Greater London · England
Glazing & conservatory sealant in Middle Park, Greater London
Glazing silicone in Middle Park from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Glass-to-glass joints that have split
- Black or yellowed silicone on glass joints
- Leaking glazing joints on a rooflight
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
Glazing silicone in Middle Park
A frameless shower screen depends on its silicone. The joint down the wall and the one along the tray are common leak points, and we reseal both. We work on glass-to-glass joints, shower screens and conservatory frames, and people most often call us about water running down inside the glass and glazing silicone that has cracked or come away.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Middle Park as anywhere.
Your job is guaranteed for a year, as with all our work.
- Place
- Middle Park (SE9, SE12)
- Region
- Greater London
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Honest limits
To be straight with you, there are a few things sealant won’t fix:
- Glass that needs replacing
- Rotten or badly damaged frames
- Water coming through the roof rather than a sealant joint
If you are not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
Surfaces we seal
- Glass-to-frame joints
- Conservatory frames
- Shower screens
- Glass-to-glass joints
- Glass balustrade bases
- Rooflights
Common questions in Middle Park
Is Middle Park in your area for glazing silicone?
Yes. We work across London and the South East, and Middle Park is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Is parking an issue for glazing silicone in Middle Park?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Do you guarantee glazing sealant work?
You get our 12-month guarantee on all our work.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you when we finish.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses, and we’re fully insured.
Do you work for letting agents?
Yes, regularly. We can quote for several properties at once, and between tenancies is a good time for the work.
Where are you based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Landlord and commercial work in Middle Park
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
What affects the cost of glazing silicone
Every job gets its own quote. These are the things that affect it:
- Which sealant suits the joint
- Mould in or behind the old joints
- How many areas need sealing
- Any working-time requirements on site
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
What to tell us for a quote
Before you ask for a quote, have a think about:
- A few pictures by email, if you can
- Any access issues, like height or stairs
- The type of property
- What’s wrong with the joints now
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Windows and doors in Middle Park
In a converted house or block, who looks after the windows depends on the lease, so check that before booking. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Middle Park is in London, so parking needs planning: let us know about parking bays, permits or a driveway. Homes close to Church of St Saviour include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Middle Park is about 1 mile west of Eltham, in Greater London. Wherever you are in the SE9 postcode area, our applicators can take on glazing silicone. Our area takes in 764 places across Greater London. For nearby work, see our London page, about 7 miles away.
We cover every part of the SE9 and SE12 postcode area for glazing silicone and the streets around it. You’ll find streets such as Horsa Road, Court Road and Sidcup Road, all of which we cover. You’ll find Middle Park on the A20, so it’s easy for us to get to. Nearby, we also carry out glazing silicone in Horn Park (1 mile west), Eltham (1 mile east), Mottingham (1 mile south), Well Hall (1 mile north-east) and Chinbrook (1 mile south). Further out, we also cover London (7 miles north-west), City of Westminster (10 miles north-west), Marylebone (9 miles north-west), Kensington (11 miles west), St Pancras (9 miles north-west) and Shoreditch (8 miles north-west).
What’s near Middle Park
Around Middle Park, our work takes us to homes and buildings near Harris Academy Greenwich, Horn Park and The Banker's Draft pub, among other places. For rail, the closest station is Mottingham station, about 0.5 miles south-east of the centre. Nearby you will also find Greenwich Castle (2.9 miles north-west) and Prefab Museum (1.9 miles west). For a walk, there’s Summer Hill and The Tarn.
The process
On the day, we start by going over the job with you. We protect the surfaces around the joints before any work starts. Most jobs take a few hours for most jobs. For a job in Middle Park, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We look at the glazing and agree which joints need resealing.
- Old sealant is removed from the glass and frame.
- The surfaces are cleaned with a suitable solvent.
- We apply and tool the new silicone.
- We inspect the work and test it where we can.
Getting ready for the visit
- Let us know about parking restrictions
- Mention any tricky access
- Tell us about any previous sealing or DIY attempts
How to get a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job.
Related advice
Why act early in Middle Park
Leaks get worse, not better. Water can damage frames, walls, flooring and furniture so early action saves a bigger repair. Converted houses in London often have a bathroom above someone else’s living room, 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.
Leaving a failed joint normally makes the job bigger, not smaller. If you are unsure, phone 0345 464 0079 or email us and we will give you an honest view and a quote.
Why choose Mr Mastic in Middle Park
- 180+ five-star Google reviews
- You choose the colour before work begins
- A sealant colour to suit the surroundings
- Fully insured
When to call us in Middle Park
Sunlight breaks sealant down and roof joints get the most sun. It goes brittle, cracks and stops sticking to the glass and frame.
Look out for any of the following:
- Water getting into a conservatory at the joints
- Drips on the inside of a conservatory window
- Leaks from the base of a shower screen
- Rooflight joints letting water in
Rented homes near Mottingham station change hands often, and glazing joints are worth checking at the end of a tenancy, before a small leak grows.
What your quote should include
- How the joint is cleaned and prepared
- Who does the work, and how experienced they are
- What insurance they hold
- Whether the sealant suits the joint