Southampton · England
Glazing & conservatory sealant in Harefield, Southampton
Glazing silicone across Harefield and nearby, with every bit of old sealant taken out first and a one-year guarantee.
- Failed sealant around rooflight glass
- Cracked silicone between glass panels
- Mouldy sealant around glass panels
When something else is needed
A few problems are outside what sealant work can do:
- Structural problems with a conservatory roof
- A frame that needs repairing or replacing
- A broken pane or roof panel
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before booking.
What we seal
- Glass balustrade bases
- Shower screens
- Conservatory frames
- Glass-to-frame joints
- Glass-to-glass joints
- Rooflights
Glazing silicone in Harefield, done properly
Cracked, stained or lifting silicone on glass spoils the look and lets water in. We remove it without scratching the glass or frame before the new bead goes in. We work on glass-to-frame joints, conservatory frames and glass-to-glass joints, and common reasons people get in touch are cracked silicone between glass panels and new silicone smeared over old sealant.
Homes around Harefield 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.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Harefield (SO18, SO19, SO30)
- Wider area
- Southampton
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Why deal with it now?
Silicone around glazing needs the right product. General-purpose sealant from a DIY shop may not suit glass or the frame, so we use neutral-cure glazing silicone. In a smaller place like Harefield, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we’ll go through it with you.
Why choose Mr Mastic in Harefield
- 12-month guarantee on every job
- Quality sealants from Arbo and Everbuild
- We leave the area clean and tidy
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at how sealant jobs are priced or customer reviews.
Landlord and commercial work in Harefield
Housing providers, facilities teams and property managers book us too in Harefield and across Southampton. We can quote a run of properties together.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Act on drips or damp patches early
- Avoid strong solvents on or near the sealant
- Inspect the sealant on glazing annually
- Squeegee the shower screen after each use
Follow the cure time we give you before the joints get wet. From then on, a mild glass cleaner is all it needs.
A leaking shower screen may not show at first. Water can soak into the floor or reach the room below long before you see it.
Quotes for glazing silicone in Harefield
There’s no set price list, because no two jobs are the same. The quote depends on:
- How easy the joints are to reach
- How many areas need sealing
- The type of sealant required
- Whether old sealant or filler has to be cut out
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- If someone has resealed it before
- Pictures of the joints, sent by email
- Access, such as stairs, a lift or height
- The address or postcode of the job
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or email us and describe the job and send photos if you have them.
The process
When we arrive, we start by going over the job with you, so you know exactly what we’re doing. We protect the surfaces around the joints before any work begins. The work generally takes a few hours, depending on how many joints need doing. A visit to Harefield is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First, we trace the leak and check it’s coming through a sealant joint.
- Old silicone is cut away from the glass and frame without scratching either.
- 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.
How to prepare
- Try not to wet indoor joints just before the visit
- Mention any sign-in or site rules at work premises
- Mention any parking rules near the property
Ask for a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand.
Related advice
Harefield questions
Does living near the coast affect glazing silicone in Harefield?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Do you work for landlords with property near Bitterne station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can go on one quote. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Where are you based?
We are based in Crawley, and we cover South East England, London and all of Scotland.
Can I choose the sealant colour?
We help you choose a colour that suits, from white and clear to greys and other shades. The choice depends on the product the joint needs.
What should I tell you?
Tell us what needs doing and where, plus pictures if you have them. We will ask anything else we need to know.
Do the sealants smell?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
Can you fix a leaking conservatory?
Often, if the leak is at a sealant joint. We find where the water gets in first, so you know what you are paying for.
Can you quote for more than one area?
Yes. Several rooms, windows or areas can go on one quote.
Nearby places to Harefield
What else we do in Harefield
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
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.
Glazing silicone in Harefield: local notes
Harefield is within about 3 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on glazing joints and frame seals, especially on the side facing the sea. Historic houses like South Stoneham House (about 1.9 miles north-west) are a reminder that the area around Harefield has older buildings as well as new. 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.
For an older house near a landmark such as Church of St James, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you let a flat or house near Bitterne station, leaking glazing joints, shower screens or conservatory seals are worth sorting between tenancies. If you look after a building such as Harefield Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Harefield is about 2 miles east of Southampton, in Southampton. Wherever you are in the SO18 postcode area, our applicators can take on glazing silicone. Across Southampton, we cover 40 places, and Harefield is one of them.
Every address in SO18, SO19 and SO30 is within our area for glazing silicone, from the main roads to the quietest streets. Glazing silicone is available to properties on Dean Road, Marne Road and Keats Road and the roads around them. You will find Harefield on the A334, which makes it straightforward to reach. Close by, we work in Thornhill (1 mile south), West End (1 mile north), Chartwell Green (1 mile north), Bitterne (1 mile south-west) and Townhill Park (1 mile north-west). Larger places within reach include Shirley (4 miles west), Regents Park (4 miles west), Maybush (5 miles west), Coxford (4 miles west), Freemantle (4 miles west) and Lordswood (4 miles north-west). As one of the bigger places in Southampton, Harefield has every kind of property, from flats to offices.
Landmarks near Harefield
Around Harefield, our work takes us to homes and buildings near The Gregg School, Woodlands Community College and The Red Lion pub. The nearest railway station is Bitterne station, about 1.5 miles west. Well-known places in the area include Moorgreen Hospital (1.1 miles north-east) and Netley Castle (3 miles south). Green spaces nearby include Netley Common.