Greater London · England
Window & door mastic in Wallington, Greater London
Mastic around window and door frames, sills and patio doors for homes and businesses in Wallington and across Greater London. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Gaps between the frame and the inside reveal
- Water coming in at the bottom corners of a door
- Draughts coming in around windows and doors
How we handle window mastic in Wallington
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re ARBOMaster approved and fully insured, and we give a 12-month guarantee on the work. We work on timber windows & doors, window sills and aluminium frames, and the jobs we see most are draughts coming in around windows and doors and a bead that doesn’t match the frame.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. The mastic around them dries out and cracks with age, which is when draughts and damp patches appear in homes in Wallington.
The work is covered for a year after we finish. If anything isn’t right with it, ring 0345 464 0079 or send us an email.
- Where
- Wallington (SM6, SM5)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What happens if it’s left?
Getting a straight, even bead on an outside frame takes practice, especially upstairs. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Wallington, the repair is bigger than a sealant job.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Call for a quick quote and we will explain what it covers.
Why book with us
- Experience in homes, commercial sites and hotels
- Any old sealant cut out fully, not covered over
- Quality sealants from Arbo and Everbuild
- Approved under the ARBOMaster scheme
Take a look at our cost guide or customer reviews.
Towns and villages near Wallington
What else we do in Wallington
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
How we quote for window mastic
Jobs vary more than people expect. The main factors:
- How many rooms, windows or areas are involved
- Any working-time requirements on site
- The type of sealant required
- How easy the joints are to reach
What it costs depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins, so you know where you stand.
What to tell us for a quote
What to tell us when you ask for a quote:
- Whether it has been sealed before
- Any access issues, like height or stairs
- The problem you’ve noticed
- Where the job is, and your postcode
There’s no standard price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or email us.
The process
When we arrive, we start by going over the job with you, so you know exactly what we are doing. We protect the surfaces around the joints before any work starts. Most jobs take a few hours for a handful of frames, longer for a whole house. In Wallington, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We check each frame and agree which ones need doing.
- We remove the old mastic and clean the frame and the wall.
- Where gaps are deep, backing rod goes in first.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Before we arrive
- Try not to wet indoor joints just before the visit
- Plan for the work area to be out of bounds to pets and children
- Move anything stored near the joints
Getting a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Read more
Surface by surface
uPVC windows
uPVC expands and contracts noticeably with temperature, so we use a flexible, low-modulus sealant. White is the usual colour, with brown, anthracite grey and black for coloured frames.
Patio & French doors
Heavy door frames can move more than windows. The sealant must cope with it without cracking.
Frames and glazing around Wallington
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 it’s worth checking before booking.
Managing a site like Holy Trinity CofE Junior School? Then its window and door frames need their mastic kept sound, just like a home’s. Wallington is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Wallington is about 2 miles west of Croydon, in Greater London. We provide window mastic to homes and businesses in Wallington, as part of our work across Greater London. Wallington is one of 764 places in Greater London we cover. There’s also a page for London, about 10 miles away.
We work across SM6 and SM5 for window mastic. If you need window mastic at a property on Wallington Square, London Road and Maldon Road or anywhere close by, we can help. You’ll find Wallington on the A237 and B271, which makes it straightforward to reach with everything needed for window mastic. If you are just outside Wallington, we cover Bandonhill (1 mile east), Carshalton (1 mile west), Beddington (1 mile north-east), The Wrythe (1 mile north-west) and Roundshaw (1 mile south-east). We also work in nearby towns such as London (10 miles north), City of Westminster (10 miles north), Marylebone (11 miles north), Kensington (10 miles north), St Pancras (11 miles north) and Shoreditch (12 miles north).
Local landmarks in Wallington
Locally, jobs take us to homes and businesses close to Carshalton Park, Dukes Head Public House and Wallington County Grammar School, among other places. Wallington has its own railway station: Wallington station. Other landmarks nearby include Honeywood Museum (0.6 miles west) and Centrale Croydon (2.2 miles east). Open spaces near Wallington include Sutton Ecology Centre Grounds and Duppas Hill.
Common questions in Wallington
Can parking be tricky for a visit in Wallington?
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.
Do you cover Wallington for window mastic?
Yes. We work across London and the South East, and Wallington is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear quote.
When is the sealant fully cured?
That depends on the sealant used, so follow the cure time we give you.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We will tell you what we’re using and why.
Are you insured?
Yes, we are fully insured for domestic and commercial work.
Where do you work from?
We work from Crawley. Our applicators cover Wallington.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can I paint over the new sealant?
It depends on the sealant. Silicone is not paintable, but some hybrid sealants are. Mention any painting plans before we start.
Landlord and commercial work in Wallington
Landlords and letting agents in Wallington can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
We also work for property managers and facilities teams. Several sites can be quoted together, and we are fully insured for the work.
Common problems we fix in Wallington
Mastic ages in the weather. Sunlight dries the surface out, until it loses its stretch and starts to crack.
Any of these means the joints need attention:
- Cracked sealant at the sill ends
- Sealant in the wrong colour for the frame
- Hard, cracked sealant around windows
- Untidy mastic left by window fitters
If you let a flat or house near Wallington station, renewing tired window mastic between tenants heads off draught and damp complaints.
Questions to ask before booking
- How hidden problems are handled
- Who turns up on the day
- What product goes in the joint
- Which colour the sealant will be