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

Commercial washroom and wet-area sealing in Kemsing, Kent

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

  • Sealant stained black around basins and showers
  • Failed joints along IPS and cubicle panels
  • Discoloured joints around urinals and WC pans
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Signed off, with 12 months’ guarantee.
London, the South East & Scotland
Constructionline member
£5m public liability

Washroom sealing for businesses in Kemsing

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

From enquiry to sign-off

We begin with a short walk round with whoever looks after the building, to confirm the scope, the order of work and any areas we must keep clear. Then we strip out anything that has failed, prepare every joint and seal it. What matters most for a job in Kemsing is a clear list of what needs doing, so send photos of each area. A fixed quote follows.

  1. Every washroom is checked joint by joint, with loose panels, leaks or damp noted for the right trade.
  2. A phasing plan keeps part of the building’s facilities in use at all times.
  3. The failed silicone is stripped and every face scraped clean of residue.
  4. We clean and dry every surface so the new sealant can grip.
  5. A bead of anti-mould sanitary silicone goes in and is tooled to a smooth, cleanable profile.
  6. Each room is handed back once the sealant has had its cure time.

What we need from you

  • Clear stock, furniture or equipment away from the joints
  • Send any specification or drawings in advance
  • Let building users know which areas are affected

Ask for a quote

We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To ask for one, phone 01277 525 020 or send photos by email.

Get a price

Advice

Washroom sealing for commercial buildings in Kemsing

You can’t shut every toilet in an office, school or hotel at once. Work is phased by room or by section, so there are always facilities in use. Give us your site hours and access windows and the phasing is planned around them. If you’re dealing with urinal joints that look unhygienic and failed sealant in a tea point or staff kitchen, we can put it right, on vanity units and basins, IPS panels and cubicles and urinals and WCs alike. Whether you call it commercial sealant work, mastic application or joint sealing, in Kemsing it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.

In a smaller place such as Kemsing, commercial washrooms tend to be in schools, pubs, cafés, surgeries, care homes and sports clubs. They don’t need a big crew, but they do need old sealant fully cut out before anti-mould silicone goes on.

Our 12-month guarantee is about workmanship, not wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we spell out the cover before we begin.

Place
Kemsing (TN15)
Region
Kent
Guarantee
12 months on every job
Quotes
Quoted before any work starts
Phone
01277 525 020
Updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Owners, agents and contractors

When you manage a building on behalf of an owner, clear figures and clear communication matter. You get a fixed quote, an agreed scope and a walk round at the end.

We work for building owners and managing agents on everything from one building to a spread of sites. One quote can cover more than one site, so there’s one set of paperwork to deal with.

Your questions answered

Will the toilets in our Kemsing building be out of use?

Rarely all at once: work is phased so some facilities are always available. Each area is handed back once the sealant has cured enough to use.

Is Kemsing too far out for you?

No. Small places get the same service as large ones. London and every South East county are within our area. Where we can, we group nearby jobs to make the most of each trip.

Is colour matching possible?

In many cases, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We will confirm the colours available for the specified product.

What do you charge?

That depends on the job: quantities, access, the product and any phasing. Call for a fixed quote.

Are you CHAS accredited?

Yes. Mastic Doctor is CHAS accredited and a Constructionline member, which helps with supplier vetting.

How long do sealant joints last?

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

Is there a guarantee on the work?

A 12-month guarantee covers the work. It covers our workmanship rather than damage, leaks from plumbing or ventilation problems.

Washroom sealing in Kemsing: the local picture

At about 19 miles from central London, Kemsing is within reach of the capital. Washrooms in commuter-belt offices take constant weekday traffic, and resealing in phases keeps facilities available.

Church halls and community buildings, such as those at Church of St Mary, have kitchens and toilets used by many groups, and their sanitary sealant works hard. Schools such as Kemsing Primary School have toilets, changing rooms and kitchens that are best resealed in the holidays. On a healthcare site such as Sevenoaks Hospital, 1.6 miles to the south-west of Kemsing, washroom work starts with the infection-control team’s sign-off.

Kemsing is about 2 miles north-east of Sevenoaks, in Kent. Our applicators travel to Kemsing for work on washrooms and wet areas, handled exactly as we handle every other area. Our Kent coverage takes in 931 places. There’s a separate page for London, roughly 19 miles from Kemsing.

We take on washrooms and wet areas across the TN15 postcode area, for business premises of every kind. Among the streets we cover are High Street, Copperfields Walk and Childsbridge Lane, and sites on any of them can send details for a fixed quote. Sites close to Kemsing are covered too, including Cotman's Ash (1 mile north-east), Heaverham (2 miles east), Woodlands (2 miles north-east), Romney Street (2 miles north) and Knatts Valley (2 miles north-east). A short drive away, we cover Maidstone (14 miles east), Dartford (9 miles north), Royal Tunbridge Wells (12 miles south), Gravesend (11 miles north-east), Tonbridge (8 miles south) and Northfleet (10 miles north-east).

Near you in Kemsing

Around Kemsing, our work takes us to commercial buildings near St Michael's Preparatory School, Knole Academy and Kemsing Down. For rail, the closest station is Otford station, about 1 mile north-west of the centre. Other landmarks nearby include Kemsing Castle Bank (0.5 miles east) and Otford Heritage Centre (1 mile west). Open spaces near Kemsing include Dryhill Nature Reserve.

Map of Kemsing © OpenStreetMap contributors

What the job involves on each surface

Urinals and WC pans

Joints around urinals and WC pans take splashes, cleaning chemicals and knocks. Stained or split joints here trap smells and make the room look neglected.

Showers and trays

A tray flexes every time it’s used and is constantly wet. Tray joints are where many washroom leaks start.

What we can’t put right

Some faults sit outside our scope, and we point that out rather than sealing over them:

  • Mould caused by poor ventilation, which will return until the extract is fixed
  • Fittings that move too much to hold a bead
  • A dripping waste or valve behind a panel

If you’re not sure, just speak to us on 01277 525 020 or use the quote form and we will give you a straight answer before you book.

Where we work in Kemsing

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

Should maintenance staff do it?

Certain joints really need a specialist: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong usually costs more in the end than doing them right.

The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.

Cost factors for washrooms and wet areas

To price the job, we consider:

  • How much there is to seal
  • The size and state of each joint
  • Whether old sealant has to be cut out first
  • Location, for remote and island sites

We don’t publish prices, because the scope varies so much from one building to the next. Call for a quote.

Sending details for a quote

It doesn’t need to be a full survey. These details are enough to start:

  • Approximate linear metres or a joint schedule
  • Any specification or named product
  • A wide shot and a close-up of the area
  • The postcode of the building

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, phone 01277 525 020 or send photos by email.

Accreditations

Trusted. Accredited. Insured.