Greater London · England
Glazing & conservatory sealant in Hounslow, Greater London
Glazing silicone for conservatories, rooflights, glass panels and shower screens in Hounslow, with a 12-month guarantee on every job. Call for a quick quote.
- Leaking glazing joints on a rooflight
- Glazing silicone that has cracked or come away
- A quick top-up bead that didn’t last
Glazing silicone for homes and businesses in Hounslow
Glass and frames expand and contract differently, and the silicone between them takes the strain. Once it splits or comes away, water finds a way through. We cut it out and reseal with a glazing silicone suited to the joint. We work on glass-to-frame joints, glass-to-glass joints and shower screens, and the jobs we see most are a quick top-up bead that didn’t last and leaks where conservatory glass meets the frame.
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 Hounslow.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Hounslow (TW13)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
The process
On the day, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work begins. The work usually takes a few hours, depending on how many joints need doing. In Hounslow, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We look at the glazing and agree which joints need resealing.
- We cut away the failed silicone.
- We clean and prepare the joint.
- We apply and tool the new silicone.
- We inspect the work and test it where we can.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Tell us about any previous sealing or DIY attempts
- Mention any leaks or damp you’ve noticed
Ask for a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved before giving you a price.
Read more
What happens if it’s left?
Silicone around glazing needs the right product. A general-purpose tube may not bond well or may react with the frame so we choose a glazing silicone instead. 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.
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and give you a clear price before any work starts.
Why us?
- More than 20 years in sealant work
- Sealant colour chosen to suit
- You choose the colour before work begins
- White, clear, grey or another colour, product permitting
See our cost guide and customer reviews.
Hounslow: your questions answered
Can you help a landlord with a rental near Sunbury station?
Yes. We work for letting agents and landlords as well as homeowners. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Can you do glazing silicone in Hounslow?
Yes, Hounslow is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
Will the old sealant be removed?
Yes, always, and completely. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Is there any odour?
Some sealants have a smell while they cure. Opening a window helps.
Can you just put new silicone over the old?
Silicone doesn’t stick to silicone and water gets between the layers. We cut out the old sealant first.
Which silicone is used for glass joints?
We use a neutral-cure glazing silicone suited to glass and the frame. Shower screens get anti-fungal silicone.
Do I have to be there?
It depends on the job. For work indoors, someone needs to let us in, and for outside work we’ll agree access with you when we book.
Are you insured?
Yes. Mr Mastic is fully insured.
Towns and villages near Hounslow
More services for Hounslow
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
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 doesn’t work out, we can still put it right.
Frames and glazing around Hounslow
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Strawberry Hill House (about 4 miles east) nearby, there’s older building stock in the area around Hounslow as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Schools such as Meadhurst Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. For landlords with property near Sunbury station, leaking glazing joints, shower screens or conservatory seals are worth sorting between tenancies.
Hounslow is about 1 mile north of Sunbury-on-Thames, in Greater London. We provide glazing silicone to householders, landlords and businesses in Hounslow and the surrounding area, as part of our work across Greater London. Our area takes in 764 places across Greater London. London is on our list too, about 15 miles from Hounslow.
Here we cover the TW13 postcode area for glazing silicone. Other places close to Hounslow include Ashford Common (1 mile south-west), Littleton Common (1 mile south-west), Sunbury-on-Thames (1 mile south), Feltham (1 mile north-east) and Bedfont (1 mile north). Within a short drive, we also cover London (15 miles east), City of Westminster (13 miles north-east), Marylebone (14 miles north-east), Kensington (11 miles north-east), St Pancras (15 miles north-east) and Hampstead (14 miles north-east).
Landmarks near Hounslow
Typical jobs here are in homes near Sunbury Park, Sunbury Manor School and Sunbury Manor School, among other places. For rail, the closest station is Sunbury station, about 0.9 miles south-east of the centre. A little further out are Treaty Centre (3.8 miles north-east) and Ashford Hospital (1.9 miles north-west). Open spaces near Hounslow include St Ann's Hill and Staines Reservoirs.
When to call us in Hounslow
Some conservatory leaks aren’t sealant at all: broken panels, roof problems and blocked gutters can all let water in. We find the cause before we seal anything.
Signs it’s time to call us include:
- Failed joints on frameless glass
- Glazing silicone that has cracked or come away
- Failed sealant around rooflight glass
- Drips on the inside of a conservatory window
If you live in an older home near Church of St Dunstan, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before you book
- Whether you can choose the colour
- How the surfaces are prepared before sealing
- What happens if they find a problem under the old sealant
- Whether all the old sealant comes out first
Surface by surface
Shower screens
Black or peeling silicone on a screen lets water out. A full reseal sorts it.
Rooflights
Rooflight leaks can come from the sealant or the roof. We check which it is.
Honest limits
To be straight with you, some problems need a different trade:
- A broken pane or roof panel
- Structural problems with a conservatory roof
- Water coming through the roof rather than a sealant joint
If you’re not sure, just call 0345 464 0079 or email us and we will give you a straight answer.
What we seal
- Shower screens
- Glass-to-frame joints
- Glass-to-glass joints
- Glass balustrade bases
- Conservatory frames
- Rooflights
Landlords, agents and businesses in Hounslow
We work for landlords and agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.