East Lothian · Scotland
Dunbar External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Dunbar, backed by a one-year guarantee. Ask us for a quote.
- Joints with sealant missing in places
- Joints where the bead has come unstuck
- Moss and dirt in joints with no sealant left
External mastic for homes and businesses in Dunbar
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall so the joint does not stand out. Typical jobs include joints pointed up with cement by mistake and sealant that has lost its bond to the brick or render, on render & cladding joints, joints between brick and frames and brickwork movement joints.
External sealant needs dry surfaces, so outdoor work around Dunbar is planned around the weather, and longer journeys are planned in advance. Tell us how to reach each wall, gutter and roofline.
All our work is covered by our one-year guarantee.
- Location
- Dunbar (EH42)
- Region
- East Lothian
- Guarantee
- One year on every job
- Price
- A clear price before we start
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Outside joints around Dunbar
Dunbar is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
Letting a property close to Dunbar station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Dunbar is about 26 miles east of Kirkcaldy, in East Lothian. For external mastic in and around Dunbar, it’s easy to get a quote: please email us at info@mrmastic.co.uk. We are based in Crawley and cover East Lothian. Our East Lothian coverage runs to 48 places, and Dunbar is one of them. Our Edinburgh page covers work nearby, about 27 miles away.
Here we cover the EH42 postcode area for external mastic. If you need external mastic at a property on High Street, Bruntsfield Crescent and Leslie Way or a nearby road, our applicators can take on the job. You will find Dunbar on the A1087, so it’s easy for us to get to with everything needed for external mastic. Other places close to Dunbar include Belhaven (1 mile west), Broxburn (1 mile south-east), West Barns (1 mile west), Bielside (1 mile west) and Spott (2 miles south). Within a short drive, we also cover Haddington (11 miles west), North Berwick (9 miles north-west), Longniddry (15 miles west), Gullane (12 miles west), East Linton (5 miles west) and Aberlady (13 miles west). Dunbar is among the bigger towns we cover in East Lothian.
Near you in Dunbar
In Dunbar, that means homes and buildings near The Volunteer Arms. Dunbar has its own railway station: Dunbar station. Other landmarks nearby include Dunbar Town House Museum and Gallery (under half a mile north-east) and Belhaven Hospital (0.7 miles west). Open spaces near Dunbar include Doon Hill.
How the visit works
There is not much for you to do on the day. Point us to the joints and we’ll get on with it. The job generally takes a few hours for a handful of joints, longer for a whole elevation, including the tidy-up. Outdoor work around Dunbar 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.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention any tricky access
- For business premises, tell us about site rules or sign-in
Getting a quote
For a quote, drop us a line at info@mrmastic.co.uk with the location and a short description of the problem. You’ll have a clear quote before any work starts.
Advice
Quotes for external mastic in Dunbar
The quote reflects the job in front of us. We take into account:
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
- Any mould that needs treating
The cost depends on the amount of work, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts.
Helping us quote
There’s no need for technical detail. Just tell us:
- Roughly how big the job is
- What’s wrong with the joints now
- Whether it’s a home or a business
- Any previous sealing or DIY work
If you are in Dunbar and need external mastic, drop us a line at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and you will get a clear quote before we start.
Other services in Dunbar
When something else is needed
We’d rather tell you now than do work that won’t last, so these are the limits:
- Loose or hollow render, which needs re-rendering
- Cracked brickwork or render that needs a builder or plasterer
- Structural movement, which needs a surveyor or engineer
If in doubt, email us at info@mrmastic.co.uk and we will say what we think before you book.
What we seal
- Concrete & block
- Joints between brick and frames
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Façade panels
Signs you need external mastic in Dunbar
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, and it tears off the sides.
The problems people normally mention when they call include:
- Moss and dirt in joints with no sealant left
- Old sealant gone brittle and cracked
- Joints with sealant missing in places
- Movement joints filled with mortar instead of sealant
In the older streets around Abbey Church of Scotland, an extension built onto an older house moves differently, and the joint between them takes the strain.
What your quote should include
- How hidden problems are handled
- Whether the sealant suits the joint
- The length of the guarantee
- What the quote includes, VAT included or not
Dunbar questions
Do you cover smaller places like Dunbar?
Yes. Dunbar is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
Does the coastal weather in Dunbar affect outside sealant?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. Walls facing the sea are generally the first to need attention.
How do you reach high-level joints?
It depends on the building. Where joints can be reached safely, we will do them. Give us some details and we’ll confirm the access.
Where is Mr Mastic based?
We are based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
How long before the joint can be used?
Cure times vary by product. We tell you how long to leave it before we go.
What is backing rod for?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides so it can flex with the joint.
What’s an expansion joint in brickwork?
A vertical gap in a long brick wall is usually a movement joint. It gives the wall room to move and needs a flexible seal, not mortar.
Do you work for landlords and businesses?
Yes, often. Several properties can go on one quote, and between tenancies is a good time for the work.
Why act early in Dunbar
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost near the open joint, so the problem grows beyond the joint itself. In a place like Dunbar, small leaks are easy to put off, but water behind a failed seal does the most damage when nobody’s watching.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Why choose Mr Mastic in Dunbar
- Quality sealants from Arbo and Everbuild
- A 12-month guarantee on all work
- Anti-fungal silicone where joints get wet
- ARBOMaster approved applicator
Take a look at how sealant jobs are priced and what customers say.
Aftercare tips
Aftercare is simple:
- Ask before painting over external sealant
- Deal with leaking gutters that soak the joints below
- Point out the joints to other trades
- Get split or bare joints resealed while the damage is small
Only paint over the joint if we’ve confirmed the sealant can take paint. Many exterior sealants aren’t designed to be painted.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years, so it’s worth resealing at the first signs.
How the job changes by surface
Render joints
Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.
Concrete and blockwork
The face of concrete or block is often dusty, so preparation is key. A primer goes on where the product requires one before the bead.