Greater London · England
Glazing Silicone in Blackfriars
Glazing silicone for conservatories, rooflights, glass panels and shower screens for homes and businesses in Blackfriars and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Leaking glazing joints on a rooflight
- Water escaping where a screen meets the wall
- Failed joints on frameless glass
Blackfriars: your questions answered
Is parking a problem for a job in Blackfriars?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Can you do glazing silicone in Blackfriars?
Yes, Blackfriars is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or email us and tell us what needs doing.
Which silicone is used for glass joints?
Glass needs a sealant made for glazing. We use neutral-cure glazing silicone with anti-fungal products in bathrooms.
Is there any odour?
Possibly a little. It fades as the sealant cures.
How long will you be here?
It depends on the size of the job, but most jobs take anything from an hour or two to most of a day, depending on the size of the job. We will give you a better idea when we quote.
Are you fully insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Blackfriars, along with the rest of our area.
How do I get a quote for glazing silicone in Blackfriars?
Every job is different, so each one gets its own quote. For a quick quote, call 0345 464 0079 or send us an email with a short description of the job.
Glazing silicone in Blackfriars, done properly
Glass, frames and walls all move at different rates, and the silicone between them takes the strain. When it cracks or lets go, water gets in. We cut it out and reseal with a glazing silicone suited to the joint. We work on rooflights, glass-to-frame joints and glass-to-glass joints, and the jobs we see most are sealant that was laid over old silicone and failed and water getting into a conservatory at the joints.
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, which is when draughts and damp patches appear in homes in Blackfriars.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Where
- Blackfriars (SE1, EC1M, EC1N)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Towns and villages near Blackfriars
What else we do in Blackfriars
What we do, step by step
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours, depending on how many joints need doing and we leave things clean and tidy. For a job in Blackfriars, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We start by finding the leak and making sure sealant is the cause.
- The old sealant is removed from the glass and frame without scratching them.
- We clean the joint with a solvent that suits the glass and frame.
- New glazing silicone goes in and is tooled to a neat finish.
- The finished joints are checked and, where it’s safe, tested with water.
Before we arrive
- On commercial sites, let us know about site rules
- Mention any parking rules near the property
- Tell us about any water getting in
Ask for a quote
Want a quote for glazing silicone? Please phone 0345 464 0079 or email us with a few details. We will explain what we’d do and give you a clear quote before work begins.
Advice
Do you need glazing silicone in Blackfriars?
Glass and frames expand and contract with the temperature, and they do not move by the same amount. Over years, that movement tears the silicone.
Common reasons people contact us are:
- Leaks from the base of a shower screen
- Sealant that was laid over old silicone and failed
- Black or yellowed silicone on glass joints
- Glass-to-glass joints that have split
Managing a site like Mercers' School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- How the joint is cleaned and prepared
- How hidden problems are handled
- Whether they seal over old material or remove it
- Are they insured?
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
How we quote for glazing silicone
Your quote is based on your job. We look at:
- Working hours on commercial sites
- The type of sealant required
- The number of rooms or windows
- The old material and how stubborn it is
Doing several joints on one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Asking for a quote
When you call or email, these details help:
- A few photos by email, if you can
- How we’d reach the joints
- The problem you’ve noticed
- Whether it’s a home or a business
To get a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. We will give you a clear quote before any work starts.
What happens if it’s left?
Fixing a leaking screen early protects what’s underneath. A small leak can reach the floor below before you notice. In London conversions, one flat’s bathroom is often above another flat’s ceiling, 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 for homes in Blackfriars.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What you get with us
- 12-month guarantee on every job
- 180+ five-star Google reviews
- Anti-fungal silicone where joints get wet
- Old sealant always removed completely
Take a look at how sealant jobs are priced or what customers say.
Windows and doors in Blackfriars
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before booking. With historic houses such as Dr Johnson's House (about 0.2 miles north-west) nearby, there’s older building stock in the area around Blackfriars as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Blackfriars is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. If you live in an older home near St Ann Blackfriars, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Blackfriars is about 1 mile north-west of London, in Greater London. Wherever you are in the SE1 postcode area, our applicators can take on glazing silicone. Blackfriars is one of 764 towns and villages in Greater London where we work for glazing silicone.
Work in SE1, EC1M and EC1N is quoted and booked the same way as anywhere else. If you need glazing silicone at a property on Oat Lane, Bear Lane and Shoe Lane or anywhere close by, our applicators can take on the job. Blackfriars is on the A4 and A40, which makes it straightforward to reach. If you’re just outside Blackfriars, we cover Temple (1 mile west), Temple Bar (1 mile west), Bankside (1 mile south-east), Smithfield (1 mile north) and Clare Market (1 mile west). Larger places within reach include Kensington (4 miles west), Walthamstow (6 miles north-east), Hampstead (4 miles north-west), Ruislip (14 miles west), Brompton (3 miles south-west) and Stockwell (3 miles south).
Local landmarks in Blackfriars
Around Blackfriars, our work takes us to homes and buildings near Barts Health Archives, St Mary-at-Hill and St Alban's Church of England Primary School and the streets around them. You will also find Bernie Spain Gardens (under half a mile south-west), London Nautical School (0.5 miles south-west) and The Black Friar pub (under half a mile south-east). There’s a railway station in Blackfriars itself: London Blackfriars station. Well-known places in the area include Montfichet's Tower (within half a mile north-east) and St Brides Crypt Museum (less than half a mile north-west). Green spaces nearby include Barnsbury Wood and St. James's Park Lake.
Landlords, agents and businesses in Blackfriars
We also work for property managers and facilities teams. We can quote a run of properties together.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Different surfaces, different methods
Rooflights
Water around a rooflight isn’t always the sealant. We check which it is.
Conservatory frames
The joints where the conservatory meets the house take a lot of movement. They’re resealed with a suitable sealant.