Greater London · England
Finchley Glazing Silicone
Glazing silicone for conservatories, rooflights, glass panels and shower screens for householders, landlords and businesses in Finchley. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Black or yellowed silicone on glass joints
- Shower screens leaking along the wall or tray
- Glass-to-glass joints that have split
How we handle glazing silicone in Finchley
Glazing silicone that has yellowed, blackened or come away looks poor and can leak. We remove it without scratching the glass or frame and reseal the joint. If you are dealing with water tracking down the inner face of the glass and glass-to-glass joints that have split, we can help, on glass balustrade bases, glass-to-glass joints and glass-to-frame joints alike.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. Over the years, the sealant around them shrinks, cracks and pulls away, letting in draughts and water.
The work is covered for a year after we finish. If there’s a problem with it, please call 0345 464 0079 or send us an email.
- Where
- Finchley (N3, N2, N12, NW11)
- Region
- Greater London
- Cover
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
The process
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take anything from an hour or two to most of a day, depending on the size of the job. 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.
- First, we check where the water gets in.
- The failed silicone is cut out without marking the glass or frame.
- We clean the glass and frame so the new silicone bonds.
- A neutral-cure glazing silicone is applied and tooled.
- Each joint is checked and, where possible, water-tested.
Before we arrive
- Keep pets and children clear of the area while we work
- Tell us about any water getting in
- Move anything stored near the joints
Ask for a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll talk you through the work before giving you a price.
Advice
Towns and villages near Finchley
Other services in Finchley
How we quote for glazing silicone
The quote reflects the job in front of us. We take into account:
- Whether the work is at height
- How many rooms, windows or areas are involved
- The size of the job
- Any working-time requirements on site
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first.
Asking for a quote
To make quoting easier, please include:
- The problem you’ve noticed
- The type of property
- Pictures of the joints, sent by email
- If someone has resealed it before
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or email us.
What we are called out for in Finchley
On shower screens, constant water and cleaning products wear silicone. Mould gets into it and the edges begin to peel.
It’s worth asking for a quote if you see:
- Conservatory leaks at frame and glazing joints
- Cracked silicone between glass panels
- Water tracking down the inner face of the glass
- A quick top-up bead that didn’t last
If you look after a building such as Manorside Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- How long to leave it before use
- What insurance they hold
- How the joint is cleaned and prepared
- The length of the guarantee
For landlords and businesses
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
What happens if it’s left?
A leaking joint won’t fix itself. Water can damage frames, walls, flooring and furniture so early action saves a bigger repair. 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 Finchley, the repair is bigger than the sealant job would have been.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Why choose Mr Mastic in Finchley
- Domestic, commercial and hotel work
- We never seal over old sealant
- More than 20 years in sealant work
- ARBOMaster approved applicator
Take a look at our cost guide or our reviews.
What glazing silicone looks like in Finchley
Historic houses like Heath Hall (about 1.8 miles south) are a reminder that the area around Finchley 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. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
For an older house near a landmark such as St Paul's Finchley, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Finchley is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Finchley is about 6 miles north of City of Westminster, in Greater London. We carry out glazing silicone for homes and businesses in Finchley and the surrounding area. Our Greater London coverage runs to 764 places, and Finchley is one of them. Our London page covers work nearby.
Postcode districts we cover here for glazing silicone: N3, N2, N12 and NW11. Streets in the area include Station Road, Chaplin Square and Market Place. Main roads around Finchley include the B1462. We also cover the places around Finchley: Church End (1 mile west), Woodside Park (1 mile north), North Finchley (1 mile north), Friern Barnet (2 miles north-east) and Oakleigh Park (2 miles north). We also work in nearby towns such as London (8 miles south-east), City of Westminster (6 miles south), Marylebone (6 miles south), Kensington (7 miles south), St Pancras (6 miles south-east) and Shoreditch (7 miles south-east).
Near you in Finchley
In Finchley, that means homes and buildings near The Elephant Inn, Bishop Douglass School and Francis Skaryna Belarusian Library and Museum and the streets around them. Nearby too are Victoria Park (within half a mile north) and Woodhouse College (1 mile north-east). The closest station to Finchley is New Southgate station, roughly 1.9 miles north-east. Well-known places in the area include Finchley Memorial Hospital (less than half a mile north-east) and Grand Arcade (1 mile north). For a walk, there’s Highgate Hill and Lakeside Nature Reserve.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Keep harsh solvents off the silicone
- Wipe the screen down after showering
- Look over the glazing joints once a year
- Avoid scraping close to the bead
Clear the conservatory gutters regularly so water doesn’t back up against the seals. Blocked gutters can push water where it shouldn’t go.
Shower screen leaks can go unnoticed. It can damage the floor or the ceiling below before you spot it.
FAQs for Finchley
Do you cover Finchley for glazing silicone?
Yes. We work across London and the South East, and Finchley is part of that. Just call 0345 464 0079 or email us with a few details of the job.
I let a flat near New Southgate station. Can you help?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Should I try DIY first?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Will resealing stop my conservatory leaking?
In many cases, as long as sealant is the cause. We find where the water gets in first before any sealing.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you.
Are you ARBOMaster approved?
Yes. We are an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.