Greater London · England
Window & door mastic in Millbank, Greater London
We cover Millbank for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly.
- Leaking joints at the ends of sills
- Mastic that’s falling out in pieces
- White mastic on grey or black frames
When it is not the sealant
A few problems are outside what sealant work can do:
- Draughts through the window seals rather than the frame
- Penetrating damp from a failed cavity tray or render
- Condensation trapped between the panes
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before you book.
Where we work in Millbank
- Window sills
- Timber windows & doors
- Aluminium frames
- Composite doors
- uPVC windows
- Patio & French doors
Window mastic in Millbank, done properly
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. If you are dealing with black, perished sealant on frames and cracked or shrunken mastic around the frame, we can help.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
Your job is guaranteed for a year, as with all our work.
- Where
- Millbank (SW1P, W1J, SW1V)
- Region
- Greater London
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What we are called out for in Millbank
Frames are never completely still. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the masonry beside it stays put. If the sealant can’t stretch, it splits.
If you can see any of these, it’s time to have the joints looked at:
- Draughty joints inside around the window
- Black, perished sealant on frames
- Damp patches on the reveal after heavy rain
- Rushed sealant from a window installation
Millbank is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Questions to ask before you book
- Who does the work, and how experienced they are
- The length of the guarantee
- Which colour the sealant will be
- Is VAT in the price?
Can I do it myself?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Millbank questions
Is parking a problem for a job in Millbank?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Can you do window mastic in Millbank?
Yes. We work across London and the South East, and Millbank is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
What does window mastic cost?
Size, access and the old material all affect the cost. Call for a quick quote.
Is the new sealant paintable?
It depends on the sealant. Some hybrid sealants can be painted; silicone can’t. Mention any painting plans before work begins.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
Do the sealants smell?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
Can you do several jobs on one visit?
Yes. More than one area can go on one quote.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
How the visit works
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the job takes anything from an hour or two to a full day, depending on how many frames there are for a typical job. In a London area like Millbank, 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.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- 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
- Keep pets and children clear of the area while we work
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.
Related advice
Why it’s worth doing now in Millbank
Getting a straight, even bead on an outside frame takes practice, especially upstairs. We cut out properly, back deep gaps and tool every joint neatly, in a sealant suited to the wall. In a flat in Millbank, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts.
What you get with us
- You choose the colour before work begins
- Approved under the ARBOMaster scheme
- Trusted Arbo and Everbuild sealants
- We are fully insured
See what affects the cost and customer reviews.
How we quote for window mastic
For a quick quote, just ask. What matters most is:
- The number and length of the joints
- The type of sealant required
- Whether the work is at height
- Any working-time requirements on site
Combining jobs into one visit generally makes better use of the time than several visits. You will get one clear quote for the whole job.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Any previous sealing or DIY work
- The address or postcode of the job
- The rough size of the job
- If it’s domestic, commercial or a hotel
We don’t publish a price list. Instead, we give you a clear quote for your job. To arrange one, ring 0345 464 0079 or email us.
Frames and glazing around Millbank
With historic houses such as Clarence House (about 0.4 miles north-west) nearby, there’s older building stock in the area around Millbank as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to London Victoria station? Then renewing tired window mastic between tenants heads off draught and damp complaints. In the older streets around Christ Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Millbank is about 1 mile south-east of City of Westminster, in Greater London. From the centre of Millbank to the outskirts, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Millbank is one of 764 places in Greater London where we work for window mastic.
Postcode districts we cover here for window mastic: SW1P, W1J and SW1V. Window mastic is available to properties on Eaton Lane, Wilton Road and Castle Lane and the roads around them. Millbank sits on or near the A4 and A202, so getting to you is simple. Other places close to Millbank include Westminster (1 mile north), Victoria (1 mile south-west), Pimlico (1 mile south), Vauxhall (1 mile south-east) and Lambeth (1 mile south-east). We also work in nearby towns such as Kensington (3 miles west), Shoreditch (3 miles north-east), Walthamstow (8 miles north-east), Hoxton (3 miles north-east), Whitechapel (3 miles north-east) and Hampstead (4 miles north-west).
What’s near Millbank
Locally, jobs take us to homes and businesses close to Blewcoat School, St Matthew's School and London Library. Other local landmarks include St James's Park (under half a mile north) and Grafton Arms (less than half a mile south). The closest station to Millbank is London Victoria station, about 0.6 miles south-west of the centre. A little further out are Westminster Hospital (less than half a mile east) and Kingly Court (0.9 miles north). Green spaces nearby include St. James's Park Lake and Ludgate Hill.
Places near Millbank
Other services in Millbank
For landlords and businesses
If you manage several properties in or around Millbank, several properties can be quoted together. Send us the addresses and the work at each.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.