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

Commercial washroom and wet-area sealing in Offham, Kent

Sealing in commercial washrooms, showers, kitchens and wet areas throughout Offham and nearby, carried out by CSCS-carded applicators. CHAS accredited and fully insured.

  • Washrooms that look worn because of the sealant
  • Stained or open joints at kitchen sinks and worktops
  • Mould spotting along silicone joints
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Signed off, with 12 months’ guarantee.
South East, London & Scotland
CHAS accredited
£5m PL insurance

Washroom sealing for businesses in Offham

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

Common questions from Offham clients

Do hotels near Offham have to close for sealant work?

Rarely, if ever. We take a few rooms out at a time. Tell us your quiet periods and access windows and we’ll plan around them.

Can you work on a hospital site such as Maidstone Hospital?

Yes, healthcare and care buildings are part of our work. We follow the site’s permits, sign-in and infection-control procedures in every area.

How do we ask for a quote?

You can use the quote form on this site; alternatively, give us a call on 01277 525 020 or email us. Include photos or drawings if you have them.

Can one quote cover more than one building?

Yes. A group of buildings can go on one quote, and you deal with one contact throughout.

Can you reseal washrooms in healthcare buildings?

Yes. We work to your estates and infection-control requirements and any site permits, and phase the work so areas keep facilities.

Do you offer coloured sealant?

That depends on the product specified. Some ranges offer many colours, others very few, so we will confirm the colours available for the specified product with the quote.

Can weather delay the job?

Outside, yes. Sealant needs a dry joint and a temperature within the product’s range, so damp, frosty or very cold days can stop external work. Internal work is rarely affected.

Washroom sealing in Offham

Not every silicone belongs in a washroom. Sanitary silicone contains additives that resist mould, and neutral-cure types are used where acetoxy silicone could attack some metals, stone or mirror backings. In food areas, hygienic or food-safe sealants are used where food contact is possible. Most enquiries involve black mould inside silicone joints that cleaning can’t shift and shower tray joints that have opened up, on urinals and WCs, showers, trays and wet room floors and IPS panels and cubicles. For commercial sealant work in Offham, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.

Halls and community buildings near places like Offham are used by different groups through the week, and their toilets and kitchens show it. Fresh anti-mould sanitary silicone at sinks, worktops and toilets keeps them cleanable.

A 12-month guarantee applies to all our work. Should something we installed fail, give us a call on 01277 525 020 or email drawings and photos and we will come back to it.

Location
Offham (ME19)
Wider area
Kent
Guarantee
A 12-month guarantee
Price
A fixed quote before we start
Phone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

For managing agents and facilities managers

We work for building owners and managing agents on sealant work across single buildings or whole portfolios. Several sites can go on one quote, so there’s one set of paperwork to deal with.

For main contractors, we work as the sealant subcontractor, on new build and refurbishment alike. We work to your programme, your specification and your site rules, with CSCS-carded applicators on site.

How a job runs

We schedule the visit to fit the site hours and access windows you give us. On the day, the work area is kept contained and tidy, and your contact hears from us before we move to the next area. For work around Offham, we aim to finish in one visit, so we ask for photographs and rough sizes first. That way the right products come on the day.

  1. Every washroom is checked joint by joint, with loose panels, leaks or damp noted for the right trade.
  2. The phasing is agreed so there are always facilities open.
  3. Failed silicone is removed completely and the surfaces cleaned of every trace.
  4. Joints are cleaned, degreased and dried before sealing.
  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.

What we need from you

  • Point out parking and an unloading spot
  • Point out any areas we must not close
  • Move anything stored against the joints

Getting a fixed quote

The quickest route to a quote is a few photos and the site postcode. Send them through the quote form, or ring 01277 525 020 or email a schedule or drawings if you’d rather talk the job through.

Get a price

Related advice

Doing it in-house

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

What you see is the finished bead, but most of the work is hidden. Correct depth, the right primer and a sealant matched to the movement are where general trades tend to cut corners.

When to call us in Offham

A lot of failed washroom sealant was laid over an old bead or a dirty surface. Silicone won’t adhere to a silicone bead, so it soon lets go.

Site and facilities staff are often the first to spot these:

  • Discoloured joints around urinals and WC pans
  • Open joints along basins and vanity units
  • Complaints from staff, guests or users about tired washrooms
  • Black mould inside silicone joints that cleaning can’t shift

Staff changing rooms and patient toilets at places like Maidstone Hospital, 4.8 miles east of Offham, need cleanable, sound silicone.

Questions to ask before you book

  • Do they follow the manufacturer’s priming guidance?
  • Whether their applicators hold CSCS cards
  • Proof of insurance
  • Which product they’ll use, and why it suits the joint

Choosing a commercial sealant contractor

Leave it or put it right?

Water gets behind panels and under floors through a failed joint. That can lead to swollen boards, marked ceilings below and lingering smells, and fixing that takes far more work than resealing. One visit to deal with every failing joint makes more sense than several trips to a place like Offham, rather than one at a time. Photos of every joint help us quote for the whole job.

We don’t publish prices, since every building and every scope is different. For a fixed figure, call for a quote and we’ll price your job on its own details.

What you get with us

  • Fully insured
  • A range of standard colours, depending on the product
  • Fixed quotes based on photos, drawings or a visit
  • Our applicators hold CSCS cards

Read our cost guide or how we’re accredited.

Keeping Offham washrooms open while we work

Offham lies roughly 25 miles out from central London, in a commuter belt where offices and business parks are common. Office toilets in the commuter belt are in use from first arrivals to last departures, which is why the work is phased. The area within 2 miles of Offham holds a number of hotels. En suite bathrooms, staff changing rooms and kitchens all need their sanitary silicone renewed in time. Rooms are done in turn so most stay available.

Halls linked to places like Church of St Michael host groups all week, which is hard on kitchen and toilet sealant. For a hotel such as Bear Hotel (1.5 miles east of Offham), resealing en suites a few rooms at a time keeps the rest available.

Offham is about 7 miles west of Maidstone, in Kent. Across the ME19 postcode area, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. Offham is one of 931 places we cover in Kent. Sites around London have their own page, about 25 miles away.

We take on washrooms and wet areas across the ME19 postcode area, for business premises of every kind. We cover commercial and managed buildings on Church Road, Pepingstraw Close and Teston Road. Nearby places we also cover include Wrotham Heath (1 mile west), Comp (2 miles west), Kent Street (2 miles south), New Pound (2 miles south) and Herne Pound (2 miles south). Bigger towns within reach include Maidstone (7 miles east), Dartford (12 miles north-west), Sevenoaks (8 miles west), Royal Tunbridge Wells (12 miles south-west), Gravesend (10 miles north) and Tonbridge (8 miles south-west).

Around Offham

In Offham, that means premises near King's Arms Public House and Manor Park Country Park, among other places. For rail, the closest station is West Malling station, roughly 1.9 miles east. Well-known places in the area include Leybourne Castle (2.2 miles north-east) and Maidstone Hospital (4.8 miles east).

Map of Offham © OpenStreetMap contributors

How the job changes by surface

Wet-room floors and floor-to-wall joints

Sealant at a wet-room floor edge is not a substitute for the waterproofing underneath and point it out if water appears to rise from below.

Changing rooms and gyms

Gym and leisure changing rooms see showers running most of the day, so mould is a constant battle. We use anti-mould sanitary silicone throughout.

Accreditations

Trusted. Accredited. Insured.