East Lothian · Scotland
Cockenzie and Port Seton External Mastic
External mastic across Cockenzie and Port Seton and nearby, with old sealant always removed completely and a 12-month guarantee.
- Sealant that has lost its bond to the brick or render
- Movement joints with cracked, split or missing sealant
- Gaps where render, brick and frames meet
About our external mastic in Cockenzie and Port Seton
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. The colour is chosen to suit the brick or render so the line blends in. If you have water getting into walls through failed joints and moss and dirt in joints with no sealant left, we can help, on copings & trims, façade panels and render & cladding joints alike.
External sealant needs dry surfaces, so outdoor work around Cockenzie and Port Seton is planned around the weather, and longer journeys are planned in advance. Tell us how to reach each wall, gutter and roofline.
Each job carries a 12-month guarantee, large or small.
- Location
- Cockenzie and Port Seton (EH32)
- Wider area
- East Lothian
- Cover
- A year, on every job
- Quote
- A clear price before we start
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Surface by surface
Copings and trims
Metal and stone copings both move with temperature, so the joints need a sealant that stays flexible.
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Check the sealant is paintable before painting near it
- Act on the first splits you see
- Keep movement joints as flexible joints, not mortar
- Show decorators and builders where the movement joints are
Only paint over the joint if we’ve confirmed the sealant can take paint. Many exterior sealants aren’t designed to be painted and spoil the finish.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
What external mastic looks like in Cockenzie and Port Seton
Cockenzie and Port Seton 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’s hard on movement joints and outside wall joints, especially on the side facing the sea. Plenty of Scottish homes have harled walls, and where harling meets frames, pipes and other materials, the joint needs a flexible sealant that grips a rough surface.
For an older house near a landmark such as Chalmers Memorial Church, the joints between older walls, newer extensions and the roofline need a sealant that can move. For landlords with property near Prestonpans station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Cockenzie and Port Seton is about 4 miles north-east of Musselburgh, in East Lothian. Every kind of property in Cockenzie and Port Seton is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Our East Lothian coverage runs to 48 places, and Cockenzie and Port Seton is one of them. There’s also a page for Edinburgh, roughly 10 miles from Cockenzie and Port Seton.
We work across the EH32 postcode area for external mastic. If you need external mastic at a property on High Street, Park View West and North Seton Park or anywhere close by, our applicators can take on the job. With the B1348 and B6371 close by, Cockenzie and Port Seton is simple for us to get to. We also cover the places around Cockenzie and Port Seton: Seton (1 mile south), Prestonpans (1 mile south-west), Tranent (2 miles south), Prestongrange (2 miles south-west) and Macmerry (3 miles south-east). Further out, we also cover Musselburgh (4 miles south-west), Haddington (7 miles east), North Berwick (11 miles north-east), Wallyford (3 miles south-west), Gullane (7 miles north-east) and East Linton (11 miles east). Cockenzie and Port Seton is one of the larger places we cover in East Lothian.
Near you in Cockenzie and Port Seton
Cockenzie and Port Seton’s nearest station is Prestonpans station, about 1.5 miles south-west. A little further out are Seton Castle (0.8 miles south-east) and Battle of Prestonpans Jacobite Museum (1.5 miles south-west).
What we cannot put right
To be straight with you, some problems need a different trade:
- Structural movement, which needs a surveyor or engineer
- Failed render or damaged cladding panels
- Damp that isn’t coming from the joint
If you’re not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer before booking.
Joints and surfaces we work on
- Render & cladding joints
- Copings & trims
- Façade panels
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
What we do, step by step
The work is kept neat and contained to the joints we are treating. Expect the work to take anything from a few hours to several days, depending on the building, and we explain the cure time before we leave. In smaller Scottish places, parking is normally 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 start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Mention any sign-in or site rules at work premises
- Mention any parking rules near the property
How to get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved and give you a clear quote.
Advice
How we quote for external mastic
Every job gets its own quote. These are the things that affect it:
- Whether the work is at height
- How many rooms, windows or areas are involved
- Working hours on commercial sites
- The number and length of the joints
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we will explain what it covers.
Asking for a quote
Before you ask for a quote, have a think about:
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
- Access, such as stairs, a lift or height
- Where the job is, and your postcode
We quote each job on its own, so start by telling us what you need. Just drop us a line at info@mrmastic.co.uk with the details.
Your questions about external mastic in Cockenzie and Port Seton
Does the coastal weather in Cockenzie and Port Seton 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. It’s worth checking the walls that face the sea first.
Can you help a landlord with a rental near Prestonpans station?
Yes. We work for letting agents and landlords as well as homeowners. You can drop us a line at info@mrmastic.co.uk with the details for a clear quote.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
Is there any odour?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
What is backing rod for?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only, which would stop it stretching.
What colours does the sealant come in?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin, matched as closely as the range allows.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you don’t need to watch us work.
Work for landlords, hotels and businesses
If you manage several properties in or around Cockenzie and Port Seton, several properties can go on one quote. Just tell us the addresses and what each one needs.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
Places near Cockenzie and Port Seton
What else we do in Cockenzie and Port Seton
What we are called out for in Cockenzie and Port Seton
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it cannot stretch and rips as the joint opens.
Common reasons people contact us are:
- Brick movement joints where the sealant has split
- Leaking joints around cladding and façade panels
- Rigid filler in a joint that should flex
- Plants rooting in failed movement joints
If you look after a building such as Preston Lodge High School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- Is VAT in the price?
- Are they insured?
- Who turns up on the day
- Whether the sealant suits the joint