The Mastic Doctor team standing beside their branded vans outside an office building
Dundee · Scotland

Washroom Sealing contractors in St Marys

Washroom sealing for St Marys, from a contractor working since 2005. Fully insured and CHAS accredited.

  • Open joints along basins and vanity units
  • Failed sealant in a tea point or staff kitchen
  • Shower tray joints that have opened up
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
London, the South East & Scotland
CHAS accredited
£5m public liability

Need washroom sealing in St Marys?

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

For managing agents and facilities managers

Agents, factors and owners’ representatives all follow the same route: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.

For main contractors, we work as the sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules.

Washroom sealing in St Marys, done properly

Closing all the facilities in a building isn’t an option. We phase the work one washroom, one bank of cubicles or one changing room at a time, so staff, guests or pupils always have somewhere to go. Tell us your site hours and access windows and we will plan around them. We work on vanity units and basins, kitchens and tea points and showers, trays and wet room floors, and what we’re called in for most is gaps where vanity tops meet the wall and resealing that didn’t last because the old bead stayed. For commercial sealant work in St Marys, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.

Scottish city buildings, from student residences to hospitals and offices, are full of washrooms and wet areas. We reseal them in phases, agreed with the estates or facilities team.

The 12-month guarantee is for workmanship rather than wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we’re clear about what is covered before work starts.

Mastic Doctor team members lined up next to their branded vans outside an office building
Location
St Marys (DD3, DD2)
Wider area
Dundee
Guarantee
12 months on our workmanship
Quote
Fixed quote, scope in writing
Telephone
01277 525 020
Updated
3 November 2026

Common problems we fix in St Marys

Much of the failed sealant we remove was applied over old silicone or residue. Silicone won’t adhere to a silicone bead, so it soon lets go.

Most enquiries start with one or more of the following:

  • Mould spotting along silicone joints
  • Stained or open joints at kitchen sinks and worktops
  • Washrooms that look worn because of the sealant
  • Stained sealant around pans and urinals

Toilets at colleges like Dundee and Angus College - Kingsway Campus, 1.6 miles to the east of St Marys, take heavy use from students and staff alike.

What to look for in a quote

  • Whether primer will be used where the manufacturer specifies it
  • Their plan for phasing and protecting the area
  • Which product they’ll use, and why it suits the joint
  • Who will actually carry out the work

How to choose a sealant contractor

Why it’s worth doing now in St Marys

Sealing on top of old silicone saves nothing. Silicone won’t grip silicone, so it lifts and holds moisture underneath. Cutting out completely and cleaning back takes a little longer and lasts. Failed sealant in a shared building in St Marys can affect more than one owner. Fixing it promptly keeps repairs small.

Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits.

Why appoint us

  • Fully insured
  • A fixed quote before work starts
  • Failed material removed, not covered up
  • Matching to RAL references, product permitting

Take a look at our cost guide or our accreditations and insurance.

Questions we are asked in St Marys

Do you take on work at healthcare sites like Kings Cross Hospital?

Yes, provided the work is planned with the site’s estates team. The estates team’s permit system and infection-control rules come first, and the work is planned around them.

Can you work in a care home near St Marys with residents in?

Yes. We work around residents’ routines, a room or two at a time. We follow the home’s own procedures throughout.

Can weather delay the job?

For external joints, yes. Sealant needs a dry joint and a temperature within the product’s range, so damp, frosty or very cold days can stop external work. Internal work is rarely affected.

Are your applicators CSCS-carded?

Yes. We use CSCS-carded applicators, which many sites require.

When can the area be used after sealing?

Curing time varies by product, and we confirm it on the day, and flag anything to keep off until it has cured.

Is old silicone taken out first?

The failed bead is always removed. Fresh silicone can’t key to an old bead, so sealing over it soon peels.

Are you insured?

Yes. We’re fully insured, including public liability cover.

Washroom sealing around St Marys: points for this area

With the shore within about 3 miles, St Marys counts as a coastal location, and places by the sea often rely on visitors, so their hotels and holiday lets see heavy seasonal use. Washrooms used guest after guest wear their sanitary silicone faster, which is why off-season resealing makes sense. St Marys is in the east of Scotland, which is drier than the west. Inside, ventilation and use decide how fast washroom sealant moulds, whatever the weather.

On an industrial estate such as Dryburgh Industrial Estate, which lies south of St Marys, staff toilets, showers and canteens are where sanitary sealant takes the most wear. Clinical washrooms at sites like Kings Cross Hospital (to the south-east of St Marys) are scheduled with the ward so the room is out of use for as little time as possible.

St Marys is about 2 miles north-west of Dundee, in Dundee. Any commercial site in St Marys is covered, for single jobs and planned programmes alike. Our Dundee coverage takes in 28 places.

Work on washrooms and wet areas is covered throughout DD3 and DD2. If your site is on Troon Road, Troon Avenue and Gullane Road or close by, send details and we will quote for washrooms and wet areas. Close to St Marys, our area also takes in Ardler (1 mile south), Dryburgh (1 mile south), Camperdown (1 mile south-west), Lochee (1 mile south) and Birkhill (2 miles west). A short drive away, we cover Broughty Ferry (6 miles east), Stobswell (3 miles south-east), Barnhill (6 miles east), Pitkerro (3 miles east), Whitfield (3 miles east) and West End (3 miles south).

Around St Marys

In St Marys, that means premises near Cox Branch Library and Balgay Hill. The closest station to St Marys is Invergowrie station, about 3 miles south-west. A little further out are Wellgate Centre (2.6 miles south-east) and Strathmartine Castle (1.5 miles north). Not far away are Balgay Hill and Trottick Mill Ponds.

Map of St Marys © OpenStreetMap contributors

Quoting for work in St Marys

A fixed quote reflects the actual work. It allows for:

  • Specialist products, such as fire-rated or hygienic sealants
  • Travel to remote or island sites
  • Induction, permit and paperwork requirements
  • Whether the work must be split into stages

Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.

Sending details for a quote

Diagnosis starts before we arrive. Let us know:

  • Any dates the work must fit around
  • How the joints are reached, and at what height
  • Whether the building will be occupied during the work
  • Drawings or a marked-up plan, if available

A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Share whatever details you have and we will fill any gaps with a visit.

Looking after the joints

Every sealant joint needs some looking after, and how long they last depends on how they’re treated. Our advice:

  • Clear standing water from shower floors where possible
  • Keep washrooms out of use until we say the sealant has cured
  • Brief cleaning staff to treat joints gently
  • Don’t leave an open joint at a basin or tray

Any failure in our workmanship within the 12-month guarantee is ours to put right. After that, a routine look catches failing joints early.

Leaks through tray and wet-floor joints can go unseen until a ceiling marks below. By then, other trades may be needed as well so failed joints are worth acting on quickly.

Diagnose, treat, sign off

We bring the products specified for the job, along with primers and backing rod. Any old material is cut back to clean, sound faces, primer goes on where the manufacturer specifies it, and each bead is tooled to a neat concave finish. In a Scottish city, kerbside space and loading need planning, especially near the centre. Shared closes, stairs and the property factor may need to be part of the plan.

  1. We inspect each washroom and record the joints to be resealed.
  2. You get a fixed quote with the phasing plan.
  3. The whole of the old bead is removed.
  4. Joints are degreased and dried.
  5. A sanitary silicone bead is laid and given a smooth tooled finish.
  6. Rooms reopen after the cure time.

Getting the site ready

  • Have the specification and drawings to hand
  • Make sure the joints can be reached
  • Explain the parking and delivery arrangements

Quotes

Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, ring 01277 525 020 or email drawings and photos.

Get a price

Related advice

Accreditations

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