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

Washroom Sealing in Basted

Sealing in commercial washrooms, showers, kitchens and wet areas in Basted and across Kent. CHAS accredited and fully insured, with a 12-month guarantee.

  • Black mould inside silicone joints that cleaning can’t shift
  • Users noticing mouldy joints
  • Shower tray joints that have opened up
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
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
CHAS & Constructionline
£5m PL insurance

Need washroom sealing in Basted?

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

How a job runs

We follow your site rules from the start: signing in, inductions and any permit to work. With the paperwork done, the joints are worked through in the order agreed with your site contact, and each area is checked before we leave it. Smaller jobs around Basted can be grouped with others nearby. A fixed quote is given before anything starts.

  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. Old sealant is removed completely and the faces cleaned.
  4. Each joint is cleaned and left dry.
  5. A sanitary silicone bead is laid and given a smooth tooled finish.
  6. Each area is handed back when ready.

Before we start on site

  • Point out any areas we must not close
  • Share the asbestos register for older buildings
  • Let building users know which areas are affected

Get a fixed quote

Send us photos, drawings or a joint schedule are often enough for a fixed quote. Where a site visit makes more sense, we will arrange one.

Get a quick quote

Related advice

About our washroom sealing in Basted

Black spotting along a sealant bead is not a cleaning problem. The growth is inside the sealant so it returns whatever the cleaning regime. Only replacement gets rid of it for good. If you’re dealing with sealant laid over old silicone and now peeling and split or peeling sealant at shower trays, we can help, whatever the surface. A single leaking joint is often how a building in Basted first comes to us: we look at the rest while we’re there and tell you what we find.

Community buildings around smaller places like Basted have kitchens and toilets used by many people. Fresh anti-mould sanitary silicone at sinks, worktops and toilets keeps them cleanable.

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

The Mastic Doctor team standing beside their branded vans outside an office building
Place
Basted (TN15)
Region
Kent
Cover
A 12-month guarantee
Price
A fixed quote before we start
Phone
01277 525 020
Updated
3 November 2026

What sets the cost

We price every job individually. The main factors are:

  • Which sealant the job calls for
  • Whether old sealant has to be cut out first
  • The total length or number of joints
  • Any access equipment needed

The product called for affects the cost, as does the preparation each joint needs, from cutting out to priming and backing rod. Access, phasing and site rules also count.

What we need to price the job

There’s no need for a formal survey. These details are enough to start:

  • What the building is and how it’s used
  • Approximate linear metres or a joint schedule
  • Clear photographs of the problem areas
  • The site address and postcode

Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we will fill any gaps with a visit.

FAQs: Basted

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

Rarely all at once: work is phased so some facilities are always available. We’ll tell you the curing time for the product before we start.

Is Basted off your patch?

Not at all: smaller places are covered as well as towns. London and every South East county are within our area. Where we can, we group nearby jobs to make the most of each trip.

What sealant do you use in washrooms?

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

Can you quote from photographs?

It depends on the job. Simple work can often be priced from photos, while larger or less clear jobs get a site visit first.

How do you choose the sealant?

The specification comes first, if there is one. Without one, the joint decides: its movement, its surfaces and what it has to cope with.

Is it OK to put new silicone on top of the old?

We strip every bit of the failed bead and wipe away the residue first. That’s what makes the new joint last.

Are you CHAS accredited?

Yes. Mastic Doctor is CHAS accredited and a Constructionline member.

What we can’t put right

Being straight saves everyone time. New sealant won’t cure:

  • Loose panels, vanity units or tiles, which need fixing first
  • Leaking pipes, traps, wastes or cisterns, which need a plumber
  • Leaks through tanking or membranes below the finishes

If you’re not sure, just give us a call on 01277 525 020 or email drawings and photos and we will give you a straight answer.

Where we work in Basted

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

Sanitary sealant for Basted buildings

Central London is about 23 miles from Basted. Office washrooms on business parks see heavy weekday use, and resealing in phases keeps facilities available.

Office toilets at parks like Bourne Enterprise Centre, 1 mile north of Basted, take steady weekday use, and mouldy silicone soon shows. Pupil toilets at schools like Borough Green Primary School take heavy daily use, and the holidays give the window to reseal. Healthcare estates like Sevenoaks Hospital (to the west of Basted) expect contractors to follow their permits and cleaning rules in every washroom.

Basted is about 5 miles east of Sevenoaks, in Kent. Looking for washroom sealing in Basted? We can help, as we do across Kent. Basted is one of 931 places in Kent on our list for washrooms and wet areas. Sites around London have their own page, about 23 miles away.

Commercial sites across TN15 are covered. We cover commercial and managed buildings on Basted Mill and Plough Hill. Sites close to Basted are covered too, including Claygate Cross (1 mile south-east), Crouch (1 mile south-east), Borough Green (1 mile north), Platt (1 mile north-east) and Plaxtol (1 mile south). Further afield, our area takes in Maidstone (10 miles east), Dartford (12 miles north), Sevenoaks (5 miles west), Royal Tunbridge Wells (10 miles south), Gravesend (11 miles north) and Tonbridge (6 miles south).

Local landmarks in Basted

Recent enquiries here include premises near The Plough Public House, Wrotham School and Ivy Hatch Nature Reserve, among other places. The nearest railway station is Borough Green & Wrotham station, roughly 0.9 miles north. A little further out are Ightham Court (1.3 miles north-west) and Sevenoaks Hospital (4.8 miles west).

Map of Basted © OpenStreetMap contributors

Keeping the joints sound

Once the work is signed off, these steps help:

  • Clean sealant with gentle products and a soft cloth
  • Note failing joints building by building
  • Make sure washroom ventilation is running
  • Tell us about infection-control or permit rules before we quote

Keep extract fans working and vents clear. Constant damp lets mould take hold even on anti-mould grades so report fans that aren’t working to your building services team.

Leaks through tray and wet-floor joints can go unseen until a ceiling marks below. By then, other trades may be needed as well, so reseal when you first spot a split.

Why it’s worth doing now in Basted

Washrooms shape how visitors judge a building. Visitors notice black sealant even when the room is otherwise spotless. Resealing is a modest task with a very visible payoff. For buildings around smaller places like Basted, water damage can go unnoticed for longer, especially where a building isn’t used daily, so a failed joint can leak for a while before anyone sees it. Renewing joints in good time avoids the problem.

The work involved drives the cost: stripping out, preparation, sealing, access and phasing. Call for a quote and we’ll explain how it’s made up.

Why appoint us

  • Fixed quotes based on photographs, drawings or a visit
  • Products installed to the manufacturer’s instructions
  • Sealing commercial buildings since 2005
  • Health and safety: CHAS accredited

See our cost guide and how we’re accredited.

How the job changes by surface

Changing rooms and gyms

Gym and leisure changing rooms see showers running most of the day so sealant there works very hard. Anti-mould sanitary silicone is the standard choice.

Urinals and WC pans

Floor joints around WC pans are often forgotten. We include them in the survey.

Accreditations

Trusted. Accredited. Insured.