Dumfries and Galloway · Scotland
Fire-rated sealant in Thornhill, Dumfries and Galloway
We cover Thornhill for intumescent and fire-rated sealant around gaps, frames and service penetrations. Old material cut out, joints cleaned and sealed neatly.
- Fire stopping disturbed by later work
- Gaps around pipes and cables through fire-resisting walls
- Gaps filled with a product that is not fire-rated
How we handle fire rated sealant in Thornhill
Until it’s heated, intumescent sealant behaves like an ordinary sealant; then it swells to help close the gap. Which product suits a gap depends on its width, the materials either side and what runs through it, so we work to the manufacturer’s details. If you are dealing with cracked or shrunken fire-rated sealant and gaps filled with a product that isn’t fire-rated, we can put it right, on door frames, pipe & cable gaps and linear gaps alike.
In a smaller place like Thornhill, commercial jobs are more likely to be a hotel, guest house, school, surgery or community hall than an office block. All of them have washrooms, kitchens and fire-rated joints that need looking after.
Your job is guaranteed for a year, as with all our work.
- Location
- Thornhill (DG3)
- Wider area
- Dumfries and Galloway
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
The process
There’s no need to move everything out before we come, only the area right around the joints. Everything nearby is protected, and the job takes a few hours for a handful of gaps, and longer for a whole building for a typical job. For a place like Thornhill, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We start with the survey or action list, checking the size and surfaces of every gap.
- Old or unsuitable sealant is cut out and the gap cleaned.
- We put in whatever backing or fill the product detail specifies.
- Fire-rated or intumescent sealant is applied to the right depth and tooled.
- We record the locations and products used for your records.
Getting ready for the visit
- Clear items away from the joints we’re working on
- On commercial sites, let us know about site rules
- Keep children and pets away from the work area
How to get a quote
We do not publish a price list. Instead, your job gets its own clear quote. To get started, send an email to info@mrmastic.co.uk.
Related advice
Also near Thornhill
Also in Thornhill
Landlords, agents and businesses in Thornhill
If you manage several properties in or around Thornhill, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
What fire rated sealant looks like in Thornhill
There are hotels and other places to stay in and around Thornhill. Hotel work can be planned room by room, with out-of-hours working where needed. 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; we don’t certify buildings or carry out fire risk assessments.
Schools such as Wallace Hall Academy are buildings too, and service openings in fire-resisting walls need checking after any refurbishment.
Thornhill is about 13 miles north-west of Dumfries, in Dumfries and Galloway. Anywhere in DG3, we cover fire rated sealant for homes and businesses. Thornhill is one of 138 places in Dumfries and Galloway where we work for fire rated sealant. Glasgow is on our list too, around 47 miles away.
Our applicators cover all of the DG3 postcode area for fire rated sealant and the streets around it. If you need fire rated sealant at a property on Drumlanrig Street, West Morton Street and St Cuthbert's Walk or anywhere close by, we can help. If you’re just outside Thornhill, we cover Keir Mill (2 miles south-west), Carronbridge (2 miles north), Penpont (2 miles west), Closeburn (2 miles south-east) and Wallaceton (5 miles south). Further out, we also cover Dumfries (13 miles south-east), Moffat (14 miles north-east), Heathhall (13 miles south-east), Newbridge Drive (12 miles south-east), Lochmaben (15 miles south-east) and Troqueer (14 miles south-east).
Landmarks near Thornhill
Other landmarks nearby include Morton Castle (2.5 miles north) and Thornhill Hospital (under half a mile south). Green spaces nearby include Bellstane Loch.
Quotes for fire rated sealant in Thornhill
We don’t publish a price list, because no two jobs are the same. What we look at:
- The number and length of the joints
- How easy the joints are to reach
- Which sealant suits the joint
- How many rooms, windows or areas are involved
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Call for a quick quote and we’ll go through it with you.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it has been sealed before
- Pictures of the joints, sent by email
- How we’d reach the joints
For fire rated sealant in Thornhill, send an email to info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Keeping the joints in good condition
So the new joints stay in good condition:
- Tell trades working in the building that fire seals must be put back
- Keep pictures of seals that will be hidden
- Plan fire stopping into any work that goes through walls or floors
- Keep the record of products and locations with your fire safety documents
Follow the cure time we give you before decorating over the sealant. Some fire-rated sealants can be painted and some can’t.
Small gaps around services are simple to deal with while there are only a few. Leave them and each new job adds another hole.
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Common questions in Thornhill
Do you work in hotels near Thornhill?
Yes. Hotel and guest-house work is part of what we do. Work can be planned room by room, and out-of-hours working can be arranged.
Do you cover smaller places like Thornhill?
Yes. Thornhill 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 the work guaranteed?
Yes, always. Each job is guaranteed for twelve months, wherever you are.
What should I tell you?
A short description and the location, with pictures by email if possible. If we need more, we will ask.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
What does intumescent mean?
Fire-rated is the broad term for sealants tested for fire stopping. Intumescent types expand when heated, and they’re one option among several. The specification and the tested detail decide which is used.
Leave it or put it right?
Items left open on a fire risk assessment tend to come back at the next review. Getting them done and written up means you can show the action was taken. In an older home around Thornhill, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why book with us
- Quality sealants from Arbo and Everbuild
- More than 20 years in sealant work
- We are fully insured
- Sanitary silicone with an anti-fungal additive in wet areas
Read what affects the cost and our reviews.
Do you need fire rated sealant in Thornhill?
Buildings are refitted and reconfigured over the years. Conversions to flats and HMOs, and office refits, create new walls and new routes for services, with gaps to match.
These are the problems we are asked about most:
- Sealant items on a fire risk assessment action list
- Linear gaps at the head of walls
- Gaps left after a refit or conversion
- Old fire sealant that has split or come away
Around Thornhill, as everywhere, fire rated sealant is only as good as the preparation behind it.
Comparing quotes
- Whether you can choose the colour
- What happens if the job turns out different
- Whether the sealant suits the joint
- How long the guarantee is