Greater London · England
Glazing & conservatory sealant in Westminster, Greater London
Our applicators work in Westminster on glazing silicone for conservatories, rooflights, glass panels and shower screens. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Sealant that was laid over old silicone and failed
- Glazing silicone that has cracked or come away
- Stained, discoloured glazing silicone
Work for landlords, hotels and businesses
For anyone letting property in or around Westminster, several properties can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
Landlords and agents in Westminster can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Glazing silicone for homes and businesses in Westminster
Many conservatory leaks come down to failed sealant, where glass meets frame or frame meets wall. We find the joint that is letting water in and renew it, and if it’s something sealant cannot fix, we’ll tell you. If you’re dealing with glass-to-glass joints that have split and water tracking down the inner face of the glass, we can put it right.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out, in Westminster as anywhere.
Each job carries a 12-month guarantee, large or small.
- Location
- Westminster (SW1P, W1J, SW1V)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Why it’s worth doing now in Westminster
Leaks get worse, not better. Left, water can mark floors, damage plaster and rot timber so early action saves a bigger repair. In London conversions, one flat’s bathroom is often above another flat’s ceiling, 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.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Why us?
- Experience in homes, commercial sites and hotels
- Approved under the ARBOMaster scheme
- A 12-month guarantee on all work
- Colour picked to suit the job
Read what affects the cost and our reviews.
How the job changes by surface
Shower screens
Mouldy or lifting sealant on a screen leaks. A full reseal sorts it.
Conservatory frames
Frame joints face sun and rain all year. A fresh bead seals them again.
Towns and villages near Westminster
Other services in Westminster
How the visit works
You don’t need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the job takes a few hours for most jobs for a typical job. For a job in Westminster, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- First we agree the joints to be done.
- We cut away the failed silicone.
- We clean and prepare the joint.
- We apply and tool the new silicone.
- The joints are checked before we leave.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Where the joints are inside, avoid wetting them before we arrive
- Mention any tricky access
How to get a quote
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job, and we will come back to you with a quote.
Related advice
How we quote for glazing silicone
We quote each job individually. This is what makes a difference:
- Working hours on commercial sites
- The old material and how stubborn it is
- The type of sealant required
- The number of rooms or windows
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
What to tell us for a quote
Before you ask for a quote, have a think about:
- How we’d reach the joints
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
- Where the property is
If you’re in Westminster and need glazing silicone, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
What sealant work cannot fix
Some problems need a builder, plumber or other trade rather than us:
- Leaks from the roof covering or flashing (a roofer’s job)
- Misting between the panes of a double-glazed unit (a failed unit for a glazier)
- Cracked or broken glass
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly.
Joints and surfaces we work on
- Rooflights
- Glass-to-glass joints
- Glass balustrade bases
- Glass-to-frame joints
- Conservatory frames
- Shower screens
FAQs for Westminster
Do you work for landlords with property near London Victoria station?
Yes. We work for landlords and agents as well as householders, and several properties can be quoted together. You can ring 0345 464 0079 or email us with the details for a clear quote.
Do you cover Westminster for glazing silicone?
Yes. We work across London and the South East, and Westminster is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you do not need to watch us work.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we’re using.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
Can you just put new silicone over the old?
New silicone will not bond to old silicone, so a top-up soon lets water through. We cut out the old sealant first.
Can a conservatory leak be sealed?
Often, if the leak is at a sealant joint. We find where the water gets in first before any sealing.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Glazing silicone in Westminster: local notes
With historic houses such as Clarence House (about 0.4 miles north-west) nearby, there’s older building stock in the area around Westminster as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
Schools such as Harris Westminster Sixth Form are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to London Victoria station? Then a shower screen or conservatory joint that leaks is easier to reseal while the property is empty. As a London address, Westminster can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Westminster is about 1 mile south-east of City of Westminster, in Greater London. Every kind of property in Westminster can book us for glazing silicone. Every job comes with our 12-month guarantee. Westminster is one of 764 places in Greater London where we work.
Jobs for glazing silicone in SW1P, W1J and SW1V works the same way as everywhere else we cover. That includes homes and businesses on Eaton Lane, Wilton Road and Castle Lane. Westminster is on the A4 and A202, which makes it straightforward to reach. Nearby, we also carry out glazing silicone in Millbank (1 mile north), Victoria (1 mile south-west), Pimlico (1 mile south), Vauxhall (1 mile south-east) and Lambeth (1 mile south-east). Within a short drive, we also cover Kensington (3 miles west), Shoreditch (3 miles north-east), Walthamstow (8 miles north-east), Hoxton (3 miles north-east), Whitechapel (3 miles north-east) and Hampstead (4 miles north-west).
Landmarks near Westminster
Around Westminster, our work takes us to homes and buildings near St Matthew's School, St James's Park and Blewcoat School. Nearby too are London Library (0.6 miles north) and Grafton Arms (under half a mile south). The closest station to Westminster is London Victoria station, about 0.6 miles south-west. Other landmarks nearby include Westminster Hospital (under half a mile east) and The Crime Museum (within half a mile south). Not far away are Barnsbury Wood and St. James's Park Lake.
Can I do it myself?
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.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.