Greater London · England
Glazing & conservatory sealant in Cockfosters, Greater London
Glazing silicone for conservatories, rooflights, glass panels and shower screens for homes and businesses in Cockfosters and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Glass-to-glass joints that have split
- Shower screens leaking along the wall or tray
- Split or lifting silicone on glass
What sealant work can’t fix
We’ll always be straight with you, so here’s what new sealant will not do:
- A sagging or failing conservatory roof
- Misting between the panes of a double-glazed unit (a failed unit for a glazier)
- Leaks from the roof covering or flashing (a roofer’s job)
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before booking.
Where we work in Cockfosters
- Glass-to-glass joints
- Glass-to-frame joints
- Rooflights
- Conservatory frames
- Glass balustrade bases
- Shower screens
Glazing silicone for homes and businesses in Cockfosters
We do not replace glass, and misting between panes means a failed sealed unit. Our work is the sealant joints and that’s often where the water gets in. If you have stained, discoloured glazing silicone and cracked silicone between glass panels, we can help, on glass-to-glass joints, glass-to-frame joints and glass balustrade bases alike.
London has a lot of flats and conversions, where windows are often on upper floors. In a converted house or block, the lease normally says who is responsible for the windows, so it’s worth checking before booking.
We stand behind the work with a one-year guarantee.
- Location
- Cockfosters (EN4, N14)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Cockfosters: your questions answered
Can you help a landlord with a rental near New Barnet station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear price.
Do you cover Cockfosters for glazing silicone?
Yes. We work across London and the South East, and Cockfosters is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
Do you take out the old sealant first?
Yes, always, and completely. New sealant won’t bond properly to old, so the joint is cleaned back first.
What sealant do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Is it messy?
No. The area is protected while we work and cleaned up afterwards.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages.
How do I get a quote for glazing silicone in Cockfosters?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or email us with a short description of the job.
Which silicone is used for glass joints?
We use a neutral-cure glazing silicone that suits the glass and frame. In bathrooms, we use anti-fungal silicone.
Landlords, agents and businesses in Cockfosters
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
How the visit works
All our tools and materials come with us in the van. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours, depending on how many joints need doing. In Cockfosters, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- First we agree the joints to be done.
- We cut away the failed silicone.
- The surfaces are cleaned with a suitable solvent.
- We apply and tool the new silicone.
- We inspect the work and test it where we can.
Before we arrive
- Tell us if parking is tricky
- On commercial sites, let us know about site rules
- Tell us about any water getting in
Getting a quote
For glazing silicone in Cockfosters, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Advice
Why deal with it now?
A quick bead over the old sealant might stop a drip for a while, but silicone doesn’t stick to silicone, and the leak normally returns. A proper reseal is the lasting answer. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Cockfosters, the repair is bigger than the sealant job would have been.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why choose Mr Mastic in Cockfosters
- Sanitary silicone with an anti-fungal additive in wet areas
- Sealant colour chosen to suit
- Approved under the ARBOMaster scheme
- Homes, businesses and hotels
See our cost guide and what customers say.
Looking after it afterwards
After the cure time, these simple habits help:
- Avoid scraping close to the bead
- Clear the conservatory gutters regularly
- Squeegee the shower screen after each use
- Look over the glazing joints once a year
On shower screens, wipe or squeegee after use and let the room air. That slows mould growth on the bead.
A small conservatory leak soon spreads. Water runs along frames and down walls, so get it looked at when you first see it.
What glazing silicone looks like in Cockfosters
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. Historic houses like Wyllyotts Manor (about 3.4 miles north-west) are a reminder that the area around Cockfosters has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
In the older streets around Christ Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Schools such as Trent CofE Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Cockfosters is about 1 mile east of Barnet, in Greater London. For glazing silicone in and around Cockfosters, please phone 0345 464 0079 or email us for a quick quote. We are based in Crawley and cover Greater London. 764 places in Greater London are on our list, large and small. We also work in London, about 11 miles from Cockfosters.
We cover every part of EN4 and N14 for glazing silicone and the streets around it. If you need glazing silicone at a property on Park Road, Grove Road and Bevan Road or anywhere close by, our applicators can take on the job. Cockfosters is on the A111, which makes it straightforward to reach with everything needed for glazing silicone. Neighbouring places we cover for glazing silicone include New Barnet (1 mile south-west), Hadley Wood (1 mile north-west), East Barnet (1 mile south), Oakwood (1 mile south-east) and Osidge (1 mile south-east). Within a short drive, we also cover London (11 miles south), City of Westminster (10 miles south), Marylebone (9 miles south), Kensington (11 miles south), St Pancras (9 miles south) and Shoreditch (9 miles south).
What’s near Cockfosters
Typical jobs here are in homes near The Cock Inn, Trent School Cockfosters and Belmont Open Space and the streets around them. The closest station to Cockfosters is New Barnet station, roughly 0.8 miles west. A little further out are Francis Skaryna Belarusian Library and Museum (2.8 miles south-west) and Chase Farm Hospital (2.5 miles north-east). For a walk, there’s Covert Way and Darland's Lake.
Towns and villages near Cockfosters
More services for Cockfosters
Do you need glazing silicone in Cockfosters?
Heat and cold make glass and frames move at different rates. Over years, that movement tears the silicone.
The problems people usually mention when they call are:
- Water running down inside the glass
- Split or lifting silicone on glass
- Shower screens leaking along the wall or tray
- New silicone smeared over old sealant
Cockfosters is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
What your quote should include
- How much experience the applicator has
- How long the guarantee is
- How hidden problems are handled
- Is VAT in the price?