Oxfordshire · England
Postcombe Remedial Sealant
Removing failed, mouldy or leaking sealant and putting it right for householders, landlords and businesses in Postcombe. Fully insured, ARBOMaster approved and guaranteed for a year.
- Floor or wall movement joints that have failed
- Worktop sealant that has shrunk and split
- Over-sealed joints coming away
How we handle remedial sealant in Postcombe
Decorators’ caulk in a shower, bathroom silicone on a window, a rigid filler in a movement joint fails however neatly it’s applied. We take it out and use a sealant made for that joint. We are often asked to deal with kitchen joints letting water behind the worktop and black mould underneath the bead, across botched or over-sealed joints, shrunken worktop sealant and expansion joints.
Being in a small place like Postcombe 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.
We stand behind the work with a 12-month guarantee, so you are covered after we have gone.
- Place
- Postcombe (OX9)
- Region
- Oxfordshire
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
For landlords and businesses
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Get the cause of a repeat leak found before resealing
- Never fill a movement joint with mortar or grout
- Don’t wait for a small gap to become a leak
- Run the fan after every shower
Don’t let anyone seal over it later. New silicone doesn’t bond to old.
A failing joint rarely gets better on its own. Each use pushes more water behind the bead, into whatever is behind or below. Sorting it early limits the damage.
How the visit works
There isn’t much for you to do on the day. Point us to the joints and we’ll get on with it. The job generally takes a few hours for most joints, depending on how much old sealant has to come out. For a village or hamlet like Postcombe, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First we work out whether the problem is the sealant, movement or a leak.
- Old beads and residue are removed down to clean surfaces.
- We treat any mould and dry the joint thoroughly.
- The right product goes in, with backing where the joint moves.
- The joint is tooled and you’re told about anything else we found.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Keep children and pets away from the work area
- Clear the area around the work
Ask for a quote
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.
Advice
Postcombe questions
Is Postcombe in your area for remedial sealant?
Yes. Our work covers London and the South East, and Postcombe is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
What guarantee comes with remedial sealant in Postcombe?
All our work, in Postcombe and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Do you work for landlords and businesses?
Yes. We work for householders, landlords, letting agents, businesses and hotels across Oxfordshire.
What do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply phone 0345 464 0079 or drop us an email.
Which products do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we will tell you what we are using.
Do you have insurance?
Yes, we’re fully insured for every job we do.
Can failed expansion joints be resealed?
Yes. We cut out the failed sealant, fit backing and reseal with a flexible product.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
When something else is needed
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Failed tanking or loose tiles behind the sealant
- Plumbing leaks behind walls or under trays
- Movement from fittings that are not supported
If you are not sure, just phone 0345 464 0079 or email us and we will give you a straight answer.
What we seal
- Leaking tray & enclosure joints
- Failed movement joints
- Mouldy bath & shower sealant
- Shrunken worktop sealant
- Expansion joints
- Botched or over-sealed joints
Towns and villages near Postcombe
More services for Postcombe
Can I do it myself?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
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.
Leave it or put it right?
Adding more sealant is the usual quick fix, and it rarely works. It can’t bond to what’s underneath, so the leak carries on and there’s now more to remove. Around Postcombe, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
What you get with us
- A choice of colours where the product allows
- Approved under the ARBOMaster scheme
- Homes, businesses and hotels
- Sealant colour chosen to suit
Read what affects the cost and what customers say.
Different surfaces, different methods
Over-sealed & botched joints
Botched joints sometimes have damaged edges from earlier scraping. We work carefully to avoid adding to it, and point out any existing damage.
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.
Remedial sealant around Postcombe
Hard water is the norm across most of the South East, so limescale builds up on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in.
Homes close to Church of St Mary include some older properties, and bathrooms in older houses have often been refitted more than once, with sealant laid over sealant. In and around Postcombe, as anywhere, good remedial sealant starts with a clean, dry, properly prepared joint.
Postcombe is about 4 miles south of Thame, in Oxfordshire. Our applicators cover remedial sealant for homes and businesses in Postcombe and nearby, as part of our work across Oxfordshire. Postcombe is one of 443 towns and villages in Oxfordshire where we work for remedial sealant. We also work in Oxford, about 12 miles from Postcombe.
Every address in OX9 is covered for remedial sealant. Remedial sealant is available to properties on London Road, Salt Lane and Beech Farm Close and the roads around them. We also cover the places around Postcombe: South Weston (1 mile south-west), Aston Rowant (1 mile east), Lewknor (1 mile south), Kingston Blount (2 miles east) and Crowell (2 miles east). Within a short drive, we also cover Oxford (12 miles west), Didcot (13 miles south-west), Abingdon-on-Thames (13 miles west), Thame (4 miles north), Henley-on-Thames (11 miles south) and Benson (7 miles south-west).
Near you in Postcombe
Around Postcombe, our work takes us to homes and buildings near England's Rose pub, among other places. Other landmarks nearby include Thame Community Hospital (3.8 miles north). For a walk, there’s Aston Rowant NNR and Bald Hill.