Greater London · England
Longlands Glazing Silicone
Specialist glazing silicone for Longlands: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Water running down inside the glass
- Conservatory leaks at frame and glazing joints
- Leaks from the base of a shower screen
How it works
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before any work begins. Most jobs 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. If the building has a concierge, managing agent or access rules, tell us when you book.
- We trace the leak and confirm it’s a sealant joint.
- 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.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Let us know about stairs, lifts or work at height
- For business premises, tell us about site rules or sign-in
Ask for a quote
Asking for a quote is easy: tell us what needs doing and where and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.
Advice
About our glazing silicone in Longlands
We renew glazing silicone on conservatories, 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. Common call-outs are for leaking glazing joints on a rooflight and water escaping where a screen meets the wall, across glass-to-glass joints, conservatory frames and rooflights.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Longlands as anywhere.
The work is covered for a year after we finish. If anything isn’t right with it, call 0345 464 0079 or drop us an email.
- Location
- Longlands (DA15, DA14, SE9)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Longlands homes and the weather
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Longlands is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. For landlords with property near New Eltham station, leaking glazing joints, shower screens or conservatory seals are worth sorting between tenancies.
Longlands is about 1 mile west of Sidcup, in Greater London. Homes, rented property, offices and hotels in Longlands can book us for glazing silicone. Every job comes with our 12-month guarantee. Across Greater London, we cover 764 places, and Longlands is one of them. For nearby work, see our London page (9 miles or so).
All of DA15, DA14 and SE9 is covered for glazing silicone, from the main roads to the quietest streets. That includes homes and businesses on Main Road, Alder Road and Sidcup Road and the roads around them. Longlands is on the A211, which makes it straightforward to reach. If you’re just outside Longlands, we cover Foxbury (1 mile south), New Eltham (1 mile north-west), Chislehurst (1 mile south-west), Coldharbour (1 mile west) and Blackfen (1 mile north). Within a short drive, we also cover London (9 miles north-west), City of Westminster (12 miles north-west), Marylebone (12 miles north-west), Kensington (13 miles west), St Pancras (11 miles north-west) and Shoreditch (10 miles north-west).
What’s near Longlands
Around Longlands, our work takes us to homes and buildings near Waring Park, Chislehurst School for Girls and Ye Olde Black Horse Inn and the streets around them. The nearest railway station is New Eltham station, roughly 0.8 miles north-west. Nearby you’ll also find Queen Mary's Hospital (1 mile south-east) and Greenwich Castle (5 miles north-west). Open spaces near Longlands include Summer Hill and The Tarn.
What affects the cost of glazing silicone
Your quote is based on your job. We look at:
- The product the joint needs
- How much old sealant there is and how hard it is to remove
- How many rooms, windows or areas are involved
- The amount of work
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, ring 0345 464 0079 or email us for an honest opinion and a quote.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- What’s wrong with the joints now
- The type of property
- Where the job is, and your postcode
- 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 add photos by email if you can.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Act on drips or damp patches early
- Keep air moving in the conservatory
- Clear the conservatory gutters regularly
- Use gentle products around the joints
Keep the new joints dry for as long as we advise so the silicone can set properly. From then on, a mild glass cleaner is all it needs.
Cracked glazing silicone means the joint has failed. Renewing it early keeps it simple, compared with repairing damaged frames or plaster.
What we are called out for in Longlands
Dirt and grease stop silicone sticking. If the glass and frame weren’t cleaned properly the sealant may lift within a few years.
The most common problems we see are:
- Glass-to-glass joints that have split
- A quick top-up bead that didn’t last
- Water escaping where a screen meets the wall
- Stained, discoloured glazing silicone
For an older house near a landmark such as Christ Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Before you book anyone
- What guarantee comes with the work
- How much experience the applicator has
- How hidden problems are handled
- Is the old sealant removed completely?
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
FAQs for Longlands
Can you help a landlord with a rental near New Eltham station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Is parking a problem for a job in Longlands?
Parking in Longlands, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Do you seal glass balustrade bases?
We can, if the base joint is sealed. Photos help us see what’s there.
How much does glazing silicone cost in Longlands?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or email us with a short description of the job.
Where do you work from?
We work from Crawley. We cover Longlands and the rest of Greater London.
Do you cover Longlands?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland, and that includes Longlands.
Landlords, agents and businesses in Longlands
Housing providers, facilities teams and property managers book us too in Longlands and across Greater London. Several sites can be quoted together, and we’re fully insured.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Places near Longlands
Other services in Longlands
How the job changes by surface
Rooflights
Rooflight leaks can come from the sealant or the roof. We check which it is.
Glass balustrade bases
The base joint is cut out and resealed. We don’t install or replace glass.