Hampshire · England
Remedial Sealant in Sherborne St John
Removing failed, mouldy or leaking sealant and putting it right for Sherborne St John, backed by a one-year guarantee. Call for a quick quote.
- A second bead peeling off the first
- Mould trapped under a layer of silicone
- A shower that leaks however often it’s resealed
FAQs for Sherborne St John
Do you cover smaller places like Sherborne St John?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is Sherborne St John in your area for remedial sealant?
Yes. Our work covers London and the South East, and Sherborne St John is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Which products do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we’re using.
Do you have insurance?
Yes. We are fully insured for domestic and commercial work.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before resealing.
Can you remove sealant that is been put over old sealant?
Yes. We remove every layer; new silicone does not bond to old silicone, which is why over-sealing fails.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Will it make a mess?
Tidy work is part of the job. Nearby surfaces are protected, and the area is left clean when we finish.
Remedial sealant in Sherborne St John, done properly
With more than 20 years’ experience, our applicators have seen most of the ways sealant can fail. We’re ARBOMaster approved and fully insured, and every remedial job comes with a 12-month guarantee. If you are dealing with over-sealed joints coming away and torn expansion joints, we can put it right, on botched or over-sealed joints, leaking tray & enclosure joints and expansion joints alike.
Somewhere as small as Sherborne St John, homes tend to be cottages, farmhouses or converted buildings, with some newer houses too. Movement in older walls and floors tends to show first as cracked grout or split sealant.
Every job is covered by our one-year guarantee, wherever you are in Hampshire.
- Location
- Sherborne St John (RG24)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
DIY sealant or a professional job?
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.
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.
Why it’s worth doing now in Sherborne St John
Leaks that are left keep doing damage out of sight: 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 Sherborne St John, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Why Sherborne St John clients choose us
- Full insurance on every job
- 4.9 on Google from 180+ five-star reviews
- An ARBOMaster approved applicator
- Anti-fungal silicone where joints get wet
Read what affects the cost and our reviews.
Bathrooms and kitchens in Sherborne St John
Most of the South East has hard water, so limescale builds up on sealant, grout and fittings.
For landlords with property near Basingstoke station, botched sealant from a previous quick fix is easier to strip out between tenants. For an older house near a landmark such as Church of St. Andrew, walls and floors in older homes can move, and sealant and grout show it first.
Sherborne St John is about 2 miles north of Basingstoke, in Hampshire. Every kind of property in Sherborne St John is covered for remedial sealant, old or new, large or small. Every job comes with our one-year guarantee. Our Hampshire coverage runs to 683 places, and Sherborne St John is one of them. There’s also a page for Reading, roughly 12 miles from Sherborne St John.
Jobs for remedial sealant in RG24 is quoted and booked the same way as anywhere else. Streets in the area include Cranes Road, Bourne Field and Church Path. We also cover the places around Sherborne St John: Rooksdown (1 mile south-west), Winklebury (2 miles south), Basingstoke (2 miles south), Worting (3 miles south-west) and South Ham (3 miles south). Larger places within reach include Farnborough (15 miles east), Fleet (12 miles east), Aldershot (15 miles east), Alton (12 miles south-east), Yateley (12 miles east) and Tadley (4 miles north).
Landmarks near Sherborne St John
We work in homes and buildings around Everest Community Academy. For rail, the closest station is Basingstoke station, about 2.1 miles south-east of the centre. Well-known places in the area include Basing House (3.1 miles south-east) and Basingstoke and North Hampshire Hospital (1.1 miles south). For a walk, there’s Daneshill Park Woods.
Common problems we fix in Sherborne St John
A lot of failed joints have been sealed over rather than replaced. Silicone doesn’t bond to silicone, so the new layer peels, and damp and mould settle between them.
It’s worth asking for a quote if you see:
- Torn expansion joints
- Worktop sealant that has shrunk and split
- Dark patches showing through the sealant
- Thick, messy sealant smeared over tiles
If you look after a building such as Sherborne St John Church of England Primary School, we reseal washrooms and kitchens in schools and businesses as well as homes.
What to look for in a quote
- What the cure time is
- Whether you can choose the colour
- What preparation is included
- Whether they’re fully insured
Honest limits
To be straight with you, some problems need a different trade:
- Water damage behind tiles that needs a tiler
- A leaking trap, valve or supply pipe
- Older mastics that may need an asbestos check before removal
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
What we seal
- Expansion joints
- Botched or over-sealed joints
- Leaking tray & enclosure joints
- Failed movement joints
- Shrunken worktop sealant
- Mouldy bath & shower sealant
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Do not add new sealant on top of old
- Check trays and worktops don’t move
- Keep an eye on the ceiling below the bathroom
- Get the cause of a repeat leak found before resealing
Keep an eye on the joint at first, particularly where the original failure was caused by movement. Should anything change, phone 0345 464 0079 or email us.
Signs to act on: sealant lifting at the ends, a second bead visible on top of the first, black mould under the silicone, or stains below a bathroom. Any of them means it’s time for remedial work.
How it works
A visit follows a simple pattern: we check the joints, protect the area around them, do the work and clear up. Most jobs take a few hours for most joints, depending on how much old sealant has to come out. Somewhere like Sherborne St John needs a little journey planning: let us know about lanes, gates and parking. 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.
- We finish neatly and point out anything that needs another trade.
Before we arrive
- Clear items away from the joints we are working on
- For indoor joints, keep the area dry beforehand if you can
- On commercial sites, let us know about site rules
Ask for a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we’ll take it from there.
Advice
Quotes for remedial sealant in Sherborne St John
Every job gets its own quote. This is what makes a difference:
- The type of sealant required
- Any working-time requirements on site
- How much old sealant there is and how hard it is to remove
- Mould in or behind the old joints
Combining jobs into one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Asking for a quote
To help us quote quickly, please include:
- Whether it’s a home or a business
- The rough size of the job
- The problem you’ve noticed
- Access, such as stairs, a lift or height
We don’t publish a price list, because every job is different. Instead, we send you a clear quote for your job. To get started, call 0345 464 0079 or email us.