Greater London · England
Hendon Glazing Silicone
Professional glazing silicone in and around Hendon, with every bit of old sealant taken out first.
- Black or yellowed silicone on glass joints
- Failed joints on frameless glass
- Silicone pulling away from the glass
About our glazing silicone in Hendon
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. We’re often asked to deal with mouldy sealant around glass panels and glass-to-glass joints that have split, across glass-to-frame joints, conservatory frames and glass balustrade bases.
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 Hendon.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Place
- Hendon (NW4, NW9, NW2, NW11)
- Wider area
- Greater London
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Look over the glazing joints once a year
- Avoid scraping close to the bead
- Stick to mild cleaners on glass
- Wipe the screen down after showering
Do not use blades or scrapers near the bead when you clean. A soft cloth or sponge is best.
A small conservatory leak soon spreads. Water runs along frames and down walls so it’s best dealt with straight away.
Nearby places to Hendon
Other services in Hendon
Surface by surface
Shower screens
A screen’s wall joint and tray joint are where leaks start. We reseal both with anti-fungal silicone.
Glass-to-glass joints
Glass-to-glass joints depend entirely on the sealant. The bead needs to be tidy and fully bonded.
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Hendon: your questions answered
Is parking an issue for glazing silicone in Hendon?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Is Hendon in your area for glazing silicone?
Yes, Hendon is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or email us with a few details of the job.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or drop us an email.
Why not top up the existing silicone?
Topping up is a common cause of leaks. We remove the old silicone, clean the joint and reseal.
Do you have insurance?
Yes. We’re fully insured.
Do you remove the old sealant?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Is a special sealant needed for glass?
We pick a glazing silicone to suit the materials. Neutral-cure products suit most glass and frames.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
How it works
At the end, we look at the finished work together and explain the cure time. The visit itself normally takes a few hours, depending on how many joints need doing, 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 Hendon. A visitor permit or a nearby bay makes the visit run more smoothly.
- We look at the glazing and agree which joints need resealing.
- 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
- For business premises, tell us about site rules or sign-in
- Mention any parking rules near the property
- Keep children and pets away from the work area
Ask for a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work.
Related advice
What we cannot put right
Before booking, it’s worth knowing the limits too:
- A sagging or failing conservatory roof
- Condensation trapped between two panes
- Failed flashing around a conservatory
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly before booking.
What we seal
- Glass balustrade bases
- Conservatory frames
- Rooflights
- Glass-to-glass joints
- Glass-to-frame joints
- Shower screens
Leave it or put it right?
You do not need new glazing because the sealant has gone. Sound glass and frames normally just need resealing. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why choose Mr Mastic in Hendon
- Neat joints and a tidy finish
- We are fully insured
- ARBOMaster approved applicator
- White, clear, grey or coloured to suit, where the product allows
See our cost guide or what customers say.
When to call us in Hendon
Heat and cold make glass and frames move, and they do not move by the same amount. In time, the sealant splits or pulls away.
Keep an eye out for any of the following:
- Black or yellowed silicone on glass joints
- Glazing silicone that has cracked or come away
- Conservatory leaks at frame and glazing joints
- Water tracking down the inner face of the glass
For site and facilities teams at buildings such as Hendon School, its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- Whether all the old sealant comes out first
- Which colour the sealant will be
- How long to leave it before use
- Whether the sealant suits the joint
Glazing silicone in Hendon: local notes
Historic houses like Heath Hall (about 2.3 miles east) are a reminder that the area around Hendon 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 a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking.
Hendon is in London, so parking needs planning: let us know about parking bays, permits or a driveway. Letting a property close to Hendon station? Then glazing joints are worth checking at the end of a tenancy, before a small leak grows.
Hendon is about 3 miles north-west of Hampstead, in Greater London. Hendon gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Hendon is one of 764 places in Greater London we cover for glazing silicone. Our London page covers work nearby, about 8 miles away.
Here we cover the NW4, NW9, NW2 and NW11 postcode area for glazing silicone. If you need glazing silicone at a property on Church Road, Station Road and Sydney Grove or a nearby road, we can help. Hendon sits on or near the A5 and A41, so getting to you is simple. We also cover the places around Hendon: The Burroughs (1 mile north-west), Brent Cross (1 mile south), Staples Corner (1 mile south), West Hendon (1 mile west) and The Hyde (1 mile west). Within a short drive, we also cover London (8 miles south-east), City of Westminster (6 miles south-east), Marylebone (6 miles south-east), Kensington (6 miles south), St Pancras (6 miles south-east) and Shoreditch (7 miles south-east).
Landmarks near Hendon
Typical jobs here are in homes near Hasmonean Primary School, The White Bear pub and Kisharon College. Hendon’s nearest station is Hendon station, about 0.7 miles south-west. Nearby you’ll also find Brent Cross Shopping Centre (0.5 miles south) and St Andrew's Hospital (1.6 miles south). For a walk, there’s Darland's Lake and Parliament Hill.