Greater London · England
Glazing & conservatory sealant in Cowley, Greater London
Problem with your glazing joints in Cowley? We remove the old material, prepare the joints and seal them properly.
- Water escaping where a screen meets the wall
- Glazing silicone that has cracked or come away
- Stained, discoloured glazing silicone
Glazing silicone in Cowley, done properly
Our work covers conservatory joints, rooflights and glass panels plus shower screens and the bases of glass balustrades. The old sealant comes out, the joint is cleaned and new silicone goes in. If you have water getting into a conservatory at the joints and glazing silicone that has cracked or come away, we can put it right, whatever the surface.
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 Cowley.
A 12-month guarantee comes as standard, so you are covered after we’ve gone.
- Place
- Cowley (UB8, UB7, UB10)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Can I do it myself?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Landlord and commercial work in Cowley
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured.
Surface by surface
Shower screens
Frameless screens rely on silicone at the base and wall. We renew it without marking the glass.
Glass-to-frame joints
Where glass sits in a frame, silicone keeps water out. A failed bead lets water in.
Quotes for glazing silicone in Cowley
Jobs vary more than people expect. What affects the quote:
- How many rooms, windows or areas are involved
- The number and length of the joints
- Any working-time requirements on site
- How much old sealant there is and how hard it is to remove
Doing several joints on one visit normally makes better use of the time than several visits, so tell us about everything that needs sealing. We will give you a clear price for the lot.
Helping us quote
Photos help, but a description is a good start. Please mention:
- The rough size of the job
- The type of property
- Photos by email, if that is easy
- If someone has resealed it before
Asking for a quote is easy: let us know what needs doing and where and its rough size. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Cowley: your questions answered
I let a flat near West Drayton station. Can you help?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Is parking a problem for a job in Cowley?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint before we leave.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Cowley and the rest of Greater London, along with the rest of our area.
What do you need from me for a quote?
Only a few details: where it is, what you’ve noticed and how we reach it. After that, simply ring 0345 464 0079 or email us.
Do you come to Cowley?
Yes, we do. Our applicators work in Cowley.
Are you ARBOMaster approved?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
What does glazing silicone cost?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Also near Cowley
What else we do in Cowley
What we do, step by step
Once we’re on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours for most jobs. In Cowley, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We find where water is getting in and check whether it’s a sealant joint.
- Old silicone is cut away from the glass and frame without scratching either.
- Surfaces are cleaned with a solvent suited to glass and the frame.
- Glazing silicone suited to the joint is applied and tooled.
- We check the joints and, where safe, run water over them.
Before we arrive
- Let us know about earlier repairs to the joints
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about parking restrictions
Ask for a quote
We don’t publish a price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, ring 0345 464 0079 or drop us an email.
Advice
Leave it or put it right?
Leaks get worse, not better. Water can damage frames, walls, flooring and furniture, so it pays to deal with it early. In a flat in Cowley, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
Why book with us
- Full insurance on every job
- Rated 4.9 stars on Google
- A 12-month guarantee on all work
- 20+ years of sealant experience
Read what affects the cost or what customers say.
What sealant work can’t fix
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- A broken pane or roof panel
- A sealed unit that has misted inside
- A roof that has moved or dropped
If you’re not sure, just call 0345 464 0079 or email us and we will give you a straight answer.
Surfaces we seal
- Glass balustrade bases
- Glass-to-glass joints
- Shower screens
- Glass-to-frame joints
- Conservatory frames
- Rooflights
What glazing silicone looks like in Cowley
With historic houses such as Ickenham Hall (about 2.9 miles north-east) nearby, there’s older building stock in the area around Cowley 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around Church of St Laurence, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Cowley is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. If you look after a building such as Cowley St Laurence CofE Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Cowley is about 2 miles south-west of Hillingdon, in Greater London. Homes, rented property, offices and hotels in Cowley can book us for glazing silicone, old or new, large or small. The work is guaranteed for a year. Cowley is one of 764 places in Greater London we cover. There’s also a page for London, roughly 17 miles from Cowley.
Here we cover the UB8, UB7 and UB10 postcode area for glazing silicone. You’ll find streets such as Iver Lane, High Road and The Avenue. Neighbouring places we cover for glazing silicone include Uxbridge (1 mile north), Yiewsley (1 mile south-east), Hillingdon (2 miles north-east), Thorney (2 miles south) and New Denham (2 miles north). We also work in nearby towns such as City of Westminster (14 miles east), Marylebone (14 miles east), Kensington (12 miles east), Hampstead (13 miles east), Ruislip (5 miles north-east) and Brompton (14 miles east).
Local landmarks in Cowley
Typical jobs here are in homes near The Crown pub, Uxbridge High School and West Middlesex College and the streets around them. The closest station to Cowley is West Drayton station, about 1.3 miles south. Other landmarks nearby include British Airways Heritage Collection (0.7 miles north-west) and The Chimes (1.3 miles north). Open spaces near Cowley include Uxbridge Moor and Northala Fields.