Oxfordshire · England
Long Wittenham Glazing Silicone
Problem with your glazing joints in Long Wittenham? We cut out the old, prepare the joints and apply the right sealant.
- A quick top-up bead that didn’t last
- Glazing silicone that has cracked or come away
- Leaking glazing joints on a rooflight
Glazing silicone for homes and businesses in Long Wittenham
Our work covers conservatory joints, rooflights and glass panels plus shower screens and the bases of glass balustrades. Each joint is cut out, cleaned and resealed. We work on shower screens, glass-to-frame joints and glass-to-glass joints, and common reasons people get in touch are water tracking down the inner face of the glass and silicone pulling away from the glass.
Mastic can only go onto a dry, clean joint, so window work in Long Wittenham is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
Your job is guaranteed for a year, as with all our work.
- Where
- Long Wittenham (OX14)
- Wider area
- Oxfordshire
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Stick to mild cleaners on glass
- Get a new leak looked at quickly
- Clear the conservatory gutters regularly
- Do not use a blade near the sealant
Gentle products are best near the sealant. Strong solvents can soften or mark it.
Drips or damp near a glazing joint shouldn’t be ignored. It may be sealant, or something else, and we’ll tell you which.
Long Wittenham questions
Will you come out to Long Wittenham?
Yes, Long Wittenham is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
I let a flat near Appleford station. Can you help?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Can you fix a leaking conservatory?
Often, if the leak is at a sealant joint. We trace the leak first, so you know what you are paying for.
Do you offer different sealant colours?
Most of the time, yes. We’ll explain which colours are available and agree one before we start.
Where is Mr Mastic based?
We are a Crawley-based firm. We work across South East England, London and Scotland.
Is the work guaranteed?
All our work has a 12-month guarantee.
Do you do commercial work?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used.
How the job changes by surface
Conservatory frames
Frame joints face sun and rain all year. A fresh bead seals them again.
Rooflights
A rooflight faces rain and sun from above. Its sealant ages faster than vertical joints.
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We work for letting agents and landlords as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
Places near Long Wittenham
Also in Long Wittenham
When something else is needed
We will always be straight with you, so here’s what sealant cannot fix:
- A sagging or failing conservatory roof
- Condensation trapped between two panes
- A frame that needs repairing or replacing
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
Joints and surfaces we work on
- Conservatory frames
- Rooflights
- Glass-to-frame joints
- Glass balustrade bases
- Glass-to-glass joints
- Shower screens
Long Wittenham homes and the weather
With historic houses such as Clifton Hampden Manor (about 1.2 miles north) nearby, there’s older building stock in the area around Long Wittenham 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. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Long Wittenham (Church of England) Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Appleford station? Then leaking glazing joints, shower screens or conservatory seals are worth sorting between tenancies.
Long Wittenham is about 3 miles north-east of Didcot, in Oxfordshire. We carry out glazing silicone for householders, landlords and businesses in Long Wittenham and the surrounding area, as part of our work across Oxfordshire. Our Oxfordshire coverage runs to 443 places, and Long Wittenham is one of them. We also work in Oxford, about 8 miles from Long Wittenham.
We work across OX14 for glazing silicone and the streets around it. You will find streets such as High Street, Didcot Road and Wessex Way, all of which we cover. Other places close to Long Wittenham include Clifton Hampden (1 mile north), Appleford-on-Thames (1 mile west), Culham (2 miles north-west), Didcot (3 miles south-west) and Sutton Courtenay (3 miles west). Within a short drive, we also cover Oxford (8 miles north), Abingdon-on-Thames (4 miles north-west), Thame (13 miles north-east), Wantage (10 miles west), Henley-on-Thames (15 miles south-east) and Grove (9 miles west).
Near you in Long Wittenham
Locally, jobs take us to homes and businesses close to The Plough Public House. For rail, the closest station is Appleford station, roughly 1.3 miles west of the centre. Other landmarks nearby include Brightwell Castle (2.6 miles south-east) and Pendon Museum (under half a mile west). Green spaces nearby include Wittenham Clumps and Mowbray Fields.
Signs you need glazing silicone in Long Wittenham
Some conservatory leaks aren’t sealant at all: failed roof panels, slipped glazing bars and blocked gutters cause them too. We find the cause before we seal anything.
Common reasons people contact us include:
- Black or yellowed silicone on glass joints
- Leaks where conservatory glass meets the frame
- New silicone smeared over old sealant
- Water running down inside the glass
In the older streets around Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What your quote should include
- How the colour is chosen
- Is VAT in the price?
- How much experience the applicator has
- Whether they’re fully insured
What happens on the day
On the day, 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 normally takes a few hours, depending on how many joints need doing. In a small place like Long Wittenham, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we check where the water gets in.
- We remove the old sealant carefully.
- The joint is cleaned and degreased.
- A neutral-cure glazing silicone is applied and tooled.
- We check the finished joints and test with water where it’s safe.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
- Mention if the joints have been sealed before
Getting a quote
We quote each job on its own, so start by telling us what you need. Just phone 0345 464 0079 or send us an email with the details.
Advice
Quotes for glazing silicone in Long Wittenham
The price is agreed before any work begins. It’s based on:
- How much old sealant there is and how hard it is to remove
- Working hours on commercial sites
- Mould in or behind the old joints
- How easy the joints are to reach
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or send us an email.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- How we’d reach the joints
- Where the property is
- Roughly how big the job is
- Whether it’s a home or a business
Want a quote for glazing silicone? Please ring 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and give you a clear price before we start.