Highland · Scotland
Castletown Fire Rated Sealant
Our applicators work in Castletown on intumescent and fire-rated sealant around gaps, frames and service penetrations. Old material cut out, joints cleaned and sealed neatly.
- Open gaps behind door architraves
- Gaps flagged on a fire risk assessment
- Fire stopping disturbed by later work
The process
The work is kept neat and contained to the area we’re working on. Expect the work to take a few hours for a handful of gaps, and longer for a whole building. Outdoor work around Castletown depends on the weather, as sealant needs a dry surface, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- We start with the survey or action list, checking the size and surfaces of every gap.
- We remove any old or unsuitable filler and clean the gap.
- We put in whatever backing or fill the product detail specifies.
- We apply the fire-rated or intumescent sealant to the specified depth and tool it.
- Finally, we list where we worked and what we used, for your records.
How to prepare
- Mention any parking rules near the property
- Clear items away from the joints we’re working on
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that is easy.
Related advice
Fire rated sealant for homes and businesses in Castletown
Door frame gaps, linear joints and holes around services all have their own details. We check the size and the substrate before choosing the product, then the sealant goes in to the depth the product’s details set. We work on flats & HMOs, door frames and service penetrations, and the jobs we see most are gaps filled with a product that isn’t fire-rated and gaps flagged on a fire risk assessment.
For holiday lets, guest houses and community buildings in or near Castletown, the washrooms and kitchens need the same care as any city building, and fire-rated joints should be kept in good order.
Big or small, you get the same one-year guarantee.
- Location
- Castletown (KW14)
- Region
- Highland
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Landlord and commercial work in Castletown
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
What happens if it’s left?
Sealant is not the fix for every opening. Big openings, bundles of cables and plastic pipes may need batts, collars or wraps instead. If a gap is not suitable for sealant, we’ll tell you. In an older home around Castletown, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please email us at info@mrmastic.co.uk.
Why us?
- Arbo and Everbuild products
- 180+ five-star Google reviews
- Anti-fungal sanitary silicone in wet areas
- Experience in homes, commercial sites and hotels
Take a look at how sealant jobs are priced or customer reviews.
Other services in Castletown
When to call us in Castletown
Movement in the structure can open gaps too: cracked or debonded sealant leaves an open route through the wall. Damage from cleaning, knocks and maintenance adds to it.
If you can see any of these, it’s time to have the joints looked at:
- Seals cut through by electricians, plumbers or data installers
- Holes left by a change of layout
- Standard silicone or caulk in a fire-stopping gap
- Joints picked up in a fire-stopping survey
Around Castletown, as everywhere, fire rated sealant is only as good as the preparation behind it.
Before you book anyone
- How the surfaces are prepared before sealing
- How hidden problems are handled
- Are they insured?
- What guarantee comes with the work
Different surfaces, different methods
Linear gaps
Long, narrow gaps appear where walls meet slabs and ceilings. We seal them to the tested detail, with backing where it’s needed.
Plasterboard walls
Service holes in plasterboard are often rough and oversized. Gaps that are too big for sealant alone need a different detail.
Castletown: your questions answered
Do you cover Castletown for fire rated sealant?
Yes. We work across all of Scotland, and Castletown is part of that. You can email us at info@mrmastic.co.uk and tell us what needs doing, and we’ll give you a clear price.
Is Castletown within the area you cover?
Yes. Castletown is within the area we cover, which takes in towns, villages and rural addresses. We work across all of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Is it worth trying it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
What’s the difference between intumescent and fire-rated sealant?
Intumescent describes a material that swells in heat. Intumescent sealants are a type of fire-rated sealant, and the choice depends on the gap.
Do you hold any approvals?
Yes. We’re approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Can you give us a record of the work?
Yes. Every gap we seal is listed with the product used so it’s there for the next inspection.
Where are you based?
Our base is in Crawley, and we work across South East England, London and Scotland.
I rent my home. Can I book you?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.
Aftercare tips
Good habits help new joints last longer. A few tips:
- Take pictures of fire stopping before ceilings or boxing go back
- Store the list of sealed gaps with your building paperwork
- Allow for resealing whenever new services are run
- Look in service cupboards and ceiling voids from time to time
Do not add foam, filler or ordinary sealant over a fire seal. Repairs should use a matching fire-rated product. We can tell you which product we used.
Any job that breaks through a wall or ceiling should include resealing. Doing it at the time avoids leaving gaps behind.
What fire rated sealant looks like in Castletown
If you run a hotel, guest house or holiday let in a coastal place like Castletown, busy months put washrooms and kitchens under pressure, so it’s worth checking the sealant before the busiest weeks. In Scotland, building work comes under the Building (Scotland) Regulations and their technical handbooks. Fire-rated sealant is installed to the manufacturer’s tested details, though we don’t certify buildings or do fire risk assessments.
For buildings such as St Trothan's Church, older buildings that have had new heating or wiring often have service gaps worth checking.
Castletown is about 5 miles east of Thurso, in Highland. From the centre of Castletown to the outskirts, we cover fire rated sealant for every kind of property. Across Highland, we cover 253 places, Castletown among them.
All of KW14 is covered for fire rated sealant. Fire rated sealant is available to properties on Calder Square, Main Street and Traill Street and the roads around them. Nearby, we also carry out fire rated sealant in Murkle (2 miles west), Dunnet (3 miles north-east), Brough (4 miles north), Bower (4 miles south-east) and Thurso (5 miles west). Island and remote addresses take a little more planning, so tell us where you are when you ask for a quote.
What’s near Castletown
A little further out are Thurso Castle (4.4 miles west) and Dunbar Hospital (5.5 miles west). Not far away are St John's Loch.
When it isn’t the sealant
We’ll always be straight with you, so here’s what new sealant will not do:
- Large holes that need a different fire-stopping system
- Sign-off of the building, which sits with building control or your assessor
- Walls or floors that weren’t built to resist fire
If in doubt, email us at info@mrmastic.co.uk and we’ll say what we think before booking.
Surfaces we seal
- Plasterboard & masonry
- Pipe & cable gaps
- Linear gaps
- Flats & HMOs
- Door frames
- Service penetrations