clear the whole room or building, only the area right around the joints. We protect the rest, and the job takes anything from a few hours to a full day, depending on how many windows for a typical job. For a job in Brixton, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about stairs, lifts or work at height
- Mention any leaks or damp you’ve noticed
Get a quote
To get a quote, ring 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
Related advice
What happens if it’s left?
Cement-based fillers and modern sealants don’t always suit a period surround. Sand mastic is the like-for-like choice and that can be important for listed homes. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Brixton, the repair is bigger than a sealant job.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or drop us an email and we will talk you through it.
Why book with us
- Homes, businesses and hotels
- Full insurance on every job
- We never seal over old sealant
- An ARBOMaster approved applicator
Take a look at what affects the cost and what customers say.
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Towns and villages near Brixton
What else we do in Brixton
How we quote for sand mastic
Every job gets its own quote. This is what makes a difference:
- Whether there’s mould to deal with
- Access and height
- Working hours on commercial sites
- Which sealant suits the joint
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- The problem you’ve noticed
- A few photos by email, if you can
- Any access issues, like height or stairs
- The address or postcode of the job
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few photos by email make the job easier to understand.
Sand mastic in Brixton: local notes
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. In London conversions and blocks, the lease decides who is responsible for the frames, so check that before booking.
Schools such as Sudbourne Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. As a London address, Brixton can be tricky for parking: let us know about parking bays, permits or a driveway. If you live in an older home near Trinity Congregational Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Brixton is about 1 mile south of Stockwell, in Greater London. From the centre of Brixton to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 764 places across Greater London.
We work across SW2, SW9 and SW4 for sand mastic. Streets in the area include Acre Lane, Jelf Road and Trent Road. Brixton is on the A204 and A2217, which makes it straightforward to reach with everything needed for sand mastic. If you’re just outside Brixton, we cover Stockwell (1 mile north), Clapham Park (1 mile west), Angell Town (1 mile north), Loughborough Junction (1 mile north-east) and Tulse Hill (1 mile south-east). Within a short drive, we also cover London (3 miles north), City of Westminster (4 miles north), Marylebone (4 miles north), Kensington (5 miles north-west), St Pancras (5 miles north) and Shoreditch (5 miles north).
What’s near Brixton
We work in homes and buildings around Trinity Arms, Max Roach Park and Trinity Academy, among other places. There’s a railway station in Brixton itself: Brixton station. Well-known places in the area include London General Cab Company Museum (0.9 miles north) and Baynard's Castle (3.8 miles north). Not far away are Battersea Park Lake and Centre for Wildlife Gardening.
Looking after it afterwards
To keep the joints looking good and working properly:
- Ask the planning authority about consent for listed or conservation-area homes
- Look over the window mastic once a year
- Avoid heavy scraping on the mastic joint
- Get any rot dealt with first
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at before trying a quick fix.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
What the job involves on each surface
Brick reveals
We rake out the old mastic and pack deep voids before the new mastic goes in.
Stone surrounds
Sand mastic sits naturally against stone. The finish blends with the masonry.