Highland · Scotland
External Mastic in Dunvegan
Sealing brickwork movement joints, render, cladding and façade joints in Dunvegan, with a one-year guarantee on every job. Call for a quick quote.
- Joints with sealant missing in places
- Movement joints filled with mortar instead of sealant
- Sealant pulling away from one side of the joint
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
About our external mastic in Dunvegan
For buildings in Dunvegan, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. Common call-outs are for weeds or debris growing in open joints and gaps where render, brick and frames meet, across joints between brick and frames, brickwork movement joints and façade panels.
Stone walls need a stone-friendly sealant, as acetoxy products can attack some stone. On newer homes, the movement joints and roofline trims are what need watching.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Dunvegan (IV55)
- Wider area
- Highland
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
How it works
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself usually takes a few hours for a handful of joints, longer for a whole elevation, depending on how much there is to do. In smaller Scottish places, parking is generally less of an issue than access and distance. Tell us how to find the property and how to reach the work, and the visit is planned around that.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Keep children and pets away from the work area
- Mention any parking rules near the property
- Let us know about stairs, lifts or work at height
How to get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, email us at info@mrmastic.co.uk.
Related advice
Different surfaces, different methods
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. A primer goes on where the product requires one.
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind and protects the render itself.
What we are called out for in Dunvegan
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
It’s worth asking for a quote if you see:
- Weathered mastic that no longer stretches
- Moss and dirt in joints with no sealant left
- Brick movement joints where the sealant has split
- Panel joints letting water in
In and around Dunvegan, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
What to look for in a quote
- What the cure time is
- Who does the work, and how experienced they are
- Whether VAT is included
- What product goes in the joint
Honest limits
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Cracking across the wall rather than at a joint
- Rising or penetrating damp from elsewhere in the wall
- Failed render or damaged cladding panels
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly before you book.
Where we work in Dunvegan
- Copings & trims
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
Your questions about external mastic in Dunvegan
Will you come out to Dunvegan?
Yes, we do. We work across all of Scotland, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you do external mastic in Dunvegan?
Yes, Dunvegan is within the area we cover. We work across all of Scotland. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing, and we will give you a clear quote.
How long will you be here?
Typically it takes a few hours for a handful of joints, longer for a whole elevation. Bigger jobs take longer.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you do not need to watch us work.
When will the joints need doing again?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Our work comes with a one-year guarantee.
What does external mastic cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You will get a clear quote before any work starts.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.
How to look after the new joints
Looking after new joints is easy:
- Tell anyone working on the walls about the movement joints
- Check the sealant is paintable before painting near it
- Have failed joints looked at early
- Deal with leaking gutters that soak the joints below
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
What external mastic looks like in Dunvegan
Dunvegan is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Plenty of Scottish homes have harled walls, and joints where harling meets other materials need a sealant that can grip and flex.
For jobs in and around Dunvegan, choosing the right material for each joint is as important as a tidy finish.
Dunvegan (Gaelic: Dùn Bheagan) is in Highland. Whether you are in the middle of Dunvegan or further out, external mastic is available for homes and businesses alike. Across Highland, we cover 253 places, and Dunvegan is one of them.
We work across the IV55 postcode area for external mastic and the streets around it. External mastic is available to properties on Mill Road, Rathad Chille Mhoile and Kings Brae. We also cover the places around Dunvegan: Kilmuir (1 mile north), Lonmore (1 mile south-east), Colbost (3 miles west), An t-Aodann Ban (6 miles north-east) and Coillore (9 miles south-east). For island and remote addresses, the job takes a little more planning, so let us know when you get in touch.
Around Dunvegan
Other landmarks nearby include Giant Angus Macaskill Museum (under half a mile north-west) and Dunvegan Castle (1.2 miles north-west). Not far away are An Dubh Loch and Healabhal Mhòr.
Also near Dunvegan
What else we do in Dunvegan
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can go on one quote.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.