Greater London · England
Glazing & conservatory sealant in Sundridge, Greater London
Problem with your glazing joints in Sundridge? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Glazing silicone that has cracked or come away
- Sealant that was laid over old silicone and failed
- Stained, discoloured glazing silicone
Glazing silicone in Sundridge
We renew glazing silicone on conservatories, rooflights and glass panels plus shower screens and the bases of glass balustrades. Each joint is cut out, cleaned and resealed. We work on conservatory frames, shower screens and rooflights, and people most often call us about a quick top-up bead that didn’t last and silicone pulling away from the glass.
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, letting in draughts and water.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Sundridge (BR1, BR7, BR2)
- Region
- Greater London
- Cover
- One year on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Questions from Sundridge
Do you work for landlords with property near Sundridge Park station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.
Can parking be tricky for a visit in Sundridge?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Do you do commercial work?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
Where is Mr Mastic based?
Our base is Crawley. We work across South East England, London and Scotland.
Is a special sealant needed for glass?
A glazing-grade silicone is best. We use neutral-cure glazing silicone and anti-fungal silicone in wet areas.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. Indoors, that normally means someone at home.
Are you fully insured?
Yes. We are fully insured.
Glazing silicone in Sundridge: local notes
In a converted house or block, who looks after the windows depends on the lease, so check that before booking. Historic houses like Bromley Palace (about 0.9 miles south) are a reminder that the area around Sundridge has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Letting a property close to Sundridge Park station? Then glazing joints are worth checking at the end of a tenancy, before a small leak grows. Sundridge is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Sundridge is about 1 mile north-east of Bromley, in Greater London. Our applicators cover glazing silicone for homes and businesses in Sundridge and nearby, as part of our work across Greater London. Across Greater London, we cover 764 places, Sundridge among them. We also work in London, around 8 miles away.
Our applicators cover all of BR1, BR7 and BR2 for glazing silicone and the streets around it. Streets in the area include Hawes Road, North Road and Croft Road, all of which we cover. Neighbouring places we cover for glazing silicone include Plaistow (1 mile west), Grove Park (1 mile north), Downham (1 mile north-west), Chinbrook (1 mile north) and Elmstead (1 mile east). Larger places within reach include London (8 miles north-west), City of Westminster (10 miles north-west), Marylebone (10 miles north-west), Kensington (11 miles north-west), St Pancras (10 miles north-west) and Shoreditch (9 miles north-west).
Local landmarks in Sundridge
In Sundridge, that means homes and buildings near Elmstead Wood, Holy Trinity College Bromley and Haberdashers' Aske's Knights Academy. Sundridge has its own railway station: Sundridge Park station. A little further out are Bromley Hospital (1.4 miles south) and Greenwich Castle (4.4 miles north). Green spaces nearby include Summer Hill and Downham Woodland Walk.
Surface by surface
Glass balustrade bases
The base of a glass balustrade is normally sealed. Failed sealant there lets water collect.
Conservatory frames
Leaks often start where the frame meets the wall. We cut out the old sealant and reseal.
DIY sealant or a professional job?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
For landlords and businesses
If you manage several properties in or around Sundridge, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and pictures by email help.
Housing providers, facilities teams and property managers book us too in Sundridge and across Greater London. Several sites can be quoted together, and we are fully insured.
Why it’s worth doing now in Sundridge
Dealing with a leaking shower screen early protects the floor and ceiling. Water from a failed joint can soak into the floor before you notice. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Why choose Mr Mastic in Sundridge
- White, clear, grey or coloured to suit, where the product allows
- 20+ years of sealant experience
- An ARBOMaster approved applicator
- Colour agreed with you before any work starts
See what affects the cost and our reviews.
What else we do in Sundridge
How the visit works
You do not need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the job takes anything from an hour or two to most of a day, depending on the size of the job in most cases. In a London area like Sundridge, 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 start by finding the leak and making sure sealant is the cause.
- We cut out the failed silicone, taking care of the glass and frame.
- 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.
- We look over every joint and, where we can, test it with water.
Getting ready for the visit
- Mention if the joints have been sealed before
- Mention any sign-in or site rules at work premises
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand.
Advice
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. Our tips:
- Use a gentle glass cleaner and a soft cloth
- Keep air moving in the conservatory
- Get a new leak looked at quickly
- Squeegee the shower screen after each use
Check the joints once a year. Catching a split early keeps the repair small, before water gets in.
Don’t leave lifting or mouldy silicone on glazing. Once it starts to peel, water gets behind it and the leak gets worse.
Signs you need glazing silicone in Sundridge
Not every leak is a sealant problem: failed roof panels, slipped glazing bars and blocked gutters cause them too. We find the cause before we seal anything.
If you can see any of these, it’s time to have the joints looked at:
- Stained, discoloured glazing silicone
- Drips on the inside of a conservatory window
- Conservatory leaks at frame and glazing joints
- Leaks from the base of a shower screen
In the older streets around St Andrew, the joint between an old wall and a newer frame is normally the first place rain gets in.
What to look for in a quote
- What insurance they hold
- What preparation is included
- Who turns up on the day
- Whether the sealant suits the joint