Greater London · England
White City Sand Mastic
Our applicators work in White City on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Cement or filler used on old window joints that has cracked
- Mastic worn away on windows facing the weather
- Open joints round the window box
Sand mastic in White City, done properly
Burnt sand mastic is a traditional material that sits naturally against stone and brick. It suits period and listed homes, where modern sealant can look out of place. If you’re dealing with gaps round a timber door in stone or brick and crumbling sand mastic round a window, we can help, whatever the surface.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease generally says who is responsible for the windows, so it’s worth checking before booking.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Place
- White City (W12, W11, W10)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Sand mastic in White City: local notes
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book.
For site and facilities teams at buildings such as Ark Swift Primary Academy, the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Shepherds Bush station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. Homes close to St Michael and St George include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
White City is about 1 mile north-west of Kensington, in Greater London. From the centre of White City to the outskirts, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. Our Greater London coverage runs to 764 places, and White City is one of them. We also work in London, around 6 miles away.
Jobs for sand mastic in W12, W11 and W10 is quoted and booked the same way as anywhere else. Whether your property is on Bard Road, Wood Lane and Abdale Road or a nearby road, we can help. Nearby, we also carry out sand mastic in Shepherd's Bush (1 mile south), Notting Dale (1 mile east), North Kensington (1 mile north), Notting Hill (1 mile east) and Kensal Town (1 mile north-east). Larger places within reach include London (6 miles east), City of Westminster (3 miles east), Marylebone (3 miles east), St Pancras (5 miles east), Shoreditch (6 miles east) and Walthamstow (10 miles north-east).
Around White City
Locally, jobs take us to homes and businesses close to Hammersmith Park, Star Chamber Academy and Kensington Aldridge Academy, among other places. Other local landmarks include The Favourite pub (0.5 miles south-east) and Polish Library POSK in London (1.4 miles south-west). The closest station to White City is Shepherds Bush station, roughly 0.5 miles south-east. Well-known places in the area include Princess Louise Hospital (0.5 miles north) and Culture House (0.5 miles south). Green spaces nearby include The Long Water and Greville Place nature reserve.
When something else is needed
Sealant is not the answer to every problem, and we will tell you before any work starts. Sealant will not put right:
- Putty and glazing repairs
- Sash cords, weights and draught-proofing of the sashes
- Decayed frames that need repair
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Surfaces we seal
- Brick reveals
- Stone surrounds
- Period & listed homes
- Tenement windows
- Timber door frames
- Sash and case windows
Nearby places to White City
More services for White City
How we quote for sand mastic
The quote reflects the job in front of us. We take into account:
- Access and height
- The number and length of the joints
- Whether old sealant or filler has to be cut out
- Any working-time requirements on site
Leaving a failed joint usually makes the job bigger, not smaller. If you’re unsure, phone 0345 464 0079 or drop us an email for an honest opinion and a quote.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- What’s wrong with the joints now
- Any previous sealing or DIY work
- The type of property
- The rough size of the job
If you’re in White City and need sand mastic, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you will get a clear quote before work begins.
Your questions about sand mastic in White City
Do you cover White City for sand mastic?
Yes. We work across London and the South East, and White City is part of that. Just ring 0345 464 0079 or email us with a few details of the job.
I let a flat near Shepherds Bush station. Can you help?
Yes. We work for letting agents and landlords as well as householders. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
How long does sand mastic take to go off?
A skin forms quite soon, but full hardening takes longer. We’ll explain what to expect before we leave.
Where do you work from?
Mr Mastic is based in Crawley. We cover White City and the rest of Greater London, along with the rest of our area.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few pictures.
What exactly is sand mastic?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
Do I need to be at home?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Do you do commercial work?
Yes, regularly. We can plan bigger jobs in stages.
For landlords and businesses
Landlords and agents in White City can book us as well as householders. Resealing between tenancies keeps a property looking cared for.
Housing providers, facilities teams and property managers book us too. Several sites can go on one quote.
Leave it or put it right?
If you are redecorating, renew the mastic first. Paint over cracked mastic won’t stop the gaps, and the new mastic is traditionally left unpainted. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble.
What you pay reflects the work, not guesswork. That is why we ask a few questions first.
What you get with us
- 12-month guarantee on every job
- Anti-fungal sanitary silicone in wet areas
- Fully insured
- Approved under the ARBOMaster scheme
Read what affects the cost or our reviews.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Inspect the joints round the windows every year or so
- Don’t run silicone over sand mastic
- Leave the new mastic unpainted
- Get any rot dealt with first
Avoid painting over the new mastic, as traditional guidance advises. If you are redecorating, ask us first.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.
What we do, step by step
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself normally takes a few hours per window, depending on the condition of the joints, depending on how much there is to do. For a job in White City, 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 look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
How to prepare
- Move anything stored near the joints
- For business premises, tell us about site rules or sign-in
- Mention any leaks or damp you’ve noticed
Getting a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Read more
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
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.