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

Washroom Sealing in Hampstead

Sealant work in Hampstead for main contractors, managing agents and facilities managers: sealing in commercial washrooms, showers, kitchens and wet areas, with a fixed quote first.

  • Failed sealant behind washroom basins
  • Split or peeling sealant at shower trays
  • Sealant stained black around basins and showers
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS & Constructionline
£5m public liability

Washroom sealing in Hampstead

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

About our washroom sealing in Hampstead

In a commercial washroom, sealant is usually the first thing to wear out. Around basins, urinals, cubicles, IPS panels and shower trays it takes water, soap, cleaning chemicals and knocks every day and mould that roots into it can’t be cleaned away. We strip it out and lay new anti-mould sanitary silicone. We work on IPS panels and cubicles, showers, trays and wet room floors and vanity units and basins, and the failures we are asked to look at most are failed joints along IPS and cubicle panels and stained sealant around pans and urinals. For commercial sealant work in Hampstead, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.

In Hampstead, as across London, commercial kitchens and washrooms need sealed joints that can be cleaned properly. We use sanitary and hygienic sealants, choosing food-safe products where food may touch the surface.

Whoever the client is, the cover is the same: twelve months on the work we carried out. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.

Place
Hampstead (NW3, NW6, NW11, N2)
Wider area
Greater London
Guarantee
12 months on every job
Quote
Quoted before any work starts
Telephone
01277 525 020
Page updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Aftercare for building managers

Sealant joints are maintenance items, and how long they last depends on how they’re treated. We suggest:

  • Note failing joints building by building
  • Leave signs up until the cure time is over
  • Don’t leave an open joint at a basin or tray
  • Tell us about infection-control or permit rules before we quote

Include sealant joints in your planned maintenance checks. 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

Wet-room floors and floor-to-wall joints

Changing rooms and accessible showers often have wet floors, so their perimeter joints get close attention.

Healthcare and care settings

Assisted bathrooms and accessible toilets get heavy use so their sealant tends to fail sooner.

Honest limits

Honesty saves time and money. New sealant won’t cure:

  • Condensation from failed extract fans
  • Swollen or delaminated boards behind panels or vanity tops
  • Loose panels, vanity units or tiles, which need fixing first

Not sure which it is? You can phone 01277 525 020 or use the quote form and we will tell you honestly before you book.

Where we work in Hampstead

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

How a job runs

We begin with a short walk round with whoever looks after the building, agreeing which joints are in scope, where to start and what must stay open. Then we strip out anything that has failed, prepare every joint and seal it. In Hampstead, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Phased work keeps the rest of the building in use.

  1. We inspect each washroom and record the joints to be resealed.
  2. The fixed quote sets out the rooms, the products and the phasing.
  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. Each area is handed back when ready.

What we need from you

  • Tell staff and tenants when we will be in
  • Point out parking and an unloading spot
  • Move anything stored against the joints

Getting a fixed quote

Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to call 01277 525 020 or send details through our quote form with what you know.

Ask for a quote

Read more

Your questions answered

Can you work in a care home near Hampstead with residents in?

Yes. Care settings are planned area by area, at times agreed with the home. Tell us about any infection-control or safeguarding requirements and we will work to them.

Can work at a site such as Regent's University London fit around teaching?

Yes, holiday working periods are the norm on campus jobs. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.

Are you CHAS accredited?

Yes. We’re CHAS accredited, we are a Constructionline member and we use CSCS-carded applicators.

Which silicone is right for commercial washrooms?

It depends on the joint. Washrooms and showers take anti-mould sanitary silicone, and food areas take a hygienic, food-safe sealant where food contact is possible.

What happens if old sealant might contain asbestos?

The duty to manage asbestos sits with the building’s dutyholder, so we will ask for the register before work on an older building. Work pauses if suspect material is found, until it has been tested.

What site paperwork can you supply?

Each site asks for different documents, so list what you need, whether RAMS, insurance or CSCS details, and we’ll confirm with the quote.

Do you have public liability insurance?

Yes. Our insurance certificate can be sent alongside the quote.

Work for main contractors and building owners

As a CHAS accredited contractor and Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.

Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.

Do you need washroom sealing in Hampstead?

Daily commercial cleaning wears sealant faster than people expect. Harsh products, abrasive pads and pressure washing break down a joint’s surface and edges, and dirt and mould then get a foothold.

Clients usually get in touch after noticing something like this:

  • Split or peeling sealant at shower trays
  • Gaps where vanity tops meet the wall
  • Urinal joints that look unhygienic
  • Users noticing mouldy joints

At a college such as City of Westminster College, which lies south of Hampstead, washroom and kitchen sealant is best renewed in the holidays or in phases during term.

Questions to ask before you book

  • Is the sealant right for the movement and the substrate?
  • Their approach to joint depth and backing
  • Whether old or failed sealant will be cut out, not overlaid
  • Do they follow the manufacturer’s priming guidance?

Our contractor checklist

Busy facilities in and around Hampstead

Hampstead has four care or nursing homes no more than 2 miles away. In care settings, wet rooms, assisted bathrooms and en suites rely on clean, sound sealant. We plan the work with the manager so residents are disturbed as little as possible. Busy London buildings need some toilets open at all times, so we phase the work core by core or floor by floor with the building manager.

Office toilets at parks like The Quadrant Business Centre (to the south-west of Hampstead) take steady weekday use, and mouldy silicone soon shows. Student showers at universities like Regent's University London (2.1 miles south-east of Hampstead) see more use than most, and their silicone shows it.

Hampstead is about 3 miles north-west of City of Westminster, in Greater London. Commercial clients in Hampstead can call on us for washrooms and wet areas, as part of our coverage of Greater London. Hampstead is one of 764 places we cover in Greater London for washrooms and wet areas.

Work on washrooms and wet areas is covered throughout NW3, NW6, NW11 and N2, for business premises of every kind. Buildings on Hampstead High Street, New End Square and The Mount Square are within our area for washrooms and wet areas. Main routes into Hampstead include the A1 and A502. Just outside Hampstead, we also work in Greenhill (1 mile north-east), West Hampstead (1 mile west), Fortune Green (1 mile west), Vale of Health (1 mile north) and South Hampstead (1 mile south). Nearby towns on our patch include London (5 miles south-east), City of Westminster (3 miles south-east), Marylebone (3 miles south-east), Kensington (4 miles south), St Pancras (3 miles south-east) and Shoreditch (5 miles south-east). Among the larger centres in Greater London is Hampstead, and we take on washrooms and wet areas for its commercial and public buildings.

Near you in Hampstead

We work on buildings around South Hampstead High School, Kilburn Grange Park and St Anthony's Preparatory School. You will also find King William IV Public House (under half a mile north-east) and Cecil Sharp House (1.7 miles south-east). Hampstead has its own railway station: Finchley Road & Frognal station. Well-known places in the area include Isokon Gallery (0.8 miles east) and New End Hospital (less than half a mile north). Not far away are Belsize Wood and The Long Water.

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