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

Dean washroom sealing

We carry out sealing in commercial washrooms, showers, kitchens and wet areas in Dean and the surrounding area. Send photographs or drawings for a fixed quote.

  • Users noticing mouldy joints
  • Stained or open joints at kitchen sinks and worktops
  • Black mould inside silicone joints that cleaning can’t shift
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
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
London, the South East & Scotland
CHAS accredited
£5m public liability

Washroom sealing across Dean

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Our process

Tell us your site hours and access windows and we’ll plan around them. While we’re working, the area stays contained and tidy, and your contact hears from us before we move to the next area. Rural sites near Dean may need directions, gate codes or a contact on site. Send that with the details and we will confirm the plan with the quote.

  1. Every room is surveyed and the failed joints listed.
  2. You get a fixed quote with the phasing plan.
  3. The whole of the old bead is removed.
  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.

Getting the site ready

  • Tell us which areas need to stay in use
  • Have the specification and drawings to hand
  • Share your working hours and any access restrictions

Quotes

Quotes are fixed against the scope you send, so you know the figure before anyone is on site. To ask for one, call the office on 01277 525 020 or send details through our quote form.

Get a price

Read more

How we handle washroom sealing in Dean

Since 2005 we have resealed commercial washrooms for facilities teams, contractors and building owners. Our applicators are CSCS-carded, and we are CHAS accredited and a Constructionline member. There is public liability insurance behind every job. Every resealed washroom carries our 12-month guarantee. The enquiries we see most involve black mould inside silicone joints that cleaning can’t shift and urinal joints that look unhygienic, on vanity units and basins, IPS panels and cubicles and accessible toilets and changing rooms. Searching for sealant specialists in Dean? Mastic Doctor has worked for contractors, FMs and building owners since 2005.

Farm shops, cafés and venues in converted rural buildings around places like Dean have busy toilets and kitchens. Tell us your opening times and quiet periods and we’ll plan around them.

Work we carry out comes with a 12-month guarantee. Should something we installed fail, phone 01277 525 020 or email drawings and photos and we will come back to it.

The Mastic Doctor team beside their liveried vans in front of an office building
Place
Dean (SO32)
Wider area
Hampshire
Guarantee
12 months on every job
Price
A fixed quote before we start
Telephone
01277 525 020
Updated
3 November 2026

Common problems we fix in Dean

We often find acrylic caulk or general-purpose sealant in joints that should have sanitary silicone. They don’t stand up to constant water, and they stain, crack or wash out.

If one of these sounds familiar, it’s time for a closer look:

  • Split or peeling sealant at shower trays
  • Stained or open joints at kitchen sinks and worktops
  • Gaps where vanity tops meet the wall
  • Black mould inside silicone joints that cleaning can’t shift

Office washrooms on sites such as Swanmore Business Park (to the south of Dean) are in use all working day, so resealing is phased to keep some open.

Comparing quotes

  • Which product they’ll use, and why it suits the joint
  • How they’ll work around occupants
  • Their approach to joint depth and backing
  • Their pre-qualification and accreditations

Choosing a commercial sealant contractor

FAQs: Dean

Do we have to close all our washrooms in Dean for resealing?

Not all at once. We take one block of facilities at a time. Each area is handed back once the sealant has cured enough to use.

Is Dean too far out for you?

No. Places such as Dean are covered as much as the big towns. London and every South East county are within our area. Good photos up front let us bring everything on the first visit.

Is colour matching possible?

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

Which silicone is right for commercial washrooms?

It depends on the joint. Washrooms and showers take anti-mould sanitary silicone, and food areas take a hygienic, food-safe sealant where food contact is possible.

How do you deal with asbestos in old sealant?

Asbestos is possible in some older mastics, particularly in buildings from before 2000. Before we disturb old sealant in an older building, we ask to see the asbestos register or survey, and if asbestos is suspected, work stops until it’s tested. Removing asbestos is a job for asbestos specialists, not us.

Are you CHAS accredited and on Constructionline?

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

Do you work in hospitals, clinics and care homes?

We work in clinics, hospitals and care homes. Any records you need are confirmed with the quote.

Site staff or a sealant specialist?

Paperwork matters too. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and our CSCS-carded applicators are used to working under those rules.

Redoing a failed joint typically costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.

Building owners, agents and FMs in Dean

Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Sites in Dean can sit alongside others in a wider programme across Hampshire.

Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. We work to your programme, your specification and your site rules.

Quoting for work in Dean

What shapes the price:

  • Removal of failed or old sealant
  • Quantities, in metres or numbers
  • Travel to remote or island sites
  • How accessible the joints are

Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well.

Before you send an enquiry

A good diagnosis starts with the right details. Let us know:

  • Any dates the work must fit around
  • The type of building and who uses it
  • Where the site is, with the postcode
  • Specification clauses that apply

Photos, drawings or a schedule of the joints are often enough for a fixed quote. Where a site visit makes more sense, we’ll arrange one.

Honest limits

A few problems need another trade or a different fix, and we point that out rather than sealing over them:

  • A room that stays damp because ventilation isn’t working
  • Panel boards already damaged by water
  • Water escaping beneath the floor rather than through a joint

If in doubt, call the office on 01277 525 020 or email the details over and we’ll say what we think.

What we seal

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

Busy facilities in and around Dean

At about 60 miles from central London, Dean is within reach of the capital, in a commuter belt where offices and business parks are common. Washrooms in commuter-belt offices take constant weekday traffic, so we phase work to keep some facilities open.

At a school such as Bishops Waltham Infant School, changing rooms and kitchens need cleanable joints as much as the toilets. At a hotel such as The Crown Hotel, 1.4 miles to the south-west of Dean, the quieter weeks are the time to reseal bathrooms.

Dean is about 6 miles north-east of Hedge End, in Hampshire. Any commercial site in Dean is covered, whether it’s a single job or part of a planned programme. Dean is one of 723 places in Hampshire on our list. For work in that direction, see our Southampton page (9 miles or so).

Anyone looking for washroom sealing in SO32 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. We cover commercial and managed buildings on Dean Lane, Little Ashton Lane and Limekiln Lane. If your building is just outside Dean, we cover The Hangers (1 mile east), Upper Swanmore (2 miles south-east), Swanmore (2 miles south), Hill Grove (2 miles south-east) and Droxford (3 miles east). A short drive away, we cover Winchester (8 miles north-west), Gosport (12 miles south), Havant (12 miles south-east), Eastleigh (6 miles west), Fareham (8 miles south) and Horndean (9 miles south-east).

Local landmarks in Dean

Locally, jobs take us to sites close to Swanmore College of Technology, among other places. For rail, the closest station is Botley station, about 4.6 miles south-west of the centre. Well-known places in the area include Bishop's Waltham Museum (1.4 miles south-west). For a walk, there’s Bishops Waltham Branch LNR and Beacon Hill.

Map of Dean © OpenStreetMap contributors
Accreditations

Trusted. Accredited. Insured.