Greater London · England
Glazing Silicone in Merton Park
Glazing silicone across Merton Park and nearby, with old sealant always removed completely and a 12-month guarantee.
- Failed sealant around rooflight glass
- New silicone smeared over old sealant
- Water tracking down the inner face of the glass
How we handle glazing silicone in Merton Park
Glass replacement isn’t something we do and a misted double-glazed unit needs a glazier. What we do is the silicone around the glass and that is often where the water gets in. If you are dealing with new silicone smeared over old sealant and drips on the inside of a conservatory window, we can put it right.
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.
You are covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or send us an email.
- Location
- Merton Park (SW19, SW20, SM4)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Common questions in Merton Park
Can parking be tricky for a visit in Merton Park?
Parking in Merton Park, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
I let a flat near South Merton station. Can you help?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
Is it possible to redo the silicone on a shower screen?
Yes. We cut out the old silicone and reseal the glass-to-wall and glass-to-tray joints.
Where is Mr Mastic based?
We are a Crawley-based firm. We work across South East England, London and Scotland.
Do you fit new glass or sealed units?
That’s not something we do. Misting between panes means the sealed unit has failed, and a glazier needs to replace it.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we’re fully insured.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Do not use a blade near the sealant
- Open vents or windows to let moisture out
- Check the gutters above the glazing for debris
- Use gentle products around the joints
Gentle products are best near the sealant. Harsh solvents may damage the bead.
Act on black or lifting silicone early. Once it starts to peel, water gets behind it and the problem grows.
What glazing silicone looks like in Merton Park
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you look after a building such as Merton Park Primary School, its window and door frames need their mastic kept sound, just like a home’s. In the older streets around St Mary's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Merton Park is about 1 mile south-east of Wimbledon, in Greater London. For glazing silicone in and around Merton Park, please ring 0345 464 0079 or email us for a quick quote. We are based in Crawley and cover Greater London. 764 places in Greater London are on our list. There’s also a page for London, about 8 miles away.
Jobs for glazing silicone in SW19, SW20 and SM4 is quoted and booked the same way as anywhere else. We cover properties on Mina Road, Manor Road and Cecil Road and the roads around them. Nearby, we also carry out glazing silicone in Wimbledon Chase (1 mile west), Bushey Mead (1 mile west), Cannon Hill (1 mile south-west), Wimbledon (1 mile north-west) and Crooked Billet (1 mile north-west). Larger places within reach include London (8 miles north-east), City of Westminster (7 miles north), Marylebone (8 miles north), Kensington (6 miles north), St Pancras (9 miles north-east) and Shoreditch (10 miles north-east).
Local landmarks in Merton Park
Typical jobs here are in homes near Wibbas Down Inn, Morden Hall Park and Wimbledon School of Art and the streets around them. The closest station to Merton Park is South Merton station, about 0.5 miles south of the centre. Other landmarks nearby include St George's Hospital (1.6 miles north-east) and Southside Wandsworth (3.1 miles north). Open spaces near Merton Park include Merton Park Green Walks and Henman Hill.
Do you need glazing silicone in Merton Park?
UV light ages silicone and roof joints get the most sun. It goes brittle, cracks and stops sticking to the glass and frame.
Signs it’s time to call us include:
- Split or lifting silicone on glass
- Shower screens leaking along the wall or tray
- Water running down inside the glass
- Failed joints on frameless glass
If you let a flat or house near South Merton station, a shower screen or conservatory joint that leaks is easier to reseal while the property is empty.
Comparing quotes
- How the surfaces are prepared before sealing
- What guarantee comes with the work
- Whether you can choose the colour
- Whether the sealant suits the joint
When something else is needed
We won’t take on work that won’t last, so here’s what sealant cannot put right:
- A roof that has moved or dropped
- Leaks from the roof covering or flashing (a roofer’s job)
- Frames that have decayed or split
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
What we seal
- Conservatory frames
- Glass balustrade bases
- Glass-to-frame joints
- Rooflights
- Shower screens
- Glass-to-glass joints
The process
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, 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 Merton Park, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- We start by finding the leak and making sure sealant is the cause.
- Old silicone is cut away from the glass and frame without scratching either.
- We clean the joint with a solvent that suits the glass and frame.
- Glazing silicone suited to the joint is applied and tooled.
- We look over every joint and, where we can, test it with water.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Mention if the joints have been sealed before
- Let us know about parking restrictions
Getting a quote
For glazing silicone in Merton Park, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Read more
Landlord and commercial work in Merton Park
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Towns and villages near Merton Park
What else we do in Merton Park
Leave it or put it right?
A quick bead over the old sealant might stop a drip for a while, but silicone doesn’t stick to silicone, and the leak normally returns. A proper reseal is the lasting answer. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Merton Park, the repair is bigger than a sealant job.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part.
What you get with us
- An ARBOMaster approved applicator
- Anti-fungal sanitary silicone in wet areas
- You choose the colour before work begins
- A sealant colour to suit the surroundings
See our cost guide and customer reviews.