Oxfordshire · England
Long Wittenham Remedial Sealant
Our applicators work in Long Wittenham on removing failed, mouldy or leaking sealant and putting it right. Old sealant removed completely, joints prepared properly.
- Sealant that came away because the surface wasn’t prepared
- Smears and lumps from a botched reseal
- Dark patches showing through the sealant
Remedial sealant for homes and businesses in Long Wittenham
If a joint has been resealed and is leaking again, it’s worth a proper look. Send pictures when you call 0345 464 0079 or send us an email. We work on failed movement joints, botched or over-sealed joints and expansion joints, and the jobs we see most are worktop sealant that has shrunk and split and sealant peeling off a dusty or damp surface.
Being in a small place like Long Wittenham makes no difference to the job itself: the journey and access are simply agreed in advance. In the bathroom or kitchen, the work is the same as in any town.
There’s a 12-month guarantee on every job, large or small.
- Location
- Long Wittenham (OX14)
- Region
- Oxfordshire
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for remedial sealant
Your quote is based on your job. We look at:
- Access and height
- Mould in or behind the old joints
- The product the joint needs
- Whether old sealant or filler has to be cut out
What you pay reflects the work, not guesswork. That is why we ask about the job first and give you a clear price before any work starts.
What to tell us for a quote
What to tell us when you ask for a quote:
- If it’s domestic, commercial or a hotel
- A few pictures by email, if you can
- Any previous sealing or DIY work
- Any access issues, like height or stairs
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. When it suits you, call 0345 464 0079 or send us an email.
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What we do, step by step
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a typical bath or shower, longer where several layers have been applied. Somewhere as small as Long Wittenham, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we find out how and where the joint has failed.
- We strip the joint completely, removing any layers below.
- Next, any mould is treated and the joint dried.
- We use the right backing and sealant for any joint that moves.
- We tool the joint and tell you about anything else that needs attention.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
Getting a quote
If you are in Long Wittenham and need remedial sealant, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
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What we can’t put right
It helps to know what we cannot do:
- Leaks from a shower valve, waste or pipework (a plumber’s job)
- Sealant in an older building that needs testing for asbestos first
- A cracked shower tray or bath (that needs repair or replacing)
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Where we work in Long Wittenham
- Shrunken worktop sealant
- Expansion joints
- Botched or over-sealed joints
- Failed movement joints
- Leaking tray & enclosure joints
- Mouldy bath & shower sealant
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
What remedial sealant looks like in Long Wittenham
Hard water is the norm across most of the South East, which leaves limescale on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in.
For site and facilities teams at buildings such as Long Wittenham (Church of England) Primary School, its toilets, changing areas and kitchens need their sealant renewed like any other building’s. Rented homes near Appleford station change hands often, and a joint that keeps failing is best fixed properly while the property is empty. If you live in an older home near Church of St Mary, walls and floors in older homes can move, and sealant and grout show it first.
Long Wittenham is about 3 miles north-east of Didcot, in Oxfordshire. For remedial sealant in and around Long Wittenham, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We are based in Crawley and cover Oxfordshire. Long Wittenham is one of 443 places in Oxfordshire we cover. We also work in Oxford, about 8 miles from Long Wittenham.
Postcode districts we cover here for remedial sealant: OX14. Whether your property is on High Street, Didcot Road and Wessex Way or a nearby road, our applicators can take on the job. We also cover 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).
Local landmarks in Long Wittenham
In Long Wittenham, that means homes and buildings near The Plough Public House and the streets around them. Long Wittenham’s nearest station is Appleford station, about 1.3 miles west. Other landmarks nearby include Brightwell Castle (2.6 miles south-east) and Pendon Museum (less than half a mile west). Open spaces near Long Wittenham include Wittenham Clumps and Mowbray Fields.
Long Wittenham questions
Can you help a landlord with a rental near Appleford station?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Is Long Wittenham within the area you cover?
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.
My shower still leaks after a reseal. Can you sort it?
Yes. We will take all the sealant out, look for why it failed and reseal it properly.
Can you reseal a split movement joint?
Yes. Failed movement joints are cut out and resealed with backing and a flexible sealant suited to the movement.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all.
What if resealing won’t fix my leak?
We check for that before we reseal. If the fault is elsewhere, you’ll know before any work is done.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Are you insured?
Yes. We are fully insured for domestic and commercial work.
Why act early in Long Wittenham
Another bead over the top will not fix a failed joint. It does not grip the old layer, leaving the leak in place and one more layer to cut out later. In a small place like Long Wittenham, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Combining jobs into one visit generally makes better use of the time than several visits. We’ll give you a clear quote for the lot.
Why choose Mr Mastic in Long Wittenham
- Tidy, careful work
- Quality sealants from Arbo and Everbuild
- White, clear, grey or coloured to suit, where the product allows
- Homes, businesses and hotels
Landlords, agents and businesses in Long Wittenham
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Different surfaces, different methods
Mouldy bath & shower sealant
Mould can sit behind the silicone, not just in it. Once it’s all removed, the joint is treated.
Windows & doors
A frame that keeps leaking may not be the mastic. If the frame joint is not the cause, we’ll say so.