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

St Ann's washroom sealing

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

  • Washrooms that look worn because of the sealant
  • Failed sealant behind washroom basins
  • A new bead over an old one coming away
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
Constructionline member
Fully insured: £5m PL

Need washroom sealing in St Ann's?

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

Washroom sealing in St Ann's, done properly

In a commercial washroom, sealant is typically 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 once mould grows into it, it can’t be scrubbed out. The fix is to remove it completely and reseal with sanitary silicone containing anti-mould additives. Site teams most often ask us about discoloured joints around urinals and WC pans and a new bead over an old one coming away, on accessible toilets and changing rooms, vanity units and basins and urinals and WCs. Whether you call it commercial sealant work, mastic application or joint sealing, in St Ann's it comes down to the same thing: the right product in a properly prepared joint.

Restaurants, cafés and hotel kitchens across London have joints at worktops, sinks and wall cladding that need to stay smooth and cleanable. We use sanitary and hygienic sealants, choosing food-safe products where food may touch the surface.

Building owners and contractors get the same cover: 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.

The Mastic Doctor team beside their liveried vans in front of an office building
Location
St Ann's (N15, N4, N16)
Wider area
Greater London
Cover
A 12-month guarantee
Price
Quoted before any work starts
Phone
01277 525 020
Page updated
3 November 2026

Signs you need washroom sealing in St Ann's

Mop buckets, trolleys and knocks from users damage joints near the floor at skirting lines, urinal bases and around pans.

It’s worth sending us details if you spot any of the following:

  • Gaps where vanity tops meet the wall
  • Kitchen worktop joints that can’t be kept clean
  • Urinal joints that look unhygienic
  • Washrooms that look worn because of the sealant

Halls of residence and teaching buildings at universities such as American University in London, 1.9 miles south-west of St Ann's, are easiest to reseal during vacations.

Before you book anyone

  • Their pre-qualification and accreditations
  • Their plan for phasing and protecting the area
  • How they handle RAMS and site documents
  • Whether old or failed sealant will be cut out, not overlaid

How to choose a sealant contractor

Wet areas in St Ann's’s workplaces

St Ann's has four care or nursing homes no more than 2 miles away. Assisted bathrooms and wet rooms in care settings need sanitary sealant that stays cleanable. We plan the work with the manager so residents are disturbed as little as possible. London offices and hotels normally can’t close all their washrooms at once, which is why the work is split into phases agreed in advance.

Hotels such as United Lodge Hotel, 0.7 miles south-west of St Ann's, have en suite bathrooms where tired silicone at the bath, tray and basin is replaced room by room. Colleges such as Capital City College (0.6 miles north-east of St Ann's) have toilets, changing rooms and catering kitchens that can be resealed around term dates.

St Ann's is about 2 miles north-west of West Hackney, in Greater London. We cover commercial sites throughout St Ann's. Our Greater London coverage takes in 764 places, large and small. We also cover London, some 6 miles away.

We cover the N15, N4 and N16 postcode districts for washrooms and wet areas. Streets here include Ida Road, Elmar Road and Grove Road, and sites on any of them can send details for a fixed quote. If your building is just outside St Ann's, we cover West Green (1 mile north-west), Seven Sisters (1 mile east), South Tottenham (1 mile east), Harringay (1 mile west) and Tottenham Green (1 mile north-east). Further afield, our area takes in London (6 miles south), City of Westminster (5 miles south-west), Marylebone (5 miles south-west), Kensington (8 miles south-west), St Pancras (4 miles south) and Shoreditch (4 miles south).

Local landmarks in St Ann's

Recent enquiries here include premises near Church of St Andrew, No.8 Seven Sisters pub and Moselle Upper School and the streets around them. Also close by are Chestnuts Park (under half a mile west) and Park View School (0.5 miles north-west). St Ann's has its own railway station: Seven Sisters station. Nearby you’ll also find City of London Maternity Hospital (1.7 miles south-west) and The Mall Wood Green (1.4 miles north-west). The countryside around St Ann's includes Railway Fields and Hollow Pond.

Map of St Ann's © OpenStreetMap contributors

Leave it or put it right?

Bleaching black sealant may lighten it for a few days, but the mould is rooted in the silicone and comes back. Replacement deals with the cause in the joint and cleaners stop fighting a losing battle. Failed sealant in a building in St Ann's can quickly affect neighbours, tenants or the floor below: water travels through shared structures, and a small leak becomes a dispute between occupiers. Putting it right early is less disruptive than dealing with the consequences.

Access can matter as much as the joints themselves: easy-to-reach joints are quicker than those that need equipment to get to. Mention the access as part of your enquiry.

Why clients in St Ann's choose us

  • Over 20 years of commercial sealing
  • Colours chosen to suit frames, cladding or finishes where possible
  • Products installed to the manufacturer’s instructions
  • CHAS accredited contractor

See our cost guide or how we’re accredited.

Different surfaces, different methods

Healthcare and care settings

Assisted bathrooms and accessible toilets get heavy use, so their joints often need renewing sooner.

Basins and vanity tops

Natural stone tops can be marked by acetoxy silicone, so the product is chosen to suit.

How a job runs

Inspect, seal, sign off: every visit follows that pattern. First comes an inspection and agreement on scope, then we prepare and seal each joint with the specified product, and we finish with a walk round so the work can be signed off. Most London premises stay occupied while we are on site, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.

  1. We start by inspecting the fittings and joints and flagging problems sealant can’t solve.
  2. We agree which rooms close and when, so users always have somewhere to go.
  3. We strip out the old bead and clean off the residue left behind.
  4. Each joint is degreased and left dry, because silicone won’t bond to damp or soapy surfaces.
  5. A bead of anti-mould sanitary silicone goes in and is tooled to a smooth, cleanable profile.
  6. You get a reopening time for every room, with signage left up until then.

Getting the site ready

  • Point out parking and an unloading spot
  • Confirm the product named in the specification
  • Warn occupants and staff about the work

Get a fixed quote

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.

Get a quick quote

Read more

Your questions answered

Do you take on jobs in St Ann's where loading and access are tightly controlled?

Yes. Inductions, permits and timed loading are routine for us in London. The building manager’s rules go straight into our method. All of Greater London is inside the ULEZ, and our planning allows for it

Will you plan work around the academic year at somewhere like American University in London?

Yes, holiday working periods are the norm on campus jobs. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

Can you follow the specification on our project?

Yes. Send it with your enquiry, and the quote will be based on it, flagging anything that needs clarifying.

Do you phase washroom resealing?

The work is phased so users always have somewhere to go. One washroom, one bank of cubicles or one changing room is done at a time. Tell us your site hours and access windows and we will plan around them.

What site paperwork can you supply?

Let us know which documents the site needs, such as RAMS, an insurance certificate or CSCS details, and we will confirm them with the quote.

Is any job too small?

Whatever the size, the process is the same: send details, get a fixed quote, we seal, guaranteed.

When is resealing likely to be due?

It depends on movement, UV and weather, cleaning, traffic and the product. Treat them as maintenance items and inspect them regularly.

When to bring in a specialist

Some joints are best left to specialists: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.

General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class.

For managing agents and facilities managers

We work for building owners and managing agents on everything from one building to a spread of sites around St Ann's. One quote can cover more than one site, which keeps the paperwork simple.

If you look after buildings for someone else, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative.

Accreditations

Trusted. Accredited. Insured.