Isle of Wight · England
Remedial sealant & repairs in Dunsbury, Isle of Wight
Removing failed, mouldy or leaking sealant and putting it right in Dunsbury, with a 12-month guarantee on every job. Ask us for a quote.
- Movement joints that have split or pulled away
- A second bead peeling off the first
- Decorators’ caulk around a bath or shower
Dunsbury questions
Is there a guarantee on remedial sealant in Dunsbury?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Is Dunsbury in your area for remedial sealant?
Yes, Dunsbury is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
Can landlords and businesses book you?
Yes. We work for householders, landlords, letting agents, businesses and hotels.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Can you take off two layers of silicone?
Yes. Stripping layered sealant takes longer than a normal reseal, but it’s what makes the new bead last.
Can I choose the sealant colour?
Usually, yes. White, clear and grey are common, and other colours are available, and we will agree it with you first.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Where are you based?
We’re a Crawley-based firm. Our area covers South East England, London and Scotland.
How we handle remedial sealant in Dunsbury
A joint that keeps failing generally has a reason. Movement, the wrong product or a leak from somewhere else will defeat even a perfect bead. Finding that cause comes before any new sealant. We work on mouldy bath & shower sealant, leaking tray & enclosure joints and failed movement joints, and people most often call us about sealant peeling off a dusty or damp surface and wide, uneven beads that look worse than the old ones.
For a small place like Dunsbury, remedial sealant is planned like any other job: it just means planning the journey and access beforehand. Once we are there, the bathroom or kitchen gets the same care as anywhere else.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Place
- Dunsbury (PO30)
- Region
- Isle of Wight
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Also near Dunsbury
Other services in Dunsbury
Keeping the joints in good condition
So the new joints stay in good condition:
- Clean sealant with mild products only
- Get the cause of a repeat leak found before resealing
- Never fill a movement joint with mortar or grout
- Don’t add new sealant on top of old
Clean gently: no scraping, scouring pads or harsh chemicals.
Mould under a second layer of sealant keeps growing out of sight. When it finally shows, the whole bead needs to come out.
Landlords, agents and businesses in Dunsbury
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Letting agents and landlords in Dunsbury can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
What happens if it’s left?
A joint that has failed twice will fail again unless the cause is dealt with. Finding it, whether movement, water from elsewhere or an unsuitable product, ends the cycle. In a small place like Dunsbury, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Why choose Mr Mastic in Dunsbury
- A sealant colour to suit the surroundings
- Colour agreed with you before work begins
- We leave the area clean and tidy
- Anti-fungal sanitary silicone in wet areas
See our cost guide and what customers say.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
What we cannot put right
It helps to know what we can’t do too:
- Sealant in an older building that needs testing for asbestos first
- Cracks in the fitting rather than the joint
- Water damage behind tiles that needs a tiler
If you are not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Surfaces we seal
- Leaking tray & enclosure joints
- Failed movement joints
- Botched or over-sealed joints
- Mouldy bath & shower sealant
- Shrunken worktop sealant
- Expansion joints
Common problems we fix in Dunsbury
Movement tears sealant that is not designed for it. Flexing baths, rocking trays and building movement joints split any bead that’s too stiff or too thin.
Common reasons people contact us are:
- Dark patches showing through the sealant
- Decorators’ caulk around a bath or shower
- Wide, uneven beads that look worse than the old ones
- Worktop sealant that has shrunk and split
Around Dunsbury, as everywhere, remedial sealant is only as good as the preparation behind it.
What your quote should include
- Whether VAT is included
- When the joint can take water or movement
- What preparation is included
- What product goes in the joint
What we do, step by step
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours, depending on how many layers have to come out. For a village or hamlet like Dunsbury, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Surrounding tiles, trays and frames are protected first.
- Every layer of failed sealant is stripped out.
- We clean and degrease the joint and look for signs of movement or water.
- New sealant goes in once the joint is dry, and is tooled smooth.
- You get the cure time and our view on why the joint failed.
Preparing for the visit
- Let us know about parking restrictions
- For business premises, tell us about site rules or sign-in
- Mention any leaks or damp you’ve noticed
Get a quote
For a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
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Dunsbury homes and their sealant
Dunsbury is close to the coast. Near the coast, holiday lets and guest houses can see bathrooms used by one guest after another, and sealant and grout that work that hard wear out sooner. Hard water is the norm across most of the South East, so limescale builds up on sealant, grout and fittings.
If you live in an older home near St. Mary's Church, older homes can move a little, which is hard on rigid grout and tired sealant.
Dunsbury is about 7 miles south-west of Newport, in the Isle of Wight. For remedial sealant in and around Dunsbury, please phone 0345 464 0079 or email us for a quick quote. We are based in Crawley and cover the Isle of Wight. Our area takes in 125 places across the Isle of Wight, from the larger towns to small villages. We also work in Southampton, around 18 miles away.
We work across the PO30 postcode area for remedial sealant and the streets around it. If you are just outside Dunsbury, we cover Brook (1 mile south), Hulverstone (1 mile south-east), Brookgreen (1 mile south-east), Shalcombe (1 mile north-east) and Chilton Green (2 miles south-east). Further out, we also cover Newport (7 miles north-east), Ryde (14 miles east), Cowes (9 miles north-east), Sandown (13 miles east), Shanklin (12 miles east) and Ventnor (12 miles east). Remote and island addresses need a little more planning, so please mention your location when you call 0345 464 0079 or drop us an email.
What’s near Dunsbury
Nearby you will also find Yarmouth Castle (3.9 miles north-west) and Calbourne Water Mill And Rural Museum (2.3 miles north-east). Not far away are Westover Down.