Oxfordshire · England
Remedial Sealant in Northway
Professional remedial sealant in and around Northway, with every bit of old sealant taken out first and a 12-month guarantee.
- Movement joints that have split or pulled away
- A second bead peeling off the first
- Wide, uneven beads that look worse than the old ones
Remedial sealant in Northway
Getting old sealant out properly is slow, careful work. Every layer is cut out, the residue cleaned off and the joint degreased, taking care not to scratch the surfaces around it. Only then can new sealant bond. If you’re dealing with wide, uneven beads that look worse than the old ones and kitchen joints letting water behind the worktop, we can help.
Even in a smaller place like Northway, bathrooms and kitchens see heavy daily use. Older or newer, every room gets the same approach: all the old material out, the joint cleaned and dried, then new sealant or grout.
Every job is covered by a one-year guarantee, wherever you are in Oxfordshire.
- Location
- Northway (OX3)
- Wider area
- Oxfordshire
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Northway homes and their sealant
Most of the South East has hard water, so limescale builds up on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in.
If you let a flat or house near Oxford station, botched sealant from a previous quick fix is easier to strip out between tenants. In the older streets around St Anthony of Padua, older homes can move a little, which is hard on rigid grout and tired sealant.
Northway is about 1 mile north of Oxford, in Oxfordshire. Anywhere in OX3, our applicators can take on remedial sealant. Our area takes in 443 places across Oxfordshire, large and small.
We cover every part of the OX3 postcode area for remedial sealant. You’ll find streets such as Copse Lane, Marsh Lane and Upway Road, all of which we cover. Being close to the A40, Northway is simple for us to get to for remedial sealant. We also cover the places around Northway: Headington (1 mile south-east), Marston (1 mile north-west), New Marston (1 mile south-west), Headington Hill (1 mile south) and Headington Quarry (1 mile south-east). We also work in nearby towns such as Didcot (11 miles south), Bicester (9 miles north), Abingdon-on-Thames (7 miles south), Witney (12 miles west), Thame (11 miles east) and Wantage (15 miles south-west).
Near you in Northway
In Northway, that means homes and buildings near English Faculty Library, Bury Knowle Park and Cheney School, among other places. Other local landmarks include Rye St Antony School (0.8 miles south) and White Hart Inn (0.6 miles south-east). For rail, the closest station is Oxford station, roughly 2.4 miles south-west. Well-known places in the area include Churchill Hospital (0.5 miles south) and Oxford Castle (2.2 miles south-west). Open spaces near Northway include Headington Hill and CS Lewis Nature Reserve.
Why act early in Northway
Spraying mould remover on a sealed-over joint does not reach what’s underneath. The layers have to come out. Around Northway, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.
Doing several joints on one visit generally makes better use of the time than several visits. You’ll get one clear quote for the whole job.
Why choose Mr Mastic in Northway
- A 12-month guarantee on all work
- Anti-fungal silicone where joints get wet
- Over 20 years’ experience
- Old sealant always removed completely
Take a look at what affects the cost and customer reviews.
What we do, step by step
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a typical bath or shower, longer where several layers have been applied. For a job in Northway, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First we find out how and where the joint has failed.
- We strip the joint completely, removing any layers below.
- We clean the joint, treat any mould and let it dry.
- Where the joint moves, backing and a flexible sealant suited to the movement go in.
- Finally we finish the joint and talk you through what we found.
How to prepare
- Mention if the joints have been sealed before
- For business premises, tell us about site rules or sign-in
- For indoor joints, keep the area dry beforehand if you can
Get a quote
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Read more
Honest limits
New sealant can’t fix everything, and we’d rather say so up front. Sealant will not put right:
- A cracked shower tray or bath (that needs repair or replacing)
- A leaking trap, valve or supply pipe
- Water damage behind tiles that needs a tiler
If you are not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Mouldy bath & shower sealant
- Failed movement joints
- Leaking tray & enclosure joints
- Expansion joints
- Botched or over-sealed joints
- Shrunken worktop sealant
Common problems we fix in Northway
One of the commonest remedial jobs is sealant on top of sealant. New silicone can’t stick to the old bead, so the new layer peels, and damp and mould settle between them.
Signs it’s time to call us include:
- Smears and lumps from a botched reseal
- Decorators’ caulk around a bath or shower
- Worktop sealant that has shrunk and split
- Repeat leaks from the same joint
For site and facilities teams at buildings such as New Marston Primary School, its toilets, changing areas and kitchens need their sealant renewed like any other building’s.
Before you book anyone
- What guarantee comes with the work
- Is VAT in the price?
- Whether you can choose the colour
- How hidden problems are handled
Towns and villages near Northway
Other services in Northway
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Do not add new sealant on top of old
- Act on a lifting corner straight away
- Use a soft cloth, not a scourer, on silicone
- Run the fan after every shower
Watch the joint over the first few weeks, especially if movement was the problem. If anything changes, just ring 0345 464 0079 or email us.
Leaks through failed sealant grow over time. Every shower or downpour sends more water through, into floors, walls or ceilings. Early action keeps it to a sealant job.
Can I do it myself?
If you’re 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.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
FAQs for Northway
Do you cover smaller places like Northway?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Oxford station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Does remedial work come with a guarantee?
Yes. You get our 12-month guarantee, and we are fully insured.
Will it make a mess?
No. The area is protected while we work and cleaned up afterwards.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll explain our choice.
Do you have insurance?
Yes. We are fully insured, and we’ve been doing sealant work for more than 20 years.
Different surfaces, different methods
Windows & doors
Some leaks around windows come from the wall or the window itself. If the frame joint is not the cause, we will say so.
Mouldy bath & shower sealant
Repeat mould generally points to a damp, poorly aired room. Along with resealing, we’ll mention if the room needs better ventilation.