Oxfordshire · England
New-build mastic & snagging in Banbury, Oxfordshire
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Banbury and across Oxfordshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Cracked sealant around new window and door frames
- Untidy sealant flagged on a snagging list
- Beads laid onto grit and dust from the build
What happens on the day
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours in a single home. For a job in Banbury, 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 work through your snagging list or plot schedule with you.
- We cut out every bit of the failed or messy sealant.
- Surfaces are cleaned of building dust and primed where needed.
- A sealant chosen for each area goes in and is tooled smooth.
- Each area is checked and left with its cure time.
Before we arrive
- On commercial sites, let us know about site rules
- Clear items away from the joints we are working on
- Tell us about any previous sealing or DIY attempts
Get a quote
Asking for a quote is easy: tell us what needs doing and where. A few pictures by email make the job easier to understand.
Read more
New build mastic in Banbury, done properly
Some new-home owners let the house settle before resealing. For small cosmetic gaps, that’s reasonable, but a seal that is letting water through needs doing now. If you are dealing with sealant applied over dusty or wet surfaces and smeared, uneven beads picked up at snagging, we can put it right.
Homes around Banbury move a little with the seasons, and skirting and floor joints show it first. Those joints need a flexible sealant, as rigid filler soon cracks out.
A 12-month guarantee comes as standard, so you are covered after we’ve gone.
- Location
- Banbury (OX16, OX17)
- Wider area
- Oxfordshire
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
When it is not the sealant
A few problems are outside what sealant work can do:
- Leaking fittings rather than failed sealant
- Baths and trays that move too much for sealant to cope with
- Broken tiles or a split tray
If you’re not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer.
What we seal
- Kitchens
- Plot handovers
- Bathrooms & en suites
- Skirting & floors
- Show homes
- Windows & doors
How the job changes by surface
Show homes
Tired or marked sealant in a show home can be renewed. The old bead comes out and a clean new one goes in.
Plot handovers
Send us the schedule and any sealant specification. Sealant work across the plot is covered.
What happens if it’s left?
A tube of sealant from the DIY shop will not fix the cause: dust, no primer and old sealant left in the joint. Proper removal and preparation are what make it last. Draughts from a gap round a frame, damp under a sill or water behind a bath panel all start small, and they’re far easier to fix early.
What you pay reflects the work, not guesswork. That is why we ask a few questions first.
Why book with us
- 20+ years of sealant experience
- Every job guaranteed for a year
- Approved under the ARBOMaster scheme
- Fully insured
See our cost guide or customer reviews.
Joints and finishes in Banbury homes
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’ve bought a new home near Banbury station, the sealant around baths, showers and frames is worth checking in the first year or two.
Banbury is in Oxfordshire. Jobs in Banbury get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. 443 places in Oxfordshire are on our list. You can also see our page for Oxford, about 22 miles away.
Here we cover the OX16 and OX17 postcode area for new build mastic. If you need new build mastic at a property on High Street, Market Place and Grimsbury Square or anywhere close by, we can help. Being close to the A361 and A422, Banbury is easy for our applicators to reach. Close by, we work in Neithrop (1 mile west), Ruscote (1 mile west), Grimsbury (1 mile east), Drayton (1 mile north-west) and North Newington (2 miles west). Within a short drive, we also cover Bicester (14 miles south-east), Bure Park (13 miles south-east), Chipping Norton (12 miles south-west), Woodstock (15 miles south), Bloxham (3 miles south) and Charlbury (14 miles south-west). As one of the bigger places in Oxfordshire, Banbury has every kind of property, from flats to offices.
What’s near Banbury
We work in homes and buildings around People's Park, Banbury Academy and Duke of Wellington pub, among other places. For rail, the closest station is Banbury station, about 0.8 miles east of the centre. Other landmarks nearby include Castle Quay Shopping Centre (0.5 miles east) and Banbury Castle (0.5 miles east). The countryside around Banbury includes Crouch Hill and Farthinghoe Nature Reserve.
Do you need new build mastic in Banbury?
The wrong product is sometimes used in the wrong place: decorators’ caulk in a wet area, or a stiff sealant where there’s movement. Both fail early.
The most common problems we see are:
- Frame joints opening as the plaster dries
- Beads laid onto grit and dust from the build
- Sealant work across a run of new homes
- Gaps opening as the house dries out and settles
In and around Banbury, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Before you book anyone
- Is VAT in the price?
- Is the old sealant removed completely?
- Which sealant they’ll use, and why
- How the colour is chosen
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Keep water off fresh sealant until it has cured
- Record problems with dated pictures
- Clean sealant with mild detergent, not abrasives
- Check bath and shower seals every few months as the house settles
Watch the joints as the house settles. Hairline gaps can open as timber and plaster dry.
Leave a failed new-build seal and water can reach the floor and the ceiling below. Early resealing keeps the job small and the new finishes intact.
Also near Banbury
More services for Banbury
Common questions in Banbury
Do you work for landlords with property near Banbury station?
Yes. We work for landlords and agents as well as householders. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Is Banbury in your area for new build mastic?
Yes. Our work covers London and the South East, and Banbury is part of that. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we will give you a clear quote.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
What does new build mastic cost?
Size, access and the old material all affect the cost. Call for a quick quote and we’ll talk you through it.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
Is the work guaranteed?
Yes. Each job is guaranteed for twelve months, wherever you are.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Banbury.
Can you do plot mastic on a new development?
Yes. We carry out plot mastic and second-fix sealing for builders and developers. Send the schedule and any specification and we’ll give you a quote.
Can I do it myself?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.