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

Washroom Sealing in Holbrook

We carry out sealing in commercial washrooms, showers, kitchens and wet areas in Holbrook and the surrounding area. Send details for a fixed quote.

  • Users noticing mouldy joints
  • Shower tray joints that have opened up
  • Failed sealant behind washroom basins
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Signed off, with 12 months’ guarantee.
London, the South East & Scotland
Constructionline member
£5m public liability

Washroom sealing across Holbrook

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

Different surfaces, different methods

Basins and vanity tops

Vanity tops and basins are splashed all day, so the wall joint and bowl surrounds tend to fail before anything else. They are resealed with anti-mould sanitary silicone.

Wet-room floors and floor-to-wall joints

Floor edges in wet areas are where water most often escapes. Floor perimeters and sealant joints near drains are resealed.

Washroom sealing in Holbrook

When mould has spotted a silicone joint, more cleaning won’t remove it. The mould has rooted into the silicone itself, which is why it comes back however often it is treated. Only replacement gets rid of it for good. We work on vanity units and basins, IPS panels and cubicles and urinals and WCs, and the usual reasons a site gets in touch are failed joints along IPS and cubicle panels and a new bead over an old one coming away. A single leaking joint is often how a building in Holbrook first comes to us: we look at the rest while we’re there and tell you what we find.

Smaller places such as Holbrook still have commercial washrooms and kitchens: in halls, pubs, schools, care homes and farm-based businesses. Sealant that has gone black with mould typically can’t be cleaned, so it is cut out and replaced.

Whoever the client is, the cover is the same: 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.

Mastic Doctor team members lined up next to their branded vans outside an office building
Where
Holbrook (RH12)
Wider area
West Sussex
Guarantee
12 months on our workmanship
Quotes
A fixed quote before we start
Telephone
01277 525 020
Page updated
3 November 2026

From enquiry to sign-off

Working in a building that stays open takes some planning. We sign and contain the area we’re in, keep walkways clear and work section by section so the rest of the building stays in use. Rural sites near Holbrook may need directions, gate codes or a contact on site. Send that with the details and we’ll confirm the plan with the quote.

  1. We survey each room, count the joints and note anything behind them that needs another trade.
  2. A phasing plan keeps part of the building’s facilities in use at all times.
  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. Rooms reopen after the product’s cure time, and we move to the next.

Before we start on site

  • Share your working hours and any access restrictions
  • Send any specification or drawings in advance
  • Clear stock, furniture or equipment away from the joints

Getting a fixed quote

A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we’ll arrange a site visit if anything is unclear.

Ask for a quote

Related advice

When to bring in a specialist

For a quick touch-up, site staff may be fine, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.

Redoing a failed joint normally costs more than getting it right at the outset, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.

What we can’t put right

Sealant solves a lot, but not everything, and we’re upfront when that’s the case. It won’t fix:

  • Failed tanking beneath a wet-room floor or behind tiles
  • Condensation from failed extract fans
  • Panel boards already damaged by water

If in doubt, call the office on 01277 525 020 or use the quote form and we’ll say what we think.

Where we work in Holbrook

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

Sanitary sealant for Holbrook buildings

Central London is about 30 miles from Holbrook. Office toilets in the commuter belt are in use from first arrivals to last departures, so we phase work to keep some facilities open. There are five care or nursing homes within about 2 miles of Holbrook. In care settings, wet rooms, assisted bathrooms and en suites rely on clean, sound sealant. Each room is kept out of use only as long as the sealant needs.

At a hospital like Horsham Hospital, 1.7 miles to the south-west of Holbrook, patient and staff washrooms are best done in short phases agreed with the ward. At a college such as The College of Richard Collyer, which lies south of Holbrook, washroom and kitchen sealant is best renewed in the holidays or in phases during term.

Holbrook is about 2 miles north of Horsham, in West Sussex. Businesses, contractors and managing agents in Holbrook can call on us for washrooms and wet areas. Holbrook is one of 373 places in West Sussex on our list for washrooms and wet areas. There’s a separate page for Brighton, about 20 miles away.

We cover the RH12 postcode districts. Nearby places we also cover include Warnham (2 miles west), Horsham (2 miles south), Broadbridge Heath (3 miles south-west), Tower Hill (3 miles south-west) and Rowhook (4 miles west). Further afield, our area takes in Crawley (5 miles east), Haywards Heath (11 miles south-east), Burgess Hill (12 miles south-east), East Grinstead (13 miles east), Broadfield (4 miles east) and Storrington (13 miles south-west).

Around Holbrook

Recent enquiries here include premises near Greenway Academy and Warnham Park, among other places. The nearest railway station is Warnham station, about 0.8 miles west of the centre. Nearby you will also find Horsham Hospital (1.7 miles south-west). For a walk, there’s Warnham LNR and Vann Lake.

Map of Holbrook © OpenStreetMap contributors

Common questions from Holbrook clients

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

Yes, healthcare and care buildings are part of our work. The estates team’s permit system and infection-control rules come first, and the work is planned around them.

Will you work in a care home in Holbrook without moving residents out?

Yes, with the manager deciding the order and timing of rooms. Tell us about any infection-control or safeguarding requirements and we’ll work to them.

What if there’s asbestos in the old mastic?

Some older mastics, especially in pre-2000 buildings, can contain asbestos. We check the asbestos register before cutting out old sealant in an older building, and work stops until any suspect material has been tested. We don’t remove asbestos-containing materials.

How do we ask for a quote?

The quote form is the simplest route, though you can also give us a call on 01277 525 020 or use the quote form. Include photos or drawings if you have them.

What sealant do you use in washrooms?

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

How many days will you need on site?

The duration is planned around your programme and the access we’re given. You’ll have an expected duration with the quote.

Do you guarantee washroom sealing?

Our workmanship has a 12-month guarantee backed by public liability insurance.

Do you need washroom sealing in Holbrook?

Decorators’ caulk and general sealants sometimes end up where sanitary silicone belongs. They don’t stand up to constant water and they discolour and fail early.

These are often picked up first by site or facilities staff:

  • Users noticing mouldy joints
  • Gaps where vanity tops meet the wall
  • Discoloured joints around urinals and WC pans
  • Kitchen worktop joints that can’t be kept clean

Customer toilets in retail centres such as Tanbridge Retail Park (to the south-west of Holbrook) rarely close, so resealing is phased.

What to look for in a quote

  • How joint depth will be controlled
  • Which product they’ll use, and why it suits the joint
  • Do they follow the manufacturer’s priming guidance?
  • Will RAMS and insurance details be available?

How to choose a sealant contractor

Building owners, agents and FMs in Holbrook

Main contractors use us as their sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.

Hospitality, education, healthcare, office and retail clients book us directly too. We plan around the way the building is used, so the building keeps working while we do.

Accreditations

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