Greater London · England
Glazing & conservatory sealant in Hanwell, Greater London
Problem with your glazing joints in Hanwell? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- New silicone smeared over old sealant
- Leaking glazing joints on a rooflight
- Black or yellowed silicone on glass joints
Why it’s worth doing now in Hanwell
Topping up old silicone can look like a fix, but new silicone will not bond to old and water soon finds its way back. Cutting out and resealing properly lasts. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
The cost reflects the work involved, not guesswork. That is why we ask about the job first.
Why Hanwell customers choose us
- 4.9 on Google from 180+ five-star reviews
- Experience in homes, commercial sites and hotels
- You choose the colour before work begins
- A sealant colour to suit the surroundings
See what affects the cost or our reviews.
About our glazing silicone in Hanwell
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 rooflights, glass balustrade bases and shower screens, and people most often call us about silicone pulling away from the glass and new silicone smeared over old sealant.
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, letting in draughts and water.
Big or small, it’s backed by our one-year guarantee in Hanwell and across Greater London.
- Where
- Hanwell (W7, W13, UB2)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Inspect the sealant on glazing annually
- Wipe the screen down after showering
- Keep harsh solvents off the silicone
- Open vents or windows to let moisture out
Clear the conservatory gutters regularly, so water drains away from the joints. Overflowing gutters can cause leaks of their own.
Damp patches, drips and condensation along a joint are worth checking. The cause may be sealant or another part, and we’ll tell you which.
Towns and villages near Hanwell
More services for Hanwell
How we quote for glazing silicone
We do not publish a price list, because no two jobs are the same. What we look at:
- How easy the joints are to reach
- How many areas need sealing
- Any working-time requirements on site
- The product the joint needs
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.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- The rough size of the job
- Any access issues, like height or stairs
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
To get a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
Do you need glazing silicone in Hanwell?
Sunlight breaks sealant down and roof joints get the most sun. Old silicone hardens, cracks and loses its grip on the glass.
Any of these means the joints need attention:
- New silicone smeared over old sealant
- Water tracking down the inner face of the glass
- Cracked silicone between glass panels
- Rooflight joints letting water in
Letting a property close to Hanwell station? Then glazing joints are worth checking at the end of a tenancy, before a small leak grows.
Comparing quotes
- Whether all the old sealant comes out first
- Which colour the sealant will be
- Whether VAT is included
- Who does the work, and how experienced they are
How the visit works
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for most jobs. In Hanwell, 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.
- We cut out the failed silicone, taking care of the glass and frame.
- We clean the joint with a solvent that suits the glass and frame.
- Glazing silicone suited to the joint is applied and tooled.
- The finished joints are checked and, where it’s safe, tested with water.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
Get a quote
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand.
Read more
What sealant work cannot fix
New sealant can’t fix everything, and we will tell you before work begins. It won’t solve:
- Misting between the panes of a double-glazed unit (a failed unit for a glazier)
- A sagging or failing conservatory roof
- Frames that have decayed or split
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Glass-to-glass joints
- Glass-to-frame joints
- Conservatory frames
- Glass balustrade bases
- Shower screens
- Rooflights
Hanwell homes and the weather
In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking. With historic houses such as Pitzhanger Manor (about 1.3 miles east) nearby, there’s older building stock in the area around Hanwell as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Managing a site like St Joseph's Catholic Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as Church of St Mellitus, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Hanwell is about 1 mile west of Ealing, in Greater London. Hanwell gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 764 towns and villages across Greater London, from the larger towns to small villages. For nearby work, see our London page (10 miles or so).
All of W7, W13 and UB2 is covered for glazing silicone, from the main roads to the quietest streets. If you need glazing silicone at a property on Park Road, Green Lane and Felix Road or anywhere close by, we can help. You’ll find Hanwell on the A4001, which makes it straightforward to reach. Other places close to Hanwell include West Ealing (1 mile west), Ealing (1 mile east), Dormers Wells (1 mile north-west), South Ealing (1 mile south-east) and Pitshanger (2 miles north-east). We also work in nearby towns such as London (10 miles east), City of Westminster (8 miles east), Marylebone (8 miles east), Kensington (6 miles east), St Pancras (10 miles east) and Shoreditch (11 miles east).
Near you in Hanwell
In Hanwell, that means homes and buildings near Drayton Manor High School, Cuckoo Schools and Drayton Green. Hanwell has its own railway station: Hanwell station. A little further out are Ealing Hospital (less than half a mile west) and Gunnersbury Park House - Large Mansion (2.3 miles east). Green spaces nearby include Middle Lake and Castlebar Hill.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Questions from Hanwell
Can parking be tricky for a visit in Hanwell?
Parking in Hanwell, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Can you help a landlord with a rental near Hanwell station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or email us with the details for a clear quote.
How long does glazing silicone take?
It depends on the size of the job, but most jobs take a few hours for most jobs. We’ll tell you when we quote.
Will the old sealant be removed?
Yes, always, and completely. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
Do you have insurance?
Yes. We are fully insured.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Hanwell, along with the rest of our area.
How long before the joint can be used?
It depends on the product and the conditions. Before we leave, we will tell you the cure time.