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

Commercial washroom and wet-area sealing in New Cross, Greater London

Sealing in commercial washrooms, showers, kitchens and wet areas in New Cross. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Stained sealant around pans and urinals
  • Sealant stained black around basins and showers
  • Open joints at the base of cubicle panels
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
Constructionline member
£5m public liability

Need washroom sealing in New Cross?

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

Quoting for work in New Cross

To price the job, we consider:

  • How much there is to seal
  • Location, for remote and island sites
  • The size and state of each joint
  • Induction, permit and paperwork requirements

Every site prices differently: joint size, product, access and site hours all play a part. Send the details and a fixed figure follows.

What we need to price the job

For an accurate fixed quote, we need to understand the site. Send us:

  • Specification clauses that apply
  • Any dates the work must fit around
  • Drawings or a marked-up plan, if available
  • Access details, including height

Pricing a project or setting a maintenance budget? We will quote against your scope and drawings you can plan around. If you have questions first, ring 01277 525 020 or email us.

Washroom sealing in New Cross

You can’t shut every toilet in an office, school or hotel at once. Work is phased by room or by section, so staff, guests or pupils always have somewhere to go. Give us your site hours and access windows and the phasing is planned around them. If you have complaints from staff, guests or users about tired washrooms and failed sealant in a tea point or staff kitchen, we can help. For commercial sealant work in New Cross, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.

Many London buildings can’t close every toilet at once. We work through washrooms floor by floor or core by core, at times agreed with you.

Guaranteed is the last step of every job. Our workmanship is backed for 12 months, and the quote explains what it covers.

The Mastic Doctor team standing beside their branded vans outside an office building
Where
New Cross (SE8, SE14, SE4)
Wider area
Greater London
Guarantee
12 months on every job
Quote
A fixed quote before we start
Phone
01277 525 020
Page updated
3 November 2026

Your questions answered

Will our hotel in New Cross need to close for the 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.

Will you plan work around the academic year at somewhere like University of Greenwich - Greenwich Campus?

Yes. We plan campus work around teaching, exams and residence turnarounds. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.

Do you do washroom sealing in healthcare settings?

Yes, healthcare and care settings are part of our work. Any records you need are confirmed with the quote before we start.

Are you CHAS accredited and on Constructionline?

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

What do you charge?

There isn’t a price list, as every site differs. Send photographs or drawings and we’ll price it at a fixed figure.

How long does a typical visit take?

The duration is planned around your programme and the access we’re given. We’ll give you an estimate of time on site when we quote.

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.

Keeping the joints sound

For the best life from the joints:

  • Keep washrooms out of use until we say the sealant has cured
  • Keep extract fans working and vents clear
  • Photograph and log failed joints across the estate
  • Don’t leave an open joint at a basin or tray

Keep extract fans working and vents clear. A room that stays damp will grow mould on almost anything so report fans that aren’t working to your building services team.

Mouldy sealant only gets harder to ignore and users notice. Replacing it early keeps the job to a reseal.

Commercial clients in New Cross

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 New Cross can sit alongside others in a wider programme across Greater London.

FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we will confirm them with the quote.

Surface by surface

Showers and trays

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

Wet-room floors and floor-to-wall joints

Wet floors are common in accessible showers and changing rooms, so their perimeter joints get close attention.

Washroom sealing in New Cross: the local picture

Three care or nursing homes sit less than 2 miles from New Cross. In care settings, wet rooms, assisted bathrooms and en suites rely on clean, sound sealant. Work is agreed with the manager, around residents’ routines. A 2-mile radius around New Cross takes in a good number of hotels. Hotel en suites take daily use, and tired silicone at trays and basins is one of the first things guests notice. The work can go floor by floor, agreed with housekeeping.

For a campus such as University of Greenwich - Greenwich Campus, 1.4 miles to the north-east of New Cross, showers in residences and washrooms in teaching blocks can be programmed around term dates. Toilets at places like New Cross Gate Retail Park (to the north-west of New Cross) are cleaned constantly, which is hard on silicone. For a hotel such as Peckham Rooms Hotel, 1.3 miles west of New Cross, resealing en suites a few rooms at a time keeps the rest available.

New Cross is about 3 miles south-east of London, in Greater London. Businesses, contractors and managing agents in New Cross use us for work on washrooms and wet areas. New Cross is one of 764 places in Greater London on our list for washrooms and wet areas.

We cover the SE8, SE14 and SE4 postcode districts for washrooms and wet areas. Streets here include Ivy Road, Mona Road and Avon Road, and sites on any of them can send details for a fixed quote. You’ll find New Cross on or near the A2209 and A2210. If your building is just outside New Cross, we cover St Johns (1 mile east), Telegraph Hill (1 mile south-west), Deptford (1 mile north-east), Nunhead (1 mile south-west) and Lewisham (1 mile south-east). Nearby towns on our patch include London (3 miles north-west), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (8 miles west), St Pancras (5 miles north-west) and Shoreditch (4 miles north-west).

Around New Cross

Locally, jobs take us to sites close to Wickham Arms, Fordham Park and Addey and Stanhope School and the streets around them. Other local landmarks include St. Paul's (0.7 miles north-east) and Laban Centre (0.9 miles north-east). There’s a railway station in New Cross itself: New Cross station. Nearby you will also find Fan Museum (1.2 miles north-east) and Greenwich Castle (1.5 miles east). Green spaces nearby include St. James's Park Lake and Tower Hill.

Map of New Cross © OpenStreetMap contributors

From enquiry to sign-off

We follow your site rules from the start: signing in, inductions and any permit to work. Once we are cleared to begin, the joints are worked through in the order agreed with your site contact, and each area is checked before we leave it. All of Greater London is in the ULEZ, and kerbside space in New Cross can be scarce. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.

  1. Every washroom is checked joint by joint, with loose panels, leaks or damp noted for the right trade.
  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. We clean and dry every surface so the new sealant can grip.
  5. We lay a sanitary silicone bead and tool it smooth so it is easy to clean.
  6. You get a reopening time for every room, with signage left up until then.

Before we start on site

  • Point out parking and an unloading spot
  • Send asbestos survey details if the building is pre-2000
  • Warn occupants and staff about the work

Getting a fixed quote

We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To start the process, call 01277 525 020 or email a schedule or drawings.

Ask for a quote

Related advice

Why act early in New Cross

Running fresh silicone along a failed bead hides the problem briefly. It doesn’t bond, so it peels and traps dirt behind it. Cutting out completely and cleaning back takes a little longer and lasts. Access in London is hard enough to arrange once, so it makes sense to deal with every failing joint while access is in place.

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

Why clients in New Cross choose us

  • Over 20 years of commercial sealing
  • Constructionline member
  • One contact handling all your sites
  • Fixed quotes based on photographs, drawings or a visit

See how commercial sealant jobs are priced and our accreditations and insurance.

Accreditations

Trusted. Accredited. Insured.