Greater London · England
Window and door sealing in Uxbridge
Problem with your window and door frames in Uxbridge? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Mastic that has split away from the wall
- Cracked internal joints between frame and plaster
- Cracked sealant at the sill ends
About our window mastic in Uxbridge
Homes in Uxbridge have every kind of window: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. Typical jobs include hard, cracked sealant around windows and cracked internal joints between frame and plaster, on timber windows & doors, aluminium frames and composite doors. Some people call us the mastic man, others the silicone man or the sealant specialist, but the work in Uxbridge is the same: proper preparation and the right sealant for every joint.
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 Uxbridge is something to talk through when you book.
Big or small, you get the same one-year guarantee in Uxbridge and across Greater London.
- Location
- Uxbridge (UB8, UB10, UB9)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 07833 053749
- Updated
- 26 October 2026
Surface by surface
Composite doors
An exposed front door gets wind-driven rain. Those corners get the most care.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We’ll tell you which suits your home.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Do not aim a pressure washer at the joints
- Walk round the house once a year and look at the joints
- Ventilate rooms so frames don’t stay wet inside
- Clean frames with a soft cloth and soapy water
Try not to touch the new joint while it cures, following the cure time we give you. Don’t point a pressure washer at the joints.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. Resealing closes it.
When something else is needed
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Damp coming through the wall itself rather than the frame joint
- A failed sealed unit that has misted up
- Draughts through the window seals rather than the frame
Not sure which it is? You can ring 07833 053749 or send us an email and we will tell you honestly before you book.
What we seal
- Window sills
- Timber windows & doors
- Aluminium frames
- Composite doors
- uPVC windows
- Patio & French doors
For landlords and businesses
We also work for property managers and facilities teams. Several sites can go on one quote, and we’re fully insured.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will give you a quote.
What window mastic looks like in Uxbridge
Historic houses like Ickenham Hall (about 2.2 miles north-east) are a reminder that the area around Uxbridge has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
For landlords with property near West Drayton station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. If you live in an older home near Church of St Andrew, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. As a London address, Uxbridge can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Uxbridge is about 3 miles north-west of Hayes, in Greater London. Across the UB8 area, we cover window mastic for homes and businesses. Across Greater London, we cover 786 places, and Uxbridge is one of them.
All of UB8, UB10 and UB9 is covered for window mastic, from the main roads to the quietest streets. We cover properties on York Road, Lawn Road and How's Road and the roads around them. You’ll find Uxbridge on the A4007, which makes it straightforward to reach with everything needed for window mastic. If you are just outside Uxbridge, we cover Cowley (1 mile south), New Denham (1 mile north-west), Hillingdon (1 mile east), Ickenham (2 miles north-east) and Yiewsley (2 miles south). Larger places within reach include City of Westminster (14 miles east), Marylebone (14 miles east), Kensington (12 miles east), Hampstead (13 miles east), Ruislip (4 miles north-east) and Brompton (14 miles east).
Near you in Uxbridge
We work in homes and buildings around Three Tuns pub, West Middlesex College and Uxbridge High School, among other places. For rail, the closest station is West Drayton station, about 2.1 miles south of the centre. A little further out are The Chimes (under half a mile north) and Hillingdon Museum and Archives Services (within half a mile north). Open spaces near Uxbridge include Uxbridge Moor and Horse Shoe Bay.
DIY versus a professional finish
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Towns and villages near Uxbridge
Also in Uxbridge
Uxbridge: your questions answered
Is parking a problem for a job in Uxbridge?
Parking in Uxbridge, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
I let a flat near West Drayton station. Can you help?
Yes, we work for landlords and agents. Just phone 07833 053749 or send us an email and tell us about the property, and we’ll give you a clear quote.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and we will quote it together.
Can I paint over the new sealant?
Not if it’s silicone. Tell us your decorating plans and we’ll pick a sealant to suit.
Do I have to be there?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Can you seal over the old sealant?
No. The old sealant always comes out first, so the new sealant bonds properly.
What do you put in the joint?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
What do you need from me for a quote?
Just the basics: the address or postcode, what’s wrong and any access issues. Then ring 07833 053749 or email us.
Why deal with it now?
Choosing the product is half the job. Decorators’ caulk and bathroom silicone are not designed for outside joints that move. An exterior, low-modulus sealant stays flexible in sun and frost. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Uxbridge, the repair is bigger than a sealant job.
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first.
Why choose Mr Mastic in Uxbridge
- A sealant colour to suit the surroundings
- White, clear, grey or coloured to suit, where the product allows
- Anti-fungal silicone where joints get wet
- We never seal over old sealant
Take a look at how sealant jobs are priced or our reviews.
How it works
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for a handful of frames, longer for a whole house. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Preparing for the visit
- Clear the area around the work
- Mention any tricky access
- For indoor joints, keep the area dry beforehand if you can
Get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. When it suits you, phone 07833 053749 or send us an email.