Greater London · England
Glazing & conservatory sealant in Downham, Greater London
Glazing silicone for Downham, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Water tracking down the inner face of the glass
- Rooflight joints letting water in
- Split or lifting silicone on glass
How it works
We bring everything the job needs with us, so you do not need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. Most jobs take anything from an hour or two to most of a day, depending on the size of the job. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Downham. A visitor permit or a nearby bay makes the visit run more smoothly.
- First we agree the joints to be done.
- We cut away the failed silicone.
- The surfaces are cleaned with a suitable solvent.
- We apply and tool the new silicone.
- We inspect the work and test it where we can.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Mention any parking rules near the property
- Keep children and pets away from the work area
Ask for a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. Whenever you’re ready, phone 0345 464 0079 or email us.
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Glazing silicone for homes and businesses in Downham
Glazing silicone that has yellowed, blackened or come away spoils the look and lets water in. It comes off cleanly, without marking the glass and reseal the joint. We work on glass-to-glass joints, glass balustrade bases and conservatory frames, and the jobs we see most are leaks where conservatory glass meets the frame and mouldy sealant around glass panels.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. The mastic around them dries out and cracks with age, letting in draughts and water.
You are covered for a year from the day we finish. If anything is not right with it, call 0345 464 0079 or email us.
- Place
- Downham (BR1, SE6, SE12)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Towns and villages near Downham
What else we do in Downham
Do you need glazing silicone in Downham?
New silicone over old silicone will not bond. Plenty of leaks come from a quick top-up over the old bead, and water gets between the layers.
People normally contact us after spotting something like this:
- Leaks from the base of a shower screen
- Glass-to-glass joints that have split
- Water tracking down the inner face of the glass
- A quick top-up bead that didn’t last
Rented homes near Grove Park station change hands often, and leaking glazing joints, shower screens or conservatory seals are worth sorting between tenancies.
What your quote should include
- What happens if they find a problem under the old sealant
- What insurance they hold
- Whether the sealant suits the joint
- Which colour the sealant will be
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Wipe the screen down after showering
- Keep harsh solvents off the silicone
- Keep conservatory gutters clear of leaves
- Do not use a blade near the sealant
Check the joints once a year. Catching a split early keeps the repair small.
Don’t leave lifting or mouldy silicone on glazing. Once it starts to peel, water gets behind it and the problem grows.
Questions from Downham
Is Downham in your area for glazing silicone?
Yes. We work across London and the South East, and Downham is part of that. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll give you a clear price.
Can you help a landlord with a rental near Grove Park station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Is it enough to run a bead over the old sealant?
New silicone won’t bond to old silicone, so a top-up soon lets water through. We cut out the old sealant first.
Where do you work from?
Mr Mastic is based in Crawley. We cover Downham and the rest of Greater London.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Do you reseal glass shower screens?
Yes. We cut out the old silicone and reseal the glass-to-wall and glass-to-tray joints.
Can you reseal the base of a glass balustrade?
Yes. The sealant joint at the base can be renewed. Fitting glass is a separate trade.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Why deal with it now?
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. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
No two jobs are quite the same, 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.
What you get with us
- One-year guarantee on every job
- Sanitary silicone with an anti-fungal additive in wet areas
- 4.9 on Google from 180+ five-star reviews
- You choose the colour before work begins
Windows and doors in Downham
With historic houses such as Bromley Palace (about 1.7 miles south-east) nearby, there’s older building stock in the area around Downham 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 is traditional sand mastic. In London conversions and blocks, the lease decides who is responsible for the frames, so check that before booking.
In the older streets around St Barnabas, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Downham is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Downham is about 2 miles north of Bromley, in Greater London. Downham gets the same service as everywhere we cover: old sealant removed completely, careful preparation 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, about 7 miles away.
Work in BR1, SE6 and SE12 is quoted and booked the same way as anywhere else. Local streets include Shaw Road, Arcus Road and Brook Lane, and we cover them all. Neighbouring places we cover for glazing silicone include Plaistow (1 mile south), Grove Park (1 mile north-east), Sundridge (1 mile south-east), Chinbrook (1 mile east) and Bellingham (1 mile west). We also work in nearby towns such as London (7 miles north-west), City of Westminster (9 miles north-west), Marylebone (9 miles north-west), Kensington (10 miles north-west), St Pancras (9 miles north-west) and Shoreditch (8 miles north-west).
Around Downham
In Downham, that means homes and buildings near Holy Trinity College Bromley, Downham Fields and Bonus Pastor Catholic College and the streets around them. For rail, the closest station is Grove Park station, about 0.8 miles north-east of the centre. A little further out are The Glades (1.6 miles south) and Greenwich Castle (3.6 miles north). Green spaces nearby include Summer Hill and Downham Woodland Walk.
When something else is needed
Before booking, it’s worth knowing the limits:
- Leaks from the roof covering or flashing (a roofer’s job)
- Frames that have decayed or split
- A broken pane or roof panel
If you’re not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer.
Surfaces we seal
- Glass-to-glass joints
- Shower screens
- Glass-to-frame joints
- Conservatory frames
- Glass balustrade bases
- Rooflights
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
DIY sealant or a professional job?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.