Greater London · England
Glazing & conservatory sealant in New Malden, Greater London
We cover New Malden for glazing silicone for conservatories, rooflights, glass panels and shower screens. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Rooflight joints letting water in
- Split or lifting silicone on glass
- A quick top-up bead that didn’t last
Glazing silicone for homes and businesses in New Malden
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. If you’re dealing with glazing silicone that has cracked or come away and shower screens leaking along the wall or tray, we can help.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. Over the years, the sealant around them shrinks, cracks and pulls away, which is when draughts and damp patches appear in homes in New Malden.
There’s a 12-month guarantee on every job, large or small.
- Location
- New Malden (KT3, KT1, SW20)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
New Malden homes and the weather
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Southside House (about 1.6 miles north-east) nearby, there’s older building stock in the area around New Malden as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
In the older streets around New Malden Baptist Church, the joint between an old wall and a newer frame is normally the first place rain gets in. As a London address, New Malden can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Managing a site like Christ Church New Malden CofE Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
New Malden is about 3 miles south-west of Wimbledon, in Greater London. Every kind of property in New Malden can book us for glazing silicone, old or new, large or small. Every job comes with our 12-month guarantee. We cover 764 towns and villages across Greater London, from the larger towns to small villages. There’s also a page for London, about 10 miles away.
All of KT3, KT1 and SW20 is covered for glazing silicone. Local streets include High Street, Ashcombe Square and Melrose Gardens. Main roads around New Malden include the B283, so getting to you is simple. We also cover the places around New Malden: Motspur Park (1 mile north-east), West Barnes (1 mile east), Norbiton (1 mile north-west), Coombe (1 mile north) and Raynes Park (1 mile east). Larger places within reach include London (10 miles north-east), City of Westminster (9 miles north-east), Marylebone (9 miles north-east), Kensington (7 miles north), St Pancras (11 miles north-east) and Shoreditch (12 miles north-east).
What’s near New Malden
We work in homes and buildings around Beverley Park, The Glasshouse pub and Holy Cross School, among other places. There’s a railway station in New Malden itself: New Malden station. Other landmarks nearby include Chessington Castle Hill (3.3 miles south) and Bentall Centre (1.9 miles west). For a walk, there’s Rose Walk and Kingston Hill Road area.
New Malden questions
Can you help a landlord with a rental near New Malden station?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Can you do glazing silicone in New Malden?
Yes. Our work covers London and the South East, and New Malden is part of that. You can phone 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear quote.
Is a special sealant needed for glass?
We use a neutral-cure glazing silicone that suits the glass and frame. In bathrooms, we use anti-fungal silicone.
Can you replace a misted double-glazed unit?
Glass replacement isn’t our trade. We look after the sealant joints, and we’ll tell you if a unit looks like it has failed.
Are you insured?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Can I add another job to the visit?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Will there be a smell?
Some sealants have a smell while they cure. Opening a window helps.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses, and we’re fully insured.
Why it’s worth doing now in New Malden
Replacing windows or a shower screen isn’t needed for a failed joint. If the glass and frame are sound, new silicone is often all it takes, and we’ll tell you if that’s not the case. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first and give you a clear price before any work starts.
What you get with us
- Old sealant always removed completely
- We’re fully insured
- Arbo and Everbuild products
- One-year guarantee on every job
Take a look at what affects the cost or what customers say.
Looking after it afterwards
Aftercare is simple:
- Check the gutters above the glazing for debris
- Don’t use a blade near the sealant
- Keep harsh solvents off the silicone
- Stick to mild cleaners on glass
Clear the conservatory gutters regularly, so water drains away from the joints. Overflowing gutters can cause leaks of their own.
If silicone on glass has cracked, water is already getting in. Resealing now is a small job, compared with repairing damaged frames or plaster.
What happens on the day
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and clear up. Most jobs take a few hours, depending on how many joints need doing. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents 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.
- We check the finished joints and test with water where it’s safe.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Clear items away from the joints we’re working on
- Let us know about parking restrictions
Get a quote
For a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We’ll send you a clear quote before any work starts.
Read more
Landlord and commercial work in New Malden
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
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.
Can I do it myself?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
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. Everything old must be removed first.
When it isn’t the sealant
Before booking, it’s worth knowing the limits:
- Glass that needs replacing
- A sealed unit that has misted inside
- A frame that needs repairing or replacing
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think.
What we seal
- Glass-to-frame joints
- Rooflights
- Shower screens
- Glass-to-glass joints
- Conservatory frames
- Glass balustrade bases
Quotes for glazing silicone in New Malden
We quote each job individually. This is what makes a difference:
- The number of rooms or windows
- When we can work, for business premises
- The product the joint needs
- How much there is to do
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or send us an email.
Asking for a quote
Before you ask for a quote, have a think about:
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it’s a home or a business
- If someone has resealed it before
- Roughly how big the job is
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you are ready, ring 0345 464 0079 or send us an email.