Greater London · England
Glazing Silicone in Dormers Wells
Glazing silicone across Dormers Wells and nearby, with old sealant always removed completely and a 12-month guarantee.
- A quick top-up bead that didn’t last
- Conservatory leaks at frame and glazing joints
- Failed joints on frameless glass
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Glazing silicone in Dormers Wells, done properly
Many conservatory leaks come down to failed sealant at the glass-to-frame or frame-to-wall joints. We trace the leak to the joint and reseal it and tell you plainly if the cause is something else. We work on rooflights, glass balustrade bases and conservatory frames, and people most often call us about leaking glazing joints on a rooflight and glass-to-glass joints that have split.
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.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Dormers Wells (UB1, UB6, UB2)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
Shower screens
Mouldy or lifting sealant on a screen leaks. Cutting it out and resealing fixes it.
Conservatory frames
Leaks often start where the frame meets the wall. We remove the failed sealant and renew it.
Aftercare tips
Looking after new joints is easy, and it makes a real difference:
- Open vents or windows to let moisture out
- Inspect the sealant on glazing annually
- Use a gentle glass cleaner and a soft cloth
- Avoid scraping close to the bead
Keep the new joints dry for as long as we advise. From then on, a mild glass cleaner is all it needs.
Cracked glazing silicone means the joint has failed. Resealing now is a small job compared with fixing water damage later.
Leave it or put it right?
You don’t need new glazing because the sealant has gone. If the glass and frame are sound, new silicone is often all it takes, and we will tell you if that’s not the case. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
What you get with us
- Anti-fungal sanitary silicone in wet areas
- Fully insured
- Approved under the ARBOMaster scheme
- We leave the area clean and tidy
See our cost guide and what customers say.
Frames and glazing around Dormers Wells
In a converted house or block, who looks after the windows depends on the lease, so check that before booking. Historic houses like Osterley House (about 1.9 miles south) are a reminder that the area around Dormers Wells has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
As a London address, Dormers Wells can be tricky for parking: let us know about parking bays, permits or a driveway. For an older house near a landmark such as Emmanuel Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Managing a site like Dormers Wells Junior School? Then the mastic around its windows and doors needs looking after like any other building’s.
Dormers Wells is about 1 mile north-east of Southall, in Greater London. For glazing silicone in and around Dormers Wells, it’s easy to get a quote: please ring 0345 464 0079 or email us. We cover Greater London from our Crawley base. Dormers Wells is one of 764 places in Greater London where we work. We also work in London, around 12 miles away.
Here we cover the UB1, UB6 and UB2 postcode area for glazing silicone. Local streets include Swan Road, North Road and Meadow Road. Dormers Wells sits on or near the A4020. We also cover Southall (1 mile south-west), West Ealing (1 mile south-east), Hanwell (1 mile south-east), Yeading (2 miles north-west) and Yiewsley (2 miles north-west). We also work in nearby towns such as London (12 miles east), City of Westminster (9 miles east), Marylebone (9 miles east), Kensington (7 miles east), St Pancras (11 miles east) and Shoreditch (12 miles east).
Around Dormers Wells
Typical jobs here are in homes near Dormers Wells High School, The Plough pub and Castle Bar Park, among other places. Dormers Wells’s nearest station is Southall station, roughly 0.9 miles south-west of the centre. A little further out are St Bernard's Hospital (0.9 miles south-east) and Gunnersbury Park House - Large Mansion (3.5 miles east). For a walk, there’s Northala Fields and Litten Nature Reserve.
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- A roof that has moved or dropped
- Failed flashing around a conservatory
- A broken pane or roof panel
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly.
Surfaces we seal
- Rooflights
- Conservatory frames
- Glass-to-frame joints
- Shower screens
- Glass balustrade bases
- Glass-to-glass joints
How the visit works
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes a few hours, depending on how many joints need doing. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Dormers Wells. 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.
- The glass and frame are cleaned and degreased.
- Glazing silicone suited to the joint is applied and tooled.
- The finished joints are checked and, where it’s safe, tested with water.
How to prepare
- Move anything stored near the joints
- For indoor joints, keep the area dry beforehand if you can
- Tell us if parking is tricky
Get a quote
To get a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. You’ll have a clear quote before any work starts.
Advice
Dormers Wells questions
Do you cover Dormers Wells for glazing silicone?
Yes. Our work covers London and the South East, and Dormers Wells is part of that. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we’ll send you a clear quote.
Is parking a problem for a job in Dormers Wells?
Parking in Dormers Wells, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Will resealing stop my conservatory leaking?
That depends where the water is getting in. Failed glazing and frame joints can be resealed, but roof panels and structural problems need a conservatory specialist or roofer.
When is the sealant fully cured?
It depends on the product and the conditions. Before we leave, we’ll tell you the cure time.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures.
Do you work for landlords and businesses?
Yes, regularly. Several properties can go on one quote.
Are you insured?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Can you replace a misted double-glazed unit?
No, our work is the silicone. A glazier replaces glass and units.
Other services in Dormers Wells
What affects the cost of glazing silicone
We quote each job individually. These are the things that affect it:
- How many areas need sealing
- Which sealant suits the joint
- How much there is to do
- Whether the work is at height
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we’ll explain what it covers.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- How many joints, rooms or windows are involved
- Whether it’s a home or a business
- Where the job is, and your postcode
- Whether it has been sealed before
We don’t publish a price list. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or send us an email.