Greater London · England
Glazing & conservatory sealant in Westbourne, Greater London
Our applicators work in Westbourne on glazing silicone for conservatories, rooflights, glass panels and shower screens. Old material cut out, joints cleaned and sealed neatly.
- Mouldy sealant around glass panels
- Rooflight joints letting water in
- Drips on the inside of a conservatory window
When it is not the sealant
Sealant isn’t the answer to every problem, and we’ll tell you before work begins. It won’t solve:
- Condensation trapped between two panes
- Cracked or broken glass
- A roof that has moved or dropped
If you are not sure, just phone 0345 464 0079 or email us and we will give you a straight answer.
Surfaces we seal
- Glass balustrade bases
- Rooflights
- Conservatory frames
- Glass-to-glass joints
- Shower screens
- Glass-to-frame joints
Glazing silicone in Westbourne
Our work covers conservatory joints, rooflights and glass panels plus shower screens and the bases of glass balustrades. Each joint is cut out, cleaned and resealed. We’re often asked to deal with water running down inside the glass and failed sealant around rooflight glass, across glass-to-glass joints, conservatory frames and glass-to-frame joints.
Many London homes are flats, with windows high above the street. Who looks after the outside of the frames can depend on the lease, so check that first.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we’ll put it right.
- Location
- Westbourne (W2, W11, W9)
- Region
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How the job changes by surface
Glass-to-glass joints
Silicone joins glass panels in many frameless designs. We reseal with a suitable glazing silicone.
Conservatory frames
Conservatory frame joints are a common source of leaks. We remove the failed sealant and renew it.
Should I try it myself first?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Signs you need glazing silicone in Westbourne
Sealant laid over old sealant doesn’t last. Many failed joints we see have been topped up rather than cut out, and water gets between the layers.
Keep an eye out for any of the following:
- Glass-to-glass joints that have split
- Water escaping where a screen meets the wall
- Water getting into a conservatory at the joints
- Mouldy sealant around glass panels
For landlords with property near London Paddington station, leaking glazing joints, shower screens or conservatory seals are worth sorting between tenancies.
What your quote should include
- What the cure time is
- What guarantee comes with the work
- What happens if the job turns out different
- What the quote includes, VAT included or not
Places near Westbourne
What else we do in Westbourne
What we do, step by step
At the end, we look at the finished work together and tell you how long to leave it. The visit itself generally takes a few hours, depending on how many joints need doing, depending on the size of the job. In Westbourne, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- First, we trace the leak and check it’s coming through a sealant joint.
- Old silicone is cut away from the glass and frame without scratching either.
- Surfaces are cleaned with a solvent suited to glass and the 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.
Preparing for the visit
- Tell us about any water getting in
- Let us know about earlier repairs to the joints
- Let us know about parking restrictions
Ask for a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job.
Related advice
Common questions in Westbourne
Is parking an issue for glazing silicone in Westbourne?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Do you cover Westbourne for glazing silicone?
Yes, Westbourne is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
What sealant do you use on glazing?
Glass needs a sealant made for glazing. Ours is a neutral-cure glazing silicone with anti-fungal products in bathrooms.
Where are you based?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Can landlords and businesses book you?
Yes. Domestic, commercial and hotel work are all part of what we do, and we are fully insured.
Do you fit new glass or sealed units?
That is not something we do. Misting between panes means the sealed unit has failed and needs replacing by a glazier.
Do you guarantee glazing sealant work?
Our 12-month guarantee applies to every job we do.
How long does the job take?
Most jobs take anything from an hour or two to most of a day, depending on the size of the job, including the preparation. We’ll confirm how long when we quote.
Frames and glazing around Westbourne
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you live in an older home near St Stephen's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you look after a building such as St. Mary of the Angels Catholic Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Westbourne is about 1 mile north of Kensington, in Greater London. Our applicators cover glazing silicone for homes and businesses in Westbourne and nearby, as part of our work across Greater London. Westbourne is one of 764 towns and villages in Greater London where we work for glazing silicone.
Jobs for glazing silicone in W2, W11 and W9 is quoted and booked the same way as anywhere else. We cover properties on Salem Road, Acklam Road and Morgan Road. Westbourne sits on or near the A404 and A4206. Other places close to Westbourne include Westbourne Green (1 mile north-east), Bayswater (1 mile south), Little Venice (1 mile north-east), Maida Vale (1 mile north) and Paddington Green (1 mile east). Larger places within reach include London (5 miles east), St Pancras (3 miles east), Shoreditch (5 miles east), Walthamstow (9 miles north-east), Hoxton (5 miles east) and Whitechapel (5 miles east).
Around Westbourne
In Westbourne, that means homes and buildings near Maida Vale School, Abdus Salam Library and Westminster Academy, among other places. You’ll also find Emslie Horniman's Pleasance (0.8 miles north-west) and Cock and Bottle pub (under half a mile south-west). Westbourne’s nearest station is London Paddington station, roughly 0.8 miles east. Nearby you’ll also find Paddington General Hospital (0.5 miles north) and Greek Orthodox Cathedral Treasury Museum (within half a mile south-east). For a walk, there’s Campden Hill and Greville Place nature reserve.
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Keep scrapers and blades away from the silicone
- Check the silicone on glass every year or so
- Wipe the screen down after showering
- Keep harsh solvents off the silicone
Look over the glazing joints every year or so. Spotting a crack early means a simpler fix, before water gets in.
A leaking shower screen may not show at first. Water can soak into the floor or reach the room below long before you see it.
Why act early in Westbourne
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. 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. Putting it right early is much less trouble for homes in Westbourne.
Combining jobs into one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. We will give you a clear quote for the lot.
Why choose Mr Mastic in Westbourne
- Full insurance on every job
- Homes, businesses and hotels
- 180+ five-star Google reviews
- Colour agreed with you before any work starts
See our cost guide or our reviews.