Isle of Wight · England
Remedial sealant & repairs in Newtown, Isle of Wight
Removing failed, mouldy or leaking sealant and putting it right for Newtown, backed by a 12-month guarantee. Call for a quick quote.
- Wide, uneven beads that look worse than the old ones
- Gaps opening along the back of the worktop
- A second bead peeling off the first
How it works
There is not much for you to do on the day. Show us the job and we will take it from there. The work itself takes a few hours for a typical bath or shower, longer where several layers have been applied. For a village or hamlet like Newtown, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking the joint for movement, leaks and the reason it failed.
- Every layer of old sealant is cut and cleaned out.
- The joint is cleaned, treated for mould and left to dry.
- Moving joints get backing and a flexible sealant to suit.
- We tool the joint and tell you about anything else that needs attention.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we’re working on
Get a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved before giving you a price.
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Remedial sealant in Newtown
Movement and expansion joints fail when the sealant can’t stretch. We cut out the failed sealant and set the depth with backing, before resealing with a flexible product suited to the movement. Typical jobs include wide, uneven beads that look worse than the old ones and over-sealed joints coming away, on shrunken worktop sealant, botched or over-sealed joints and leaking tray & enclosure joints.
For a small place like Newtown, remedial sealant is planned like any other job: it just means planning the journey and access beforehand. In the bathroom or kitchen, the work is the same as in any town.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Newtown (PO30)
- Region
- Isle of Wight
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
If you’ve already had a go yourself, that is fine. We cut it out and start again.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
How we quote for remedial sealant
The quote reflects the job in front of us. We look at:
- Whether there’s mould to deal with
- The number and length of the joints
- The product the joint needs
- The old material and how stubborn it is
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
When you contact us, it’s useful to know:
- The type of property
- Whether it has been sealed before
- Where the job is, and your postcode
- Pictures of the joints, sent by email
We quote each job on its own. Simply phone 0345 464 0079 or send us an email and describe the job, and pictures are welcome.
What sealant work can’t fix
Some problems need a builder, plumber or other trade rather than us:
- A tray or bath that is cracked
- Sealant in an older building that needs testing for asbestos first
- Failed tanking or loose tiles behind the sealant
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
What we seal
- Failed movement joints
- Shrunken worktop sealant
- Mouldy bath & shower sealant
- Expansion joints
- Botched or over-sealed joints
- Leaking tray & enclosure joints
Leave it or put it right?
Hidden water does the most damage: wet floors, stained ceilings and swollen worktops. By comparison, sorting the joint is quick. Where a wall is exposed, as many are in small places like Newtown, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or drop us an email and we will talk you through it.
Why choose Mr Mastic in Newtown
- Trusted Arbo and Everbuild sealants
- 4.9 on Google from 180+ five-star reviews
- You choose the colour before work begins
- 12-month guarantee on every job
Take a look at how sealant jobs are priced or what customers say.
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Use a soft cloth, not a scourer, on silicone
- Have loose fittings fixed before resealing
- Keep movement joints clear of mortar and paint
- Deal with small splits early
Watch the joint over the first few weeks, particularly where the original failure was caused by movement. Should anything change, ring 0345 464 0079 or send us an email.
Mould under a second layer of sealant keeps growing out of sight. By the time it shows through, the joint is well past saving.
What we are called out for in Newtown
Silicone only bonds to surfaces that are clean and dry. Residue, moisture or dust left in the joint weaken the bond, so it starts lifting sooner than it should.
It’s worth asking for a quote if you see:
- Smears and lumps from a botched reseal
- Dark patches showing through the sealant
- Sealant that came away because the surface wasn’t prepared
- Floor or wall movement joints that have failed
For an older house near a landmark such as Holy Spirit Church, walls and floors in older homes can move, and sealant and grout show it first.
Before you book anyone
- Who turns up on the day
- When the joint can take water or movement
- Whether you can choose the colour
- How the joint is cleaned and prepared
Places near Newtown
Other services in Newtown
What remedial sealant looks like in Newtown
Newtown is within about 1 mile of 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. Most of the South East has hard water, so limescale builds up on sealant, grout and fittings.
In and around Newtown, as anywhere, good remedial sealant starts with a clean, dry, properly prepared joint.
Newtown is about 4 miles west of Newport, in the Isle of Wight. If you need remedial sealant in Newtown, please call 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover the Isle of Wight, Newtown included. Newtown is one of 125 places in the Isle of Wight where we work. You can also see our page for Southampton, roughly 14 miles from Newtown.
Here we cover the PO30 postcode area for remedial sealant. Neighbouring places we cover for remedial sealant include Locksgreen (1 mile east), Porchfield (1 mile north-east), Great Thorness (2 miles north-east), Forest Side (3 miles east) and Rew Street (4 miles north-east). Within a short drive, we also cover Newport (4 miles east), Ryde (10 miles east), Cowes (5 miles north-east), Sandown (11 miles east), Shanklin (11 miles south-east) and Ventnor (11 miles south-east). Island and remote addresses take a little more planning, so tell us where you are when you ask for a quote.
Around Newtown
Nearby you’ll also find St Mary's Hospital (4 miles east) and Carisbrooke Castle (3.7 miles south-east). For a walk, there’s Brighstone Down.
Newtown: your questions answered
Will you come out to Newtown?
Yes, Newtown is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you cover Newtown for remedial sealant?
Yes, Newtown is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
How long does the work take?
It takes a few hours for most joints, depending on how much old sealant has to come out. We’ll give you a timescale when we quote.
Are you insured?
Yes. We are fully insured for domestic and commercial work.
Can you reseal a split movement joint?
Yes. Backing sets the depth and stops the sealant sticking to the back.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
Will it make a mess?
Tidy work is part of the job. We protect what’s around the joints, and we clear up when we are done.