Greater London · England
Dulwich Glazing Silicone
Glazing silicone for Dulwich, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Black or yellowed silicone on glass joints
- Rooflight joints letting water in
- Water getting into a conservatory at the joints
Different surfaces, different methods
Rooflights
Rooflight glazing joints are cut out and renewed. Leaks from the roof itself need a roofer.
Shower screens
Black or peeling silicone on a screen lets water out. Cutting it out and resealing fixes it.
Glazing silicone in Dulwich, done properly
Glazing silicone that has yellowed, blackened or come away looks poor and can leak. We remove it without scratching the glass or frame before the new bead goes in. Typical jobs include conservatory leaks at frame and glazing joints and failed joints on frameless glass, across glass-to-glass joints, glass balustrade bases and glass-to-frame joints.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. The mastic around them dries out and cracks with age, letting in draughts and water.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Dulwich (SE22, SE21, SE23)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
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.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Towns and villages near Dulwich
Also in Dulwich
What affects the cost of glazing silicone
Jobs vary more than people expect. The main factors:
- Access and height
- When we can work, for business premises
- The number and length of the joints
- The old material and how stubborn it is
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
- Any previous sealing or DIY work
- Any access issues, like height or stairs
We do not publish a price list. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or drop us an email.
What we cannot put right
A few problems are outside what sealant work can do:
- Leaks from the roof covering or flashing (a roofer’s job)
- Frames that have decayed or split
- A sealed unit that has misted inside
If you’re not sure, just phone 0345 464 0079 or email us and we will give you a straight answer before you book.
Joints and surfaces we work on
- Shower screens
- Glass balustrade bases
- Glass-to-glass joints
- Rooflights
- Glass-to-frame joints
- Conservatory frames
FAQs for Dulwich
Can you help a landlord with a rental near West Dulwich station?
Yes. We work for landlords and agents as well as homeowners. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Can parking be tricky for a visit in Dulwich?
Parking in Dulwich, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
Do you have insurance?
Yes. We are fully insured, with over 20 years’ experience in sealant work.
Do you work for hotels and businesses?
Yes, regularly. We can plan bigger jobs in stages.
Will you leave a mess?
Tidy work is part of the job. Nearby surfaces are protected, and the area is left clean when we finish.
Do you fit new glass or sealed units?
No. We renew the sealant. Glass and sealed units need a glazier.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Will resealing stop my conservatory leaking?
Often, if the leak is at a sealant joint. We trace the leak first, so you know what you are paying for.
Frames and glazing around Dulwich
In a converted house or block, who looks after the windows depends on the lease, so check that before booking. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as Christ's Chapel of God's Gift, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you look after a building such as St Anthony's Catholic Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Dulwich is about 1 mile south-east of Herne Hill, in Greater London. Anywhere in SE22, we can carry out glazing silicone at your property. Across Greater London, we cover 764 places, Dulwich among them.
All of SE22, SE21 and SE23 is within our area for glazing silicone. If you need glazing silicone at a property on Court Lane, Druce Road and Boxall Road or anywhere close by, we can help. With the A2216 close by, Dulwich is simple for us to get to. Nearby, we also carry out glazing silicone in Dulwich Village (1 mile north-west), West Dulwich (1 mile south), Herne Hill (1 mile north-west), Sydenham Hill (1 mile south-east) and Forest Hill (1 mile east). Larger places within reach include London (4 miles north), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (7 miles north-west), St Pancras (6 miles north) and Shoreditch (6 miles north).
Near you in Dulwich
In Dulwich, that means homes and buildings near The Crown and Greyhound pub, Dulwich Park and Alleyn's School, among other places. For rail, the closest station is West Dulwich station, about 0.7 miles south-west. Nearby you’ll also find Dulwich Community Hospital (0.9 miles north) and Greenwich Castle (4 miles north-east). For a walk, there’s Knight's Hill and Centre for Wildlife Gardening.
How the visit works
When we arrive, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before any work begins. The work normally takes a few hours, depending on how many joints need doing. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Dulwich. It helps if you can point us to a visitor permit or a bay close to the door.
- 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.
- We apply a neutral-cure glazing silicone and tool it smooth.
- The finished joints are checked and, where it’s safe, tested with water.
Before we arrive
- Clear items away from the joints we are working on
- Mention any tricky access
- Tell us if parking is tricky
How to get a quote
Want a quote for glazing silicone? Please phone 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and give you a clear price before we start.
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Landlord and commercial work in Dulwich
We work for landlords and letting agents as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
Common problems we fix in Dulwich
Sealant laid over old sealant does not last. Plenty of leaks come from a quick top-up over the old bead, and water gets between the layers.
If you can see any of these, it’s time to have the joints looked at:
- Leaks where conservatory glass meets the frame
- Black or yellowed silicone on glass joints
- Leaking glazing joints on a rooflight
- Glass-to-glass joints that have split
Rented homes near West Dulwich station change hands often, and a shower screen or conservatory joint that leaks is easier to reseal while the property is empty.
Questions to ask before you book
- Which sealant they’ll use, and why
- Whether they seal over old material or remove it
- How the joint is cleaned and prepared
- Who does the work, and how experienced they are