Dundee · Scotland
Remedial Sealant in St Marys
Specialist remedial sealant for St Marys: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Sealant peeling off a dusty or damp surface
- Movement joints that have split or pulled away
- Mould trapped under a layer of silicone
Do you need remedial sealant in St Marys?
Water from somewhere else can ruin a good seal. A leaking valve, a failed waste or cracked grout feeds water behind the bead, and the sealant lifts or goes mouldy from underneath.
Signs it’s time to call us include:
- A second bead peeling off the first
- Dark patches showing through the sealant
- Floor or wall movement joints that have failed
- Repeat leaks from the same joint
Schools such as Lawside Academy are buildings too, and we reseal washrooms and kitchens in schools and businesses as well as homes.
Comparing quotes
- What happens if the job turns out different
- What insurance they hold
- Which sealant they’ll use, and why
- What the cure time is
Remedial sealant for homes and businesses in St Marys
Two decades of sealant work means we recognise most failures quickly. We are fully insured ARBOMaster approved applicators, and every remedial job comes with a 12-month guarantee. We work on mouldy bath & shower sealant, shrunken worktop sealant and expansion joints, and common reasons people get in touch are kitchen joints letting water behind the worktop and sealant applied over old sealant that has lifted.
St Marys is in one of Scotland’s four big cities, where many tenement bathrooms were fitted into rooms that weren’t built for them. Space is tight and ventilation can be poor, which is hard on sealant and grout.
A one-year guarantee comes as standard, so you are not left on your own once the job is done.
- Place
- St Marys (DD3, DD2)
- Wider area
- Dundee
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
What the job involves on each surface
Mouldy bath & shower sealant
Where mould keeps coming back, ventilation is generally part of the cause. Along with resealing, we’ll mention if the room needs better ventilation.
Movement & expansion joints
A sealant stuck to the back of the joint can’t stretch. Backing stops that, so the sealant grips the two sides only.
Landlords, agents and businesses in St Marys
We also work for property managers and facilities teams in St Marys and across Dundee. We can quote a run of properties together.
If you manage several properties in or around St Marys, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
Can I do it myself?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
What remedial sealant looks like in St Marys
St Marys is within about 3 miles of the coast. Near the coast, holiday lets and guest houses can see bathrooms used by one guest after another, which wears sealant and grout out faster than in a quiet home. Private landlords in Scotland must be registered and meet the Repairing Standard, which includes keeping fixtures and fittings in reasonable repair. Failed sealant around a bath or shower is worth sorting between tenancies.
Rented homes near Invergowrie station change hands often, and a joint that keeps failing is best fixed properly while the property is empty.
St Marys is about 2 miles north-west of Dundee, in Dundee. We carry out remedial sealant for homes and businesses in St Marys and nearby, as part of our work across Dundee. 50 places in Dundee are on our list.
Work in DD3 and DD2 is quoted and booked the same way as anywhere else. Whether your property is on Troon Road, Troon Avenue and Gullane Road or a nearby road, our applicators can take on the job. Close by, we work in Ardler (1 mile south), Dryburgh (1 mile south), Camperdown (1 mile south-west), Lochee (1 mile south) and Birkhill (2 miles west). Larger places within reach include Broughty Ferry (6 miles east), Stobswell (3 miles south-east), Monifieth (7 miles east), Barnhill (6 miles east), Pitkerro (3 miles east) and Whitfield (3 miles east). St Marys is one of the larger places we cover in Dundee.
Near you in St Marys
Locally, jobs take us to homes and businesses close to Cox Branch Library and Balgay Hill. The closest station to St Marys is Invergowrie station, roughly 3 miles south-west of the centre. Nearby you’ll also find Wellgate Centre (2.6 miles south-east) and Strathmartine Castle (1.5 miles north). Open spaces near St Marys include Balgay Hill and Trottick Mill Ponds.
What happens on the day
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes a few hours for a typical bath or shower, longer where several layers have been applied. In a Scottish city, a lot of jobs are in tenement flats, up a common stair from a shared close. In St Marys, it helps to know the floor, the door entry arrangements and the nearest parking.
- The failure is looked at first, so we know whether it’s sealant, movement or water from elsewhere.
- 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 are told about anything else we found.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know about parking restrictions
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, email us at info@mrmastic.co.uk.
Related advice
When it is not the sealant
In fairness, there are a few things sealant will not fix:
- Old mastic in a building from before 2000 that should be checked for asbestos before it’s disturbed
- Movement from fittings that aren’t supported
- A leaking trap, valve or supply pipe
If in doubt, email us at info@mrmastic.co.uk and we’ll say what we think.
Where we work in St Marys
- Expansion joints
- Leaking tray & enclosure joints
- Mouldy bath & shower sealant
- Shrunken worktop sealant
- Failed movement joints
- Botched or over-sealed joints
Why deal with it now?
Hidden water does the most damage: soaked floorboards, ceiling stains below and blown plaster. Dealing with the joint now is a small job by comparison. Scottish rain finds any gap around a frame or wall joint, and in a tall building in St Marys, damp can travel a long way before it shows.
Combining jobs into one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We’ll give you a clear quote for the lot.
Why book with us
- We’re fully insured
- A 12-month guarantee on all work
- Experience in homes, commercial sites and hotels
- Neat joints and a tidy finish
Also near St Marys
Other services in St Marys
St Marys questions
Can you do remedial sealant in St Marys?
Yes. We work across all of Scotland, and St Marys is part of that. You can send an email to info@mrmastic.co.uk and tell us what needs doing, and we will send you a clear quote.
Can a failed shower seal in a tenement flat in St Marys leak into the flat below?
Yes, and the first sign is often a mark on the ceiling below. A proper reseal, with all the old sealant cut out, stops it at the source.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
What do you need from me for a quote?
Tell us what needs doing and where, with pictures by email if possible. We will ask anything else we need to know.
Are you fully insured?
Yes. Mr Mastic is fully insured.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we are using.
Can landlords and businesses book you?
Yes. We work in homes, commercial premises and hotels.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used before we leave.