Southampton · England
Remedial sealant & repairs in Southampton
Removing failed, mouldy or leaking sealant and putting it right for Southampton, backed by a one-year guarantee. Ask us for a quote.
- Caulk or the wrong sealant used in a wet area
- Movement joints that have split or pulled away
- Beads that never stuck properly
What the job involves on each surface
Worktops & kitchens
Shrunken worktop sealant leaves a gap that lets water into the back edge. We strip it, degrease the joint and reseal colour-matched to the worktop.
Mouldy bath & shower sealant
Mould often spreads under the bead as well as through it. We treat the exposed joint once the bead is out so the new sealant starts clean.
Remedial sealant in Southampton, done properly
A movement joint stops working when its sealant splits or sets hard. We cut out the failed sealant and set the depth with backing, then a flexible sealant matched to the movement goes in. We work on failed movement joints, mouldy bath & shower sealant and leaking tray & enclosure joints, and people most often call us about decorators’ caulk around a bath or shower and sealant peeling off a dusty or damp surface.
Southampton has offices, shops and other businesses as well as homes, all with washrooms and kitchens that need the same care as a family bathroom. Homes and businesses get the same careful preparation before anything new goes in.
You’re covered for a year from the day we finish. If anything isn’t right with it, phone 0345 464 0079 or drop us an email.
- Where
- Southampton (SO19, SO16, SO15, SO18)
- Wider area
- Southampton
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Bathrooms and kitchens in Southampton
Southampton is within about 2 miles of the coast. Coastal homes, holiday lets and guest houses can see heavy bathroom use in busy months, and sealant and grout that work that hard wear out sooner. Southampton has hotels and guest accommodation nearby. As well as homes, we work in hotel bathrooms, where resealing and regrouting can be done room by room.
Rented homes near St Denys station change hands often, and botched sealant from a previous quick fix is easier to strip out between tenants. If you look after a building such as Bevois Town Primary School, its toilets, changing areas and kitchens need their sealant renewed like any other building’s.
Southampton is in England. Anywhere in SO19, our applicators can take on remedial sealant. We cover 40 towns and villages across Southampton, from the larger towns to small villages.
All of SO19, SO16, SO15 and SO18 is within our area for remedial sealant. Remedial sealant is available to properties on London Road, Marshall Square and Grosvenor Square and the roads around them. Main roads around Southampton include the A27 and A33, which makes travel easy. Nearby, we also carry out remedial sealant in Inner Avenue (1 mile west), St Denys (1 mile north-east), Bitterne Manor (1 mile east), Portswood (1 mile north) and Northam (1 mile south-east). We also work in nearby towns such as Maybush (3 miles west), Eling (4 miles west), Rownhams (3 miles north-west), Hounsdown (5 miles west), Nursling (4 miles north-west) and Hillyfields (3 miles west).
Landmarks near Southampton
Around Southampton, our work takes us to homes and buildings near Rockstone Place Park, The Hobbit pub and St Mary's Independent School. There’s a railway station in Southampton itself: St Denys station. Nearby you will also find Marlands Shopping Centre (1 mile south-west) and R J Mitchell Museum (0.9 miles south-west). For a walk, there’s Netley Common.
Towns and villages near Southampton
What else we do in Southampton
Why deal with it now?
Mould under a bead can’t be reached by cleaning. Removal is the only way to get at it, and the joint treated and dried before resealing. In a busy place like Southampton, a failed joint in a flat or office can send water into the space below, where it’s often found late and is bigger to put right.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email.
Why choose Mr Mastic in Southampton
- Domestic, commercial and hotel work
- You choose the colour before work begins
- We’re fully insured
- A sealant colour to suit the surroundings
FAQs for Southampton
Is Southampton in your area for remedial sealant?
Yes, Southampton is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear quote.
Do you work for landlords with property near St Denys station?
Yes. We work for landlords and agents as well as householders, and several properties can go on one quote. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
How do I get a quote for remedial sealant in Southampton?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Is it messy?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Are you insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Are you an approved applicator?
Yes. We are an ARBOMaster approved applicator.
Someone sealed over the old bead. Can you fix it?
Yes. We cut out all the layers and clean off the film, then the joint is resealed once.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint before we leave.
How the visit works
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The work itself takes a few hours for most joints, depending on how much old sealant has to come out from start to finish. In Southampton, we work in everything from flats and family homes to offices and hotels. Whichever it is, tell us how to get in, where to park and where the work is.
- We look at how the sealant has failed and check for movement or a leak path.
- We strip the joint completely, removing any layers below.
- Next, any mould is treated and the joint dried.
- Where the joint moves, backing and a flexible sealant suited to the movement go in.
- We tool the joint and tell you about anything else that needs attention.
Before we arrive
- Tell us about any water getting in
- Keep children and pets away from the work area
- Clear the area around the work
Get a quote
If you’re in Southampton and need remedial sealant, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
Related advice
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
How to look after the new joints
Aftercare is simple:
- Never seal over old silicone
- Have loose fittings fixed before resealing
- Look for stains below bathrooms now and then
- Keep the room well ventilated
Clean gently: a mild cleaner and a soft cloth, with no blades or scourers.
Warning signs: peeling layers, mould showing through the bead, leaks after showering or cracks in a movement joint. Any of them means it’s time for remedial work.
Honest limits
New sealant cannot fix everything, and we’ll tell you before any work starts. Sealant will not put right:
- A cracked shower tray or bath (that needs repair or replacing)
- Older mastics that may need an asbestos check before removal
- A bath, tray or worktop that moves until it’s properly fixed
Not sure which it is? You can phone 0345 464 0079 or email us and we’ll tell you honestly before you book.
What we seal
- Mouldy bath & shower sealant
- Leaking tray & enclosure joints
- Shrunken worktop sealant
- Failed movement joints
- Expansion joints
- Botched or over-sealed joints
Signs you need remedial sealant in Southampton
Using the wrong product is a common cause: acrylic caulk in a wet area, a general-purpose sealant on a moving joint, or an acetoxy silicone on natural stone or some metals. Each fails in its own way.
The most common problems we see are:
- Kitchen joints letting water behind the worktop
- Mould trapped under a layer of silicone
- Leaks that keep coming back after resealing
- Sealant that came away because the surface wasn’t prepared
For an older house near a landmark such as Saint Mary's, timber floors under older bathrooms flex, so joints need a sealant that moves with them.
Questions to ask before you book
- Whether all the old sealant comes out first
- What the quote includes, VAT included or not
- Who turns up on the day
- What guarantee comes with the work