The Mastic Doctor team standing beside their branded vans outside an office building
Greater London · England

St George's Fields washroom sealing

Sealing in commercial washrooms, showers, kitchens and wet areas in St George's Fields. CHAS accredited and fully insured, with a 12-month guarantee.

  • Black mould inside silicone joints that cleaning can’t shift
  • Kitchen worktop joints that can’t be kept clean
  • Split or peeling sealant at shower trays
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
CHAS & Constructionline
£5m public liability

Washroom sealing in St George's Fields

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Washroom sealing for commercial buildings in St George's Fields

In healthcare and care settings, sealing is part of keeping surfaces cleanable. Your estates and infection-control requirements, and any permits the site uses, shape how we work. Tell us what records you need and we will confirm with the quote. If you are dealing with mould spotting along silicone joints and washrooms that look worn because of the sealant, we can help, whatever the surface. Most enquiries from St George's Fields start with one failed joint and grow into a wider look at the building: we check the joints around it and give you an honest view of what needs doing now and what can wait.

Many London buildings can’t close every toilet at once. Washrooms are done core by core or floor by floor, with signage and a plan agreed beforehand, so staff and visitors can always find an open washroom.

Every job is signed off with a 12-month guarantee. It’s a plain promise: if our work fails within that year, we put it right.

Place
St George's Fields (SE1, SE11, SE17)
Wider area
Greater London
Guarantee
A 12-month guarantee
Quote
A fixed quote before we start
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Building owners, agents and FMs in St George's Fields

We take on planned maintenance as well as one-off repairs: working through a building or an estate in stages that fit your budget. Sites in St George's Fields can sit alongside others in a wider programme across Greater London.

FMs need a contractor who is easy to get on site. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.

On site: what to expect

A typical day starts with protection: tape along each joint edge and covers over finishes, stock and equipment close by. On site, the work normally takes between a morning and a week or so, set by the number of rooms and the phasing you need, and we clear our waste as we work. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.

  1. We agree which washrooms close and when.
  2. Leaks, loose panels or damp are pointed out first.
  3. Old sealant is stripped and the faces prepared.
  4. We reseal with the grade suited to each area.
  5. We give you a reopening time for every room.

Getting the site ready

  • Arrange parking or a loading space
  • Confirm the product named in the specification
  • Move anything stored against the joints

Request a quote

If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price against exactly what is specified. For smaller jobs, photos and a description will do.

Ask for a quote

Related advice

Keeping St George's Fields washrooms open while we work

A 2-mile radius around St George's Fields takes in a good number of hotels. En suite bathrooms, staff changing rooms and kitchens all need their sanitary silicone renewed in time. The work can go floor by floor, agreed with housekeeping. In London buildings, toilets and showers generally need to stay partly open, so we take one block of facilities out of use at a time.

For centre management at a site such as Southernwood Retail Park (1.5 miles south-east of St George's Fields), washroom work is planned around footfall. Student showers at universities like London South Bank University (to the south-east of St George's Fields) see more use than most, and their silicone shows it. Clinical washrooms at sites like Evelina London Children's Hospital (to the west of St George's Fields) are scheduled with the ward so the room is out of use for as little time as possible.

St George's Fields is about 1 mile west of London, in Greater London. Anywhere in SE1, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. St George's Fields is one of 764 places we cover in Greater London for washrooms and wet areas.

Postcode districts covered here: SE1, SE11 and SE17. For a building on York Road, Spur Road and Bear Lane or nearby, send details and we’ll quote for washrooms and wet areas. Access to St George's Fields is via the A300 and A302 among other routes. Sites close to St George's Fields are covered too, including Elephant and Castle (1 mile south-east), Newington Butts (1 mile south-east), Vauxhall (1 mile south-west), Lambeth (1 mile south-west) and Westminster (1 mile west). Further afield, our area takes in Kensington (4 miles west), Walthamstow (7 miles north-east), Hoxton (3 miles north), Hampstead (5 miles north-west), Ruislip (14 miles west) and Brompton (3 miles west).

Near you in St George's Fields

Around St George's Fields, our work takes us to commercial buildings near The Duke Of Clarence Public House, London School of Musical Theatre and Lambeth Palace Library, among other places. Other local landmarks include Notre Dame Roman Catholic Girls' School (less than half a mile south-west) and Geraldine Mary Harmsworth Park (less than half a mile south-west). There’s a railway station in St George's Fields itself: Elephant & Castle station. Well-known places in the area include Baynard's Castle (0.9 miles north) and General Lying-In Hospital (0.5 miles west). The countryside around St George's Fields includes Bellenden Road Nature Garden and St. James's Park Lake.

Map of St George's Fields © OpenStreetMap contributors

When to bring in a specialist

There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and our CSCS-carded applicators are used to working under those rules.

What you see is the finished bead, but most of the work is hidden. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.

Questions we are asked in St George's Fields

Can you work in a London building with booked loading and goods-lift slots?

Yes, we plan every London job around the building’s own access rules. Send the building rules and access times with your enquiry. All of Greater London is inside the ULEZ, and our planning allows for it

Must a hotel around St George's Fields close while you work?

In the majority of cases no closure is needed: we work room by room or floor by floor. Housekeeping and our team agree each day’s rooms.

Do you use special sealant for toilets and showers?

An anti-mould sanitary silicone for most washroom joints. Neutral-cure grades are used where acetoxy types could mark metals, stone or mirror backings.

Do you have public liability insurance?

Yes. We are fully insured, and the certificate can go with your quote.

Can weather delay the job?

It can, when the joints are outside. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so we watch the forecast and rearrange outside work if we have to. Internal work is far less affected.

Do you hold CHAS accreditation?

Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.

How many days will you need on site?

It depends on the scope, though a typical visit typically takes between a morning and a week or so, set by the number of rooms and the phasing you need. For bigger or phased jobs, we’ll set out a timescale with the quote.

Honest limits

Before quoting, we check that sealant is the right answer. It isn’t the answer for:

  • Leaks through tanking or membranes below the finishes
  • Loose panels, vanity units or tiles, which need fixing first
  • A dripping waste or valve behind a panel

Not sure which it is? You can phone 01277 525 020 or email a schedule or drawings and we will tell you honestly.

Joints and surfaces we work on

  • IPS panels and cubicles
  • Kitchens and tea points
  • Accessible toilets and changing rooms
  • Showers, trays and wet room floors
  • Vanity units and basins
  • Urinals and WCs

After the work

Sealant joints are maintenance items, and their life depends on movement, exposure, cleaning and use. Our advice:

  • Tell us about infection-control or permit rules before we quote
  • Don’t leave an open joint at a basin or tray
  • Avoid scourers and harsh descalers on silicone
  • Respect the cure time before reopening each room

Add washroom sealant to routine inspections. Check for mould spots, splits, lifting edges and open joints at trays, basins and urinals and log what you find.

Water getting behind IPS panels and vanity units can swell the boards. After that, those parts need replacing rather than resealing.

Different surfaces, different methods

Showers and trays

A tray flexes every time it’s used and is constantly wet. Tray perimeters are a frequent source of leaks.

Basins and vanity tops

Basin joints get wet every time someone washes their hands, so the wall joint and bowl surrounds tend to fail before anything else. They are resealed with anti-mould sanitary silicone.

Accreditations

Trusted. Accredited. Insured.