Greater London · England
Angel Glazing Silicone
Glazing joints in Angel need attention? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Shower screens leaking along the wall or tray
- Mouldy sealant around glass panels
- Water tracking down the inner face of the glass
Glazing silicone for homes and businesses in Angel
Many conservatory leaks come down to failed sealant, where glass meets frame or frame meets wall. We trace the leak to the joint and reseal it and tell you plainly if the cause is something else. We are often asked to deal with a quick top-up bead that didn’t last and failed sealant around rooflight glass, on conservatory frames, glass balustrade bases and glass-to-frame joints.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease normally says who is responsible for the windows, so it’s worth checking before booking.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Place
- Angel (N1, N1P, EC1V)
- Region
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Aftercare tips
Aftercare is simple:
- Don’t leave a drip for the next storm
- Keep scrapers and blades away from the silicone
- Inspect the sealant on glazing annually
- Open vents or windows to let moisture out
Do not use blades or scrapers near the bead when cleaning the glass. A soft cloth or sponge is best.
Don’t leave lifting or mouldy silicone on glazing. Peeling silicone lets water in behind and the leak gets worse.
Why act early in Angel
A new conservatory roof is a big job. Where the water is getting in through sealant, resealing is far simpler. If it’s the roof itself, we will tell you. 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 Angel, the repair is bigger than the sealant job would have been.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why choose Mr Mastic in Angel
- Tidy, careful work
- ARBOMaster approved applicator
- White, clear, grey or another colour, product permitting
- You choose the colour before work begins
Work for landlords, hotels and businesses
Letting agents and landlords in Angel can book us as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
If you manage several properties in or around Angel, several properties can go on one quote. Send us the addresses and the work at each.
The process
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the work takes a few hours, depending on how many joints need doing for a typical job. In a London area like Angel, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We trace the leak and confirm it’s a sealant joint.
- We remove the old sealant carefully.
- The joint is cleaned and degreased.
- We lay the new bead and tool it smooth.
- We check the finished joints and test with water where it’s safe.
How to prepare
- Keep children and pets away from the work area
- Tell us about any previous sealing or DIY attempts
- Move anything stored near the joints
How to get a quote
We quote each job on its own, so start by telling us what you need. Just phone 0345 464 0079 or send us an email with the details and send pictures if you have them.
Advice
Common questions in Angel
I let a flat near London Kings Cross station. Can you help?
Yes. We work for letting agents and landlords as well as householders, and several properties can be quoted together. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear quote.
Do you cover Angel for glazing silicone?
Yes. Our work covers London and the South East, and Angel is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
Are you insured?
Yes. We’re fully insured.
How long does glazing silicone take?
Typically it takes a few hours, depending on how many joints need doing. Larger jobs naturally take longer.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint before we leave.
Can I choose the sealant colour?
Yes. White, clear and grey are common, and other colours are available for many products, and we’ll agree it with you first.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints, and we clear up when we are done.
Is there any odour?
That depends on the sealant. Some smell for a while, some hardly at all.
Nearby places to Angel
What else we do in Angel
What glazing silicone looks like in Angel
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In London conversions and blocks, the lease decides who is responsible for the frames, so check that before booking.
If you live in an older home near St Mark's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Letting a property close to London Kings Cross station? Then glazing joints are worth checking at the end of a tenancy, before a small leak grows.
Angel is about 1 mile north-east of St Pancras, in Greater London. Wherever you are in the N1 postcode area, we can carry out glazing silicone at your property. Across Greater London, we cover 764 places, Angel among them.
All of N1, N1P and EC1V is within our area for glazing silicone. You will find streets such as City Road, Noel Road and Dewey Road, and we cover them all. Being close to the A501, Angel is simple for us to get to. We also cover the places around Angel: Pentonville (1 mile north-east), Clerkenwell (1 mile south), Islington (1 mile north), St Pancras (1 mile south-west) and Kings Cross (1 mile west). Larger places within reach include Kensington (5 miles south-west), Walthamstow (5 miles north-east), Hampstead (3 miles north-west), Ruislip (13 miles west), Brompton (4 miles south-west) and Stockwell (4 miles south).
Landmarks near Angel
Typical jobs here are in homes near Risinghill School, Pilsudski Institute of London and The Angel pub, among other places. Other local landmarks include Barnard Park (within half a mile north-west) and Elizabeth Garrett Anderson School (less than half a mile west). The nearest railway station is London Kings Cross station, about 0.7 miles west of the centre. Well-known places in the area include Finsbury Health Centre (0.5 miles south) and Museum of Funeral History (under half a mile south). Green spaces nearby include Barnsbury Wood and St. James's Park Lake.
When to call us in Angel
Heat and cold make glass and frames move at different rates. Over years, that movement tears the silicone.
Look out for these signs:
- Mouldy sealant around glass panels
- Leaks from the base of a shower screen
- Failed joints on frameless glass
- Leaking glazing joints on a rooflight
For site and facilities teams at buildings such as St John Evangelist RC Primary School, the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- What the cure time is
- Which colour the sealant will be
- What happens if they find a problem under the old sealant
- Which sealant they’ll use, and why
Quotes for glazing silicone in Angel
Some jobs are bigger than they look, and some smaller. The main factors:
- Whether old sealant or filler has to be cut out
- The number of rooms or windows
- Whether there’s mould to deal with
- The number and length of the joints
The cost depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
Helping us quote
What to tell us when you ask for a quote:
- Access, such as stairs, a lift or height
- Pictures of the joints, sent by email
- Whether it’s a home or a business
- Any previous sealing or DIY work
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
What the job involves on each surface
Glass balustrade bases
Balustrade bases are exposed outdoors. Renewing the sealant keeps water out of the channel.
Rooflights
A rooflight faces rain and sun from above. Its sealant ages faster than vertical joints.