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

Washroom Sealing contractors in Harestock

Commercial sealant work in Harestock for contractors, FMs and building owners: sealing in commercial washrooms, showers, kitchens and wet areas, with a fixed quote first.

  • Open joints along basins and vanity units
  • Sealant laid over old silicone and now peeling
  • 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
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.
London, the South East & Scotland
Constructionline member
£5m public liability

Washroom sealing near Harestock

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

FAQs: Harestock

Will you plan work around the academic year at somewhere like University of Winchester?

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.

Can you work on a hospital site such as Sarum Road Hospital (BMI)?

Yes, hospitals are one of the sectors we cover. Each area is agreed with the ward or department and the estates team in advance.

What guarantee comes with washroom resealing?

A 12-month guarantee covers the work. It applies to our workmanship, not to plumbing leaks or damp from poor ventilation.

Can one quote cover more than one building?

Yes. A group of buildings can go on one quote, with one point of contact.

When is resealing likely to be due?

It depends on movement, UV and weather, cleaning, traffic and the product. Sealant joints are maintenance items, so inspect them regularly.

Is any job too small?

Whatever the size, the process is the same: send details, get a fixed quote, we seal, guaranteed.

How long before the toilets can reopen?

Cure times vary by product and temperature. You’ll get a reopening time for each area before we leave it.

About our washroom sealing in Harestock

In healthcare and care settings, sealing is part of keeping surfaces cleanable. Your estates and infection-control requirements, and any permits the site uses, shape how we work. Any records you need are confirmed with the quote. We work on vanity units and basins, accessible toilets and changing rooms and urinals and WCs, and the usual reasons a site gets in touch are discoloured joints around urinals and WC pans and shower tray joints that have opened up. Whoever orders the work in Harestock, the brief is typically the same: a clear scope, tidy work and joints that don’t fail again.

Around Harestock, washroom work normally comes one building at a time. Photos of each area help us plan the visit and bring the right sealant.

Every job we finish is backed by a 12-month workmanship guarantee. If a joint we sealed fails because of how it was installed, we come back and put it right.

The Mastic Doctor team beside their liveried vans in front of an office building
Location
Harestock (SO22)
Region
Hampshire
Cover
12 months on every job
Quotes
Fixed quote, scope in writing
Telephone
01277 525 020
Last updated
3 November 2026

Washroom sealing around Harestock: how the place shapes the job

At about 61 miles from central London, Harestock is within reach of the capital, within the office belt around the capital. Office washrooms on business parks see heavy weekday use, so we work a block of facilities at a time. The area within 2 miles of Harestock holds plenty of hotels. Each has en suites, back-of-house toilets and kitchens with sealant that moulds and splits. Rooms are done in turn so most stay available.

Healthcare washrooms on sites such as Sarum Road Hospital (BMI) (to the south of Harestock) are resealed area by area, under the site’s own infection-control rules. Toilets at colleges like Peter Symonds College (0.6 miles south of Harestock) take heavy use from students and staff alike.

Harestock is about 2 miles north-west of Winchester, in Hampshire. Looking for washroom sealing in Harestock? We can help, as we do across Hampshire. Across Hampshire, 723 places are covered, including Harestock. Sites around Southampton have their own page, about 12 miles away.

Work on washrooms and wet areas is covered throughout SO22. Streets here include Kennel Lane, Burley Road and Stoney Lane, and sites on any of them can send details for a fixed quote. Nearby places we also cover include Littleton (1 mile north-west), Weeke (1 mile south), Abbotts Barton (1 mile south-east), Hyde (1 mile south-east) and Headbourne Worthy (1 mile north-east). Further afield, our area takes in Eastleigh (8 miles south), Andover (11 miles north-west), Totton (14 miles south-west), Chandler's Ford (7 miles south), Hedge End (12 miles south) and Romsey (9 miles south-west).

What’s near Harestock

We work on buildings around Henry Beaufort School and The Running Horse pub. The nearest railway station is Winchester station, about 1.2 miles south-east of the centre. Other landmarks nearby include Royal Observer Corps Museum (1.1 miles south-east) and Royal Hampshire County Hospital (1.5 miles south). Open spaces near Harestock include Twyford Down and Winnall Moors.

Map of Harestock © OpenStreetMap contributors

Owners, agents and contractors

Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Sites in Harestock can sit alongside others in a wider programme.

Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. Programme, specification and site rules come first.

From enquiry to sign-off

We follow your site rules from the start: signing in, inductions and any permit to work. Once we’re cleared to begin, the joints are worked through in the order agreed with your site contact. What matters most for a job in Harestock is a clear list of what needs doing, so send photographs of each area. A fixed quote follows.

  1. We agree which washrooms close and when.
  2. Anything behind the joints that needs another trade is flagged.
  3. Failed sealant and residue are stripped out.
  4. The right sanitary or food-safe sealant is applied.
  5. We give you a reopening time for every room.

Getting the site ready

  • Let us know about inductions and permits
  • For older buildings, check the asbestos register before work
  • Tell staff and tenants when we will be in

Quotes

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to call 01277 525 020 or email drawings and photos with what you know.

Ask for a quote

Related advice

Leave it or put it right?

When a washroom looks worn, a refit isn’t the only answer. If the finishes are in good order, replacing the sealant may do much of what’s needed for now. Over time, UV, weather and movement wear any sealant out. Renewing it in good time keeps the building weathertight.

The product called for affects the cost, and so does the preparation, such as cutting out, priming or new backing rod. Access, phasing and site rules also count.

What you get with us

  • A Constructionline member, so easy to vet
  • Over 20 years of commercial sealing
  • Colours confirmed for the specified product
  • Fully insured

Take a look at how commercial sealant jobs are priced or our accreditations and insurance.

Do you need washroom sealing in Harestock?

Occasionally a joint keeps failing because of a problem behind it: a loose panel, a leaking waste or water coming through the wall. We look for it before resealing and say if it needs a plumber or another trade.

Any of the following is a good reason to get the joints checked over:

  • Failed joints along IPS and cubicle panels
  • Gaps where vanity tops meet the wall
  • Black mould inside silicone joints that cleaning can’t shift
  • Kitchen worktop joints that can’t be kept clean

Welfare facilities in units on estates such as Wykeham Industrial Estate (to the south-east of Harestock) have showers, toilets and kitchens with sealant that works hard.

Comparing quotes

  • Is the sealant right for the movement and the substrate?
  • How long is the guarantee, and what does it include?
  • Will CSCS-carded applicators be on site?
  • How they handle RAMS and site documents

How to choose a sealant contractor

Aftercare for building managers

Sealant joints are maintenance items, and their life depends on movement, exposure, cleaning and use. Our advice:

  • Make sure washroom ventilation is running
  • Avoid scourers and harsh descalers on silicone
  • Inspect washroom sealant regularly
  • Tell us about infection-control or permit rules before we quote

Ventilation is half the battle. A room that stays damp will grow mould on almost anything so report fans that aren’t working to your building services team.

A split joint at a shower tray can leak for a long time before anyone sees it. At that stage, boards or ceilings may need repair, so reseal when you first spot a split.

When it isn’t the sealant

Some faults sit outside our scope, and we say so rather than covering them up:

  • Water escaping beneath the floor rather than through a joint
  • Mould caused by poor ventilation, which will return until the extract is fixed
  • A dripping waste or valve behind a panel

Not sure which it is? You can phone 01277 525 020 or email drawings and photos and we’ll tell you honestly.

What we seal

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

Trusted. Accredited. Insured.