Oxfordshire · England
Window & door mastic in Abingdon-on-Thames, Oxfordshire
Professional window mastic in and around Abingdon-on-Thames, with old sealant always removed completely.
- Rushed sealant from a window installation
- Cold air getting in at the frame edge
- Black, perished sealant on frames
How we handle window mastic in Abingdon-on-Thames
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re fully insured ARBOMaster approved applicators, and we give a 12-month guarantee on the work. We’re often asked to deal with rain getting in at the frame or under the sill and mastic that’s falling out in pieces, across patio & French doors, uPVC windows and window sills.
Plenty of homes in a town like Abingdon-on-Thames have had conservatories, patio doors or new windows added over the years. Each one adds more joints to look after, and those joints age at different rates. Leaks normally start at a sill, a frame head or a glazing joint.
Whatever the size of the job, you get the same one-year guarantee.
- Place
- Abingdon-on-Thames (OX14)
- Wider area
- Oxfordshire
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
When it isn’t the sealant
Before you book, it’s worth knowing the limits too:
- Damp coming through the wall itself rather than the frame joint
- Broken hinges, locks or handles
- Misting between the panes of a double-glazed unit (that needs a new unit)
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly before booking.
What we seal
- Aluminium frames
- Timber windows & doors
- Window sills
- uPVC windows
- Patio & French doors
- Composite doors
How we quote for window mastic
There’s no set price list, because no two jobs are the same. What we look at:
- Mould in or behind the old joints
- Which sealant suits the joint
- How many areas need sealing
- Whether the work is at height
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we will explain what it covers.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- Any access issues, like height or stairs
- Whether it’s a home or a business
- If someone has resealed it before
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Leave it or put it right?
The work is quick compared with the damage it prevents: the visit takes a morning for a couple of windows and a door. Leave it until water is coming in and you may need plastering and decorating as well. Gaps in sealant and mould in the bead never get better on their own, and in a busy household in Abingdon-on-Thames they spread with every shower and every downpour. Replacing the sealant now is the simplest fix.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, phone 0345 464 0079 or email us for an honest opinion and a quote.
Why book with us
- Homes, businesses and hotels
- We leave the area clean and tidy
- Colour agreed with you before work begins
- 180+ five-star Google reviews
Places near Abingdon-on-Thames
What else we do in Abingdon-on-Thames
Can I do it myself?
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.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
Windows and doors in Abingdon-on-Thames
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Clifton Hampden Manor (about 3.5 miles south-east) are a reminder that the area around Abingdon-on-Thames has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
In the older streets around Christ Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Managing a site like St Nicolas Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Radley station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Abingdon-on-Thames is about 6 miles south-west of Oxford, in Oxfordshire. Homes, rented property, offices and hotels in Abingdon-on-Thames can book us for window mastic, old or new, large or small. Every job comes with our one-year guarantee. Abingdon-on-Thames is one of 443 towns and villages in Oxfordshire we cover for window mastic. For nearby work, see our Oxford page.
Every address in OX14 is within our area for window mastic. That includes homes and businesses on Marsh Court, Boxhill Walk and Heron's Walk. Abingdon-on-Thames is on the A34 and A415, which makes it straightforward to reach with everything needed for window mastic. Other places close to Abingdon-on-Thames include Caldecott (1 mile south), Radley (2 miles north-east), Culham (2 miles south-east), Sutton Courtenay (3 miles south) and Appleford-on-Thames (3 miles south-east). Larger places within reach include Oxford (6 miles north-east), Didcot (5 miles south), Witney (12 miles north-west), Carterton (15 miles north-west), Thame (14 miles east) and Wantage (8 miles south-west). As one of the bigger places in Oxfordshire, Abingdon-on-Thames has homes, rented property and businesses of every kind.
What’s near Abingdon-on-Thames
Around Abingdon-on-Thames, our work takes us to homes and buildings near John Mason School, The Spread Eagle Public House and School of St Helen and St Katharine, among other places. Abingdon-on-Thames’s nearest station is Radley station, roughly 1.9 miles east of the centre. Well-known places in the area include Pendon Museum (3.9 miles south-east) and Abingdon Community Hospital (1 mile south-west). For a walk, there’s Dry Sandford Pit and Harcourt Hill.
What happens on the day
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a morning for a couple of windows and a door, and the area is left clean. For a job in Abingdon-on-Thames, we need access to where the work is and somewhere nearby to park. If the job is outside, mention gates, side access and anything above ground floor.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Mention if the joints have been sealed before
- For business premises, tell us about site rules or sign-in
- Tell us if parking is tricky
Get a quote
Want a quote for window mastic? Please ring 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and send you a clear quote before we start.
Advice
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Keep drainage slots and sill grooves clear
- Wash the frames with mild soapy water
- Ventilate rooms so frames do not stay wet inside
- Keep paint and stain on wooden frames in good order
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak, and if anything looks wrong, just phone 0345 464 0079 or drop us an email.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
FAQs for Abingdon-on-Thames
I let a flat near Radley station. Can you help?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Is window mastic in Abingdon-on-Thames guaranteed?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Are you fully insured?
Yes. We are fully insured.
How long does it take to reseal the windows on a house?
It depends on access, the old mastic and the size of the frames. We will tell you how long your job needs when we quote.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
What do you put in the joint?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
How much does window mastic cost in Abingdon-on-Thames?
It depends on the job, so we quote each one individually. For a quick quote, call 0345 464 0079 or email us with a short description of the job.
Do I have to be there?
It depends on the job. For work indoors, someone needs to let us in.