The Mastic Doctor team standing beside their branded vans outside an office building
Na h-Eileanan Siar · Scotland

Washroom Sealing contractors in Crosbost

Looking for washroom sealing in Crosbost? It’s simple: send details, get a quote, we seal, guaranteed.

  • Failed joints along IPS and cubicle panels
  • Failed sealant in a tea point or staff kitchen
  • Discoloured joints around urinals and WC pans
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
CHAS & Constructionline
£5m public liability

Washroom sealing near Crosbost

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Washroom sealing in Crosbost, done properly

Washroom joints need the right sealant, not whatever is to hand. Sanitary silicone contains additives that resist mould, and neutral-cure versions avoid the damage acetoxy types can do to some metals, stone and mirror backings. In food areas, hygienic or food-safe sealants are used where food contact is possible. If you have panel joints letting water behind and users noticing mouldy joints, we can help, on kitchens and tea points, accessible toilets and changing rooms and showers, trays and wet room floors alike. For commercial sealant work in Crosbost, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.

In smaller Scottish places like Crosbost, commercial washrooms are typically in hotels, pubs, schools, care homes and community halls. Black sealant normally can’t be cleaned, so it is removed and replaced with anti-mould sanitary silicone.

What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.

Where
Crosbost (HS2)
Region
Na h-Eileanan Siar
Cover
12 months on every job
Quotes
Fixed quote, scope in writing
Call
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

What sets the cost

Your fixed quote is built from the real scope. It allows for:

  • Quantities, in metres or numbers
  • Location, for remote and island sites
  • Specialist products, such as fire-rated or hygienic sealants
  • Working within restricted access windows

Larger quantities, tricky access or phasing all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.

What we need to price the job

For an accurate fixed quote, we need to understand the site. Send us:

  • Any dates the work must fit around
  • The asbestos register, for older buildings
  • A wide shot and a close-up of the area
  • Specification clauses that apply

If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price the work to it. For smaller jobs, photos and a description will do.

Our process

We bring the products specified for the job, along with primers and backing rod. Any old material is cut back to clean, sound faces, the manufacturer’s primer is applied where it’s called for, and each bead is tooled to a neat concave finish. Travel to smaller Scottish places like Crosbost is planned so the job is finished in one visit where possible, so photographs, sizes and a full list matter. External joints need a dry spell as well.

  1. First, the phasing is agreed so facilities stay open.
  2. Leaks, loose panels or damp are pointed out first.
  3. Old sealant is stripped and the faces prepared.
  4. The right sanitary or food-safe sealant is applied.
  5. We give you a reopening time for every room.

Before we start on site

  • Share your working hours and any access restrictions
  • Point out parking and an unloading spot
  • Warn occupants and staff about the work

Getting a fixed quote

Need a figure for a tender or a budget? Send the scope and any drawings, and we will return a fixed quote you can plan around. If you have questions first, ring 01277 525 020 or send photos by email.

Get a quick quote

Read more

Do you need washroom sealing in Crosbost?

Occasionally a joint keeps failing because of a problem behind it: loose fixings, a dripping trap or damp in the wall. We check for that first and say if it needs a plumber or another trade.

What tends to prompt an enquiry:

  • Users noticing mouldy joints
  • Failed joints along IPS and cubicle panels
  • Sealant stained black around basins and showers
  • Stained or open joints at kitchen sinks and worktops

In any commercial washroom in or near Crosbost, mouldy sealant is cut out rather than cleaned, and anti-mould sanitary silicone goes on clean, dry joints.

What to look for in a quote

  • Is the sealant right for the movement and the substrate?
  • What site paperwork they can supply
  • What the guarantee covers, and for how long
  • Health and safety accreditation such as CHAS

How to choose a sealant contractor

How the job changes by surface

Kitchens and tea points

Staff kitchens and tea points have joints at worktops, sinks and splashbacks. Sound joints keep those surfaces easy to clean.

Basins and vanity tops

Water getting past a vanity top joint can swell the board beneath. Prompt resealing keeps the unit sound.

Questions we’re asked in Crosbost

Do you take on work at healthcare sites like Western Isles 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.

Will the toilets in our Crosbost 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.

Can you quote from photos?

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

Can you follow the specification on our project?

Yes. We follow the specification, along with the manufacturer’s installation guidance, and any queries are raised before we start.

Are you CHAS accredited?

Yes. We are CHAS accredited, we are a Constructionline member and we use CSCS-carded applicators.

How many days will you need on site?

That varies with the scale of the job, though a typical visit typically takes half a day to a day per washroom, depending on the number of fittings. Larger or phased jobs take longer, and we’ll give you a timescale with the quote.

Can you clean the mould off instead of resealing?

Not for long. The mould is inside the silicone so cleaning only lightens it for a while. Replacement is the lasting fix.

Looking after the joints

Regular inspection catches problems early. In particular:

  • Don’t leave an open joint at a basin or tray
  • Squeegee showers and trays after busy periods
  • Add sealant joints to planned maintenance checks
  • Clean sealant with gentle products and a soft cloth

Each room goes back into use only when the sealant has cured enough. We’ll tell you when the wet areas can be used and signage stays in place until that time.

Inspectors look at whether kitchen surfaces can be kept clean. Failed sealant around sinks and worktops is easy to put right in good time.

What happens if it’s left?

Bleaching black sealant may lighten it for a few days but the growth is inside the bead and returns. A full reseal deals with it and your cleaning team stops chasing it. Buildings that aren’t in daily use, such as halls and seasonal premises, may let water in unnoticed, so a failed joint has time to cause damage. Early resealing prevents it.

Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.

What you get with us

  • Old sealant cut out, never sealed over
  • Our applicators hold CSCS cards
  • Fully insured
  • Over 20 years of commercial sealing

Take a look at what affects the cost or our accreditations.

Wet areas in Crosbost’s workplaces

With the shore within about 1 mile, Crosbost counts as a coastal location, and coastal hotels, guest houses and holiday sites tend to fill up in the busy months. Washrooms used guest after guest wear their sanitary silicone faster, so we plan the work for quieter weeks where possible. The west of Scotland, where Crosbost is, gets more rain than the east. Damp air means a poorly ventilated washroom rarely dries out fully, which is when mould gets into the sealant.

At a hospital like Western Isles Hospital, 5.9 miles to the north of Crosbost, patient and staff washrooms are best done in short phases agreed with the ward.

Crosbost is in Na h-Eileanan Siar. Our applicators travel to Crosbost for work on washrooms and wet areas, handled exactly as we handle every other area. Crosbost is one of 87 places we cover in Na h-Eileanan Siar.

Business premises anywhere in HS2 are within our area. Sites close to Crosbost are covered too, including North Lochs (1 mile west), Liurbost (1 mile west), Lacasaidh (4 miles south-west), Sandwick (5 miles north-east) and Stornoway (5 miles north). Island and remote sites need extra planning, with travel, ferry crossings where needed and weather to allow for, so mention the location when you call 01277 525 020 or email the details over.

Around Crosbost

Other landmarks nearby include Western Isles Hospital (5.9 miles north). Open spaces near Crosbost include Loch na Craoibhe and Nisreaval.

Map of Crosbost © OpenStreetMap contributors
Accreditations

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