Greater London · England
Glazing Silicone in Finsbury
Glazing silicone for Finsbury, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Leaks where conservatory glass meets the frame
- New silicone smeared over old sealant
- Drips on the inside of a conservatory window
Glazing silicone in Finsbury, done properly
Our work covers conservatory joints, rooflights and glass panels, as well as frameless shower screens and glass balustrade bases. The old sealant comes out, the joint is cleaned and new silicone goes in. Typical jobs include water running down inside the glass and black or yellowed silicone on glass joints, on rooflights, shower screens and conservatory frames.
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 Finsbury.
Each job carries a 12-month guarantee, large or small.
- Place
- Finsbury (EC1V, N1, EC2A)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
How we quote for glazing silicone
For a quick quote, just ask. The main things that affect it are:
- Any mould that needs treating
- How many areas need sealing
- How easy the joints are to reach
- Working hours on commercial sites
What you pay reflects the work, not guesswork. That is why we ask a few questions first.
Helping us quote
To make quoting easier, please include:
- Whether it’s a home or a business
- Any previous sealing or DIY work
- Pictures of the joints, sent by email
- The rough size of the job
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work and give you a clear quote.
Aftercare tips
To keep the joints looking good and working properly:
- Keep harsh solvents off the silicone
- Open vents or windows to let moisture out
- Look over the glazing joints once a year
- Wipe the screen down after showering
Clear the conservatory gutters regularly so water doesn’t back up against the seals. Blocked gutters can push water where it shouldn’t go.
Act on black or lifting silicone early. Once it starts to peel, water gets behind it and the problem grows.
Towns and villages near Finsbury
What else we do in Finsbury
Your questions about glazing silicone in Finsbury
I let a flat near Old Street station. Can you help?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you cover Finsbury for glazing silicone?
Yes, Finsbury is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
Do you guarantee glazing sealant work?
Our one-year guarantee covers every job, glazing sealant included.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Finsbury.
How long does glazing silicone take?
Most jobs take a few hours for most jobs, including the preparation. We’ll confirm how long when we quote.
What do you need from me for a quote?
A short description and the location, plus pictures if you have them. We will ask anything else we need to know.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
When something else is needed
In fairness, there are a few things sealant won’t fix:
- Frames that have decayed or split
- Condensation trapped between two panes
- Cracked or broken glass
If you’re not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer.
Surfaces we seal
- Shower screens
- Glass-to-glass joints
- Rooflights
- Glass-to-frame joints
- Conservatory frames
- Glass balustrade bases
Landlord and commercial work in Finsbury
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
What glazing silicone looks like in Finsbury
Historic houses like Mansion House (about 0.6 miles south) are a reminder that the area around Finsbury 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. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
If you look after a building such as Prior Weston Primary School and Children's Centre, the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Old Street station change hands often, and leaking glazing joints, shower screens or conservatory seals are worth sorting between tenancies. Homes close to Jewin Welsh Presbyterian Chapel include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in.
Finsbury is about 2 miles north of London, in Greater London. Every kind of property in Finsbury is covered for glazing silicone. Every job comes with our one-year guarantee. Our Greater London coverage runs to 764 places, Finsbury among them.
Here we cover the EC1V, N1 and EC2A postcode area for glazing silicone. You will find streets such as Oat Lane, Long Lane and Love Lane, all of which we cover. Being close to the A1 and A501, Finsbury is simple for us to get to. We also cover St Luke's (1 mile north), Barbican Estate (1 mile south), City of London (1 mile south), Bishopsgate (1 mile south-east) and Shoreditch (1 mile east). Further out, we also cover City of Westminster (3 miles west), Kensington (5 miles west), Walthamstow (5 miles north-east), Hampstead (4 miles north-west), Ruislip (14 miles west) and Brompton (4 miles south-west).
Around Finsbury
In Finsbury, that means homes and buildings near Artillery Ground, Barts Health Archives and Charterhouse Square School. Also close by are The Jugged Hare pub (within half a mile south), St Mary-at-Hill (0.9 miles south-east) and Central Foundation Boys' School (under half a mile north-east). There’s a railway station in Finsbury itself: Old Street station. Well-known places in the area include Honourable Artillery Company Museum (within half a mile east) and Gabriel's Wharf (1.2 miles south-west). Green spaces nearby include Barnsbury Wood and Ludgate Hill.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
How the job changes by surface
Glass balustrade bases
Glass balustrades sit in a channel that is often finished with sealant. Failed sealant there lets water collect.
Shower screens
Silicone holds the water in on frameless screens. We renew it without marking the glass.
The process
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and clear up. Most jobs take a few hours, depending on how many joints need doing. In Finsbury, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- First, we trace the leak and check it’s coming through a sealant joint.
- The old sealant is removed from the glass and frame without scratching them.
- Surfaces are cleaned with a solvent suited to glass and the frame.
- We apply a neutral-cure glazing silicone and tool it smooth.
- We check the joints and, where safe, run water over them.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Tell us if parking is tricky
- On commercial sites, let us know about site rules
Ask for a quote
Want a quote for glazing silicone? Please ring 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear price before we start.