North Ayrshire · Scotland
External Mastic in Shewalton
Professional external mastic in and around Shewalton, with old sealant always removed completely.
- Failed seals between different materials
- Leaking joints around cladding and façade panels
- Sealant pulling away from one side of the joint
Aftercare tips
To keep the joints looking good and working properly:
- Keep soil, plants and ivy away from the joints
- Keep high-pressure jets off the joints
- Keep movement joints as flexible joints, not mortar
- Keep water from gutters off the wall
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.
External mastic in Shewalton, done properly
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two where a rigid filler would soon crack. If you have failed seals between different materials and moss and dirt in joints with no sealant left, we can put it right, on brickwork movement joints, joints between brick and frames and copings & trims alike.
Stone walls need a stone-friendly sealant, as acetoxy products can attack some stone. Newer houses need their movement joints and roofline trims kept sound.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Place
- Shewalton (KA11)
- Wider area
- North Ayrshire
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Nearby places to Shewalton
Also in Shewalton
Outside joints around Shewalton
Shewalton is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
For site and facilities teams at buildings such as Greenwood Academy, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Letting a property close to Irvine station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Shewalton is about 2 miles south of Irvine, in North Ayrshire. We provide external mastic to homes and businesses in Shewalton and the surrounding area, as part of our work across North Ayrshire. Our North Ayrshire coverage runs to 53 places, Shewalton among them. Our Glasgow page covers work nearby (23 miles or so).
We cover every part of KA11 for external mastic and the streets around it. Whether your property is on Shewalton Road, Drummond Crescent and Dunlop Place or a nearby road, our applicators can take on the job. Other places close to Shewalton include Lands of Broomlands (1 mile north-east), Broomlands (1 mile north), Fullarton (1 mile north-west), Dreghorn (1 mile north-east) and Drybridge (1 mile east). Further out, we also cover Kilwinning (5 miles north-west), Saltcoats (6 miles north-west), Ardrossan (7 miles north-west), Stevenston (5 miles north-west), Kilbirnie (11 miles north) and West Kilbride (11 miles north-west).
What’s near Shewalton
Shewalton’s nearest station is Irvine station, about 1.6 miles north-west of the centre. Nearby you will also find The Vennel Gallery (1.4 miles north-west) and Seagate Castle (1.7 miles north-west). For a walk, there’s Caprington Loch.
What the job involves on each surface
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so neither cracks the other.
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. A primer goes on where the product requires one before the bead.
Shewalton: your questions answered
Does the coastal weather in Shewalton affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Is Shewalton within the area you cover?
Yes, Shewalton is covered. Our work covers the whole of Scotland, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before resealing.
When is the sealant fully cured?
Cure times vary by product. Before we leave, we’ll tell you the cure time.
Where do you work from?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
I’m a tenant. Can you help?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Can new sealant go over the old?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
The process
At the end, we look at the finished work together and tell you how long to leave it. The visit itself usually takes a few hours for a handful of joints, longer for a whole elevation, depending on the size of the job. Somewhere like Shewalton may be a longer drive, and the journey is planned ahead. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We look at every joint and agree a colour to suit the wall.
- 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.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Let us know about earlier repairs to the joints
- Mention any tricky access
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. Whenever you are ready, drop us a line at info@mrmastic.co.uk.
Related advice
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will give you a quote.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Signs you need external mastic in Shewalton
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it can’t stretch and tears as soon as the joint widens.
People generally contact us when they notice one of these:
- Water getting into walls through failed joints
- Hard, crazed mastic that has stopped moving
- Movement joints with cracked, split or missing sealant
- Sealant pulling away from one side of the joint
Historic houses such as Girgenti House, about 4.6 miles north, show how far back building around Shewalton goes.
What your quote should include
- Is VAT in the price?
- Are they insured?
- What happens if they find a problem under the old sealant
- Whether the sealant suits the joint
Why it’s worth doing now in Shewalton
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together and it means sorting access once. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water through a failed joint keeps working away until it’s fixed.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why book with us
- Any old sealant cut out fully, not covered over
- Anti-fungal sanitary silicone in wet areas
- Every job guaranteed for a year
- Trusted Arbo and Everbuild sealants
Take a look at our cost guide or what customers say.
What sealant work can’t fix
It helps to know what we cannot do too:
- Cracked brickwork or render that needs a builder or plasterer
- Damp that is not coming from the joint
- Loose or hollow render, which needs re-rendering
Not sure which it is? You can email us at info@mrmastic.co.uk and we’ll tell you honestly.
Surfaces we seal
- Copings & trims
- Brickwork movement joints
- Concrete & block
- Render & cladding joints
- Façade panels
- Joints between brick and frames