Greater London · England
Glazing & conservatory sealant in Pinner, Greater London
Glazing silicone in Pinner from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Rooflight joints letting water in
- Failed joints on frameless glass
- Water getting into a conservatory at the joints
What sealant work cannot fix
A few problems are outside what sealant work can do:
- A roof that has moved or dropped
- A frame that needs repairing or replacing
- Condensation trapped between two panes
If you are not sure, just phone 0345 464 0079 or email us and we will give you a straight answer before booking.
Joints and surfaces we work on
- Rooflights
- Shower screens
- Glass-to-frame joints
- Conservatory frames
- Glass balustrade bases
- Glass-to-glass joints
Glazing silicone in Pinner, done properly
We renew glazing silicone on conservatories, rooflights and glass panels plus shower screens and the bases of glass balustrades. The old sealant comes out, the joint is cleaned and new silicone goes in. We’re often asked to deal with glazing silicone that has cracked or come away and mouldy sealant around glass panels, across shower screens, glass-to-glass joints and conservatory frames.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in.
Big or small, you get the same 12-month guarantee in Pinner and across Greater London.
- Location
- Pinner (HA5)
- Region
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Towns and villages near Pinner
More services for Pinner
Frames and glazing around Pinner
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. Historic houses like Headstone Manor (about 1.5 miles east) are a reminder that the area around Pinner has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For site and facilities teams at buildings such as West Lodge Primary School, the mastic around its windows and doors needs looking after like any other building’s. In the older streets around Christian Science Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Pinner is about 1 mile north-east of Ruislip, in Greater London. Pinner gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Pinner is one of 764 towns and villages in Greater London where we work. You can also see our page for London, about 14 miles away.
Every address in HA5 is covered for glazing silicone, from the main roads to the quietest streets. If you need glazing silicone at a property on Love Lane, Tudor Road and Marsh Road or a nearby road, our applicators can take on the job. We also cover the places around Pinner: Pinner Green (1 mile north-west), Eastcote (1 mile south), North Harrow (1 mile south-east), Roxbourne (1 mile south) and Rayners Lane (2 miles south-east). Larger places within reach include London (14 miles south-east), City of Westminster (12 miles south-east), Marylebone (12 miles south-east), Kensington (10 miles south-east), St Pancras (13 miles east) and Shoreditch (14 miles east).
Local landmarks in Pinner
Typical jobs here are in homes near Pinner High School, Heathfield School and The Oddfellows Arms, among other places. The closest station to Pinner is Hatch End station, about 1.4 miles north-east. Well-known places in the area include Northwood and Pinner Cottage Hospital (1.3 miles north-west) and St. George's Shopping Centre (2.3 miles east). Green spaces nearby include Horse Shoe Bay and Northala Fields.
Why deal with it now?
Replacing a conservatory roof is major work. Where the water is getting in through sealant, resealing is far simpler. If the roof is the problem, we’ll say so. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Pinner, the repair is bigger than the sealant job would have been.
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why us?
- Any old sealant cut out fully, not covered over
- 180+ five-star Google reviews
- White, clear, grey or another colour, product permitting
- A 12-month guarantee on all work
Pinner: your questions answered
Is parking a problem for a job in Pinner?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
I let a flat near Hatch End station. Can you help?
Yes, we work for landlords and letting agents. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used before we leave.
How do I get a quote for glazing silicone in Pinner?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Should I try DIY first?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we’ve been doing sealant work for more than 20 years.
Do you seal glass balustrade bases?
Yes, we reseal the joint at the base channel. Fitting glass is a separate trade.
Why not top up the existing silicone?
Many leaks we see come from exactly that. We remove the old silicone, clean the joint and reseal.
The process
Every visit runs the same way: we check the joints, protect the area around them, do the work and tidy away. It generally takes a few hours, depending on how many joints need doing. In a London area like Pinner, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We find where water is getting in and check whether it’s a sealant joint.
- We cut out the failed silicone, taking care of the glass and frame.
- The glass and frame are cleaned and degreased.
- We apply a neutral-cure glazing silicone and tool it smooth.
- The finished joints are checked and, where it’s safe, tested with water.
How to prepare
- On commercial sites, let us know about site rules
- Clear the area around the work
- Let us know about parking restrictions
How to get a quote
To get a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will send you a clear quote before any work starts.
Related advice
What affects the cost of glazing silicone
Your quote is based on your job. We look at:
- How much old sealant there is and how hard it is to remove
- Any working-time requirements on site
- The size of the job
- How easy the joints are to reach
What it costs depends on the amount of work, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
What to tell us for a quote
What to tell us when you ask for a quote:
- Whether it’s a home or a business
- Where the property is
- Roughly how big the job is
- Any previous sealing or DIY work
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work before giving you a price.
Aftercare tips
After the cure time, these simple habits help:
- Avoid strong solvents on or near the sealant
- Use a gentle glass cleaner and a soft cloth
- Run a squeegee over the glass when you are done
- Clear the conservatory gutters regularly
Follow the cure time we give you before the joints get wet so the silicone can set properly. From then on, a mild glass cleaner is all it needs.
Do not leave lifting or mouldy silicone on glazing. Peeling silicone lets water in behind and the problem grows.
When to call us in Pinner
New silicone over old silicone will not bond. Many failed joints we see have been topped up rather than cut out leaving a path for water.
Most people get in touch after spotting one of these:
- Failed sealant around rooflight glass
- Mouldy sealant around glass panels
- Water tracking down the inner face of the glass
- Leaks from the base of a shower screen
For landlords with property near Hatch End station, leaking glazing joints, shower screens or conservatory seals are worth sorting between tenancies.
What to look for in a quote
- What happens if the job turns out different
- Which colour the sealant will be
- Is VAT in the price?
- The length of the guarantee
DIY versus a professional finish
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.