Southampton · England
Glazing & conservatory sealant in Highfield, Southampton
Professional glazing silicone in and around Highfield, with every bit of old sealant taken out first.
- Cracked silicone between glass panels
- Leaks where conservatory glass meets the frame
- Rooflight joints letting water in
Glazing silicone in Highfield
Frameless shower screens rely on sealant to keep water in. The joint down the wall and the one along the tray are common leak points and both get fresh anti-fungal silicone. We’re often asked to deal with cracked silicone between glass panels and drips on the inside of a conservatory window, across rooflights, conservatory frames and shower screens.
Homes around Highfield range from older properties to newer houses, and their windows range just as widely. Each frame material needs the right sealant against the right wall.
You’re covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Place
- Highfield (SO17, SO16, SO14)
- Region
- Southampton
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Windows and doors in Highfield
Highfield is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on glazing joints and frame seals, especially on the side facing the sea. With historic houses such as South Stoneham House (about 1.1 miles north-east) nearby, there’s older building stock in the area around Highfield as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For an older house near a landmark such as Highfield Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Managing a site like Highfield Church of England Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Highfield is about 1 mile north of Southampton, in Southampton. Anywhere in SO17, we cover glazing silicone for homes and businesses. 40 places in Southampton are on our list, from the larger towns to small villages.
Work in SO17, SO16 and SO14 works the same way as everywhere else we cover. Streets in the area include Winn Road, Nile Road and The Avenue, and we cover them all. Being close to the A3035, Highfield is simple for us to get to. Neighbouring places we cover for glazing silicone include Bassett (1 mile north-west), Shirley (2 miles west), Lordswood (2 miles north-west), Freemantle (2 miles south-west) and Coxford (2 miles west). Further out, we also cover Thornhill (3 miles south-east), Harefield (3 miles east), Sholing (3 miles south-east), Woolston (3 miles south), Eling (4 miles west) and Rownhams (3 miles north-west).
What’s near Highfield
We work in homes and buildings around Saint George Catholic Voluntary Aided College Southampton, Richard Taunton Sixth Form College and The Cowherds Inn. The nearest railway station is St Denys station, roughly 0.8 miles south-east of the centre. Nearby you’ll also find Royal South Hants Hospital (1.2 miles south) and Marlands Shopping Centre (1.7 miles south). Open spaces near Highfield include Netley Common.
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Quotes for glazing silicone in Highfield
The price is agreed before any work begins. It’s based on:
- Whether the work is at height
- When we can work, for business premises
- Mould in or behind the old joints
- The number and length of the joints
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What to tell us for a quote
What to tell us when you ask for a quote:
- How we’d reach the joints
- What’s wrong with the joints now
- How many joints, rooms or windows are involved
- Photos by email, if that is easy
For a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will send you a clear quote before any work starts.
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
Common problems we fix in Highfield
Using a sealant not made for glass causes many failures. Not every silicone sticks properly to glass and vinegar-smelling acetoxy silicone can attack some metals.
Common reasons people contact us include:
- Failed sealant around rooflight glass
- Mouldy sealant around glass panels
- Cracked silicone between glass panels
- Sealant that was laid over old silicone and failed
Rented homes near St Denys station change hands often, and leaking glazing joints, shower screens or conservatory seals are worth sorting between tenancies.
What your quote should include
- Whether you can choose the colour
- How the joint is cleaned and prepared
- Whether VAT is included
- How hidden problems are handled
Looking after it afterwards
Looking after new joints is easy:
- Check the silicone on glass every year or so
- Clear the conservatory gutters regularly
- Don’t use a blade near the sealant
- Ventilate the conservatory to cut condensation
Keep conservatory gutters clear, so water drains away from the joints. Overflowing gutters can cause leaks of their own.
Do not leave lifting or mouldy silicone on glazing. Once it starts to peel, water gets behind it and the problem grows.
When it isn’t the sealant
Sealant is not the answer to every problem, and we’d rather say so up front. It will not solve:
- A sealed unit that has misted inside
- A sagging or failing conservatory roof
- Glass that needs replacing
If you are not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Surfaces we seal
- Rooflights
- Glass-to-frame joints
- Conservatory frames
- Glass balustrade bases
- Glass-to-glass joints
- Shower screens
What happens on the day
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The work itself takes a few hours for most jobs. For a job in Highfield, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We start by finding the leak and making sure sealant is the cause.
- Old silicone is cut away from the glass and frame without scratching either.
- The glass and frame are cleaned and degreased.
- We apply a neutral-cure glazing silicone and tool it smooth.
- We check the joints and, where safe, run water over them.
How to prepare
- Clear the area around the work
- Mention any leaks or damp you’ve noticed
- Keep pets and children clear of the area while we work
Get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Advice
Places near Highfield
More services for Highfield
Highfield: your questions answered
Does the coastal weather in Highfield affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Do you work for landlords with property near St Denys station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Can I choose the sealant colour?
Most of the time, yes. We will tell you which colours the right product comes in.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Where is Mr Mastic based?
We are a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Do you replace glass?
Glass replacement is not our trade. We look after the sealant joints, and we will tell you if a unit looks like it has failed.
How do I get a quote for glazing silicone in Highfield?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or drop us an email with a short description of the job.