Greater London · England
Window Mastic in Staples Corner
Mastic around window and door frames, sills and patio doors for homes and businesses in Staples Corner and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Mastic that is falling out in pieces
- Gaps left after new windows were fitted
- Whistling draughts around closed windows
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We also work for property managers and facilities teams in Staples Corner and across Greater London. We can quote a run of properties together, and we are fully insured for the work.
About our window mastic in Staples Corner
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. We work on uPVC windows, composite doors and window sills, and people most often call us about cold air getting in at the frame edge and draughty joints inside around the window.
London has a lot of flats and conversions, where windows are often on upper floors. Who looks after the outside of the frames can depend on the lease, so check that first.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Place
- Staples Corner (NW2, NW4, NW9)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What window mastic looks like in Staples Corner
With historic houses such as Heath House (about 2.2 miles east) nearby, there’s older building stock in the area around Staples Corner as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
As a London address, Staples Corner can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. For landlords with property near Brent Cross West station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Staples Corner is about 1 mile south of Hendon, in Greater London. Whether you are in the middle of Staples Corner or further out, window mastic is available for homes and businesses alike. Staples Corner is one of 764 places in Greater London where we work for window mastic. There’s also a page for London, about 8 miles away.
Here we cover the NW2, NW4 and NW9 postcode area for window mastic. Streets in the area include Park Road, Humber Road and Oxgate Lane, and we cover them all. Other places close to Staples Corner include Brent Cross (1 mile north-east), Dollis Hill (1 mile south-west), Hendon (1 mile north), The Hyde (1 mile north-west) and West Hendon (1 mile north-west). Further out, we also cover London (8 miles south-east), City of Westminster (5 miles south-east), Marylebone (5 miles south-east), Kensington (5 miles south), St Pancras (6 miles south-east) and Shoreditch (7 miles south-east).
Near you in Staples Corner
Around Staples Corner, our work takes us to homes and buildings near Clarefield Park, Clarion and Woodfield School and the streets around them. There’s a railway station in Staples Corner itself: Brent Cross West station. Well-known places in the area include St Andrew's Hospital (0.7 miles south) and Church Farmhouse Museum (1.3 miles north). Not far away are Westbere Copse and Darland's Lake.
What happens if it’s left?
Failed mastic isn’t a reason to replace sound windows. If the frames and glass are in good order, resealing the joints is often all that’s needed. Problems with the glass or gaskets are for a window company, and we will say so. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Staples Corner, the repair is bigger than the sealant job would have been.
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
Why Staples Corner customers choose us
- Sanitary silicone with an anti-fungal additive in wet areas
- Trusted Arbo and Everbuild sealants
- We never seal over old sealant
- Colour agreed with you before any work starts
See what affects the cost and customer reviews.
Places near Staples Corner
More services for Staples Corner
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- A sash or casement that will not close properly
- A door that needs adjusting, rehanging or new seals
- A frame that has rotted at the joint
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly.
Where we work in Staples Corner
- Patio & French doors
- Window sills
- uPVC windows
- Timber windows & doors
- Aluminium frames
- Composite doors
What happens on the day
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes most of a day for a typical house, less for a few frames, depending on the size of the job. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Staples Corner. A visitor permit or a nearby bay makes the visit run more smoothly.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any water getting in
- Let us know about earlier repairs to the joints
Get a quote
For a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before work begins.
Read more
Common problems we fix in Staples Corner
Joint shape matters as much as the product. A thin smear across a wide gap has nothing to it, and a gap filled solid can’t flex. Backing rod sets the right depth.
It’s worth asking for a quote if you see:
- Gaps left after new windows were fitted
- Draughts coming in around windows and doors
- Water coming in at the bottom corners of a door
- Cracked or shrunken mastic around the frame
Schools such as Parkfield Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- How the colour is chosen
- What happens if the job turns out different
- Whether they’re fully insured
- Is VAT in the price?
Staples Corner questions
Is parking a problem for a job in Staples Corner?
Parking in Staples Corner, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
Do you cover Staples Corner for window mastic?
Yes, Staples Corner is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing.
How long will my window job take?
A few frames take a few hours. You’ll get a timescale with the quote.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Is it messy?
No. We protect the surfaces around the joints, and we tidy up before we go.
Do you seal inside as well as outside?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We do one or both.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Are you fully insured?
Yes, we are fully insured for domestic and commercial work.
Can I do it myself?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
How we quote for window mastic
We don’t publish a price list, because jobs vary so much. The quote depends on:
- Whether there’s mould to deal with
- The old material and how stubborn it is
- The product the joint needs
- When we can work, for business premises
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email.
Helping us quote
Before you ask for a quote, have a think about:
- Any previous sealing or DIY work
- Photos by email, if that’s easy
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
There’s no standard price list. Instead, we give you a clear quote for your job. To get started, call 0345 464 0079 or drop us an email.