South Lanarkshire · Scotland
External Mastic in Cleghorn
Sealing brickwork movement joints, render, cladding and façade joints for Cleghorn, backed by a one-year guarantee. Call for a quick quote.
- Failed seals between different materials
- Failed sealant between panels on a façade
- Weathered mastic that no longer stretches
External mastic for homes and businesses in Cleghorn
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it. If you have weathered mastic that no longer stretches and failed seals between different materials, we can help, whatever the surface.
Older stone buildings need a sealant that suits the stone, not an acetoxy product that can mark or attack it. On newer homes, the movement joints and roofline trims are what need watching.
Every job is covered by our one-year guarantee.
- Location
- Cleghorn (ML11)
- Region
- South Lanarkshire
- Cover
- One year on every job
- Quotes
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What affects the quote in Cleghorn
Call for a quick quote. The main things that affect it are:
- Whether old sealant or filler has to be cut out
- Working hours on commercial sites
- The amount of work
- Which sealant suits the joint
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, drop us a line at info@mrmastic.co.uk for an honest opinion and a quote.
What to tell us for a quote
When you call or email, these details help:
- Whether it has been sealed before
- What’s wrong with the joints now
- The address or postcode of the job
- The rough size of the job
There’s no standard price list. Instead, we send you a clear quote for your job. To get started, send an email to info@mrmastic.co.uk.
What we can’t put right
In fairness, there are a few things sealant will not fix:
- Movement that’s more than a sealant joint can take
- Cracked brickwork or render that needs a builder or plasterer
- Render that is blown, hollow or coming away
If you’re not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer before you book.
Surfaces we seal
- Façade panels
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Clear growth from the base of walls and joints
- Look over the joints every year, ideally after winter
- Avoid pressure-washing directly into sealant joints
- Keep water from gutters off the wall
Don’t paint over the new sealant unless we have said the product is paintable. Paint can crack on a flexible joint, and paint can crack as the joint moves.
Act while the splits are small. Then it’s a straightforward cut-out and reseal before water has had years to get in.
Cleghorn: your questions answered
Will you come out to Cleghorn?
Yes, smaller places are covered as well as towns. We work across all of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
I let a flat near Lanark station. Can you help?
Yes, rental work is part of what we do. Just send an email to info@mrmastic.co.uk and tell us about the property, and we will give you a clear quote.
How long before the joint can be used?
It depends on the product. Before we leave, we will tell you the cure time.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Where is Mr Mastic based?
We are based in Crawley, and we cover South East England, London and all of Scotland.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
How long does external mastic last?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly and reseal when it splits.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Landlords, agents and businesses in Cleghorn
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Walls and rooflines in Cleghorn
Harled (roughcast) walls are common in Scotland, and joints where harling meets other materials need a sealant that can grip and flex. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
For site and facilities teams at buildings such as Lanark Grammar School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Cleghorn is about 5 miles south-east of Carluke, in South Lanarkshire. Jobs in Cleghorn get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Cleghorn is one of 139 places in South Lanarkshire we cover. For nearby work, see our Glasgow page.
We cover every part of the ML11 postcode area for external mastic. Whether your property is on Hagholm Road, Roman Court and Jerviswood Drive or anywhere close by, we can help. If you are just outside Cleghorn, we cover Ravenstruther (1 mile east), Lanark (2 miles south-west), Carstairs (2 miles east), New Lanark (2 miles south-west) and Kilncadzow (3 miles north-west). Within a short drive, we also cover Hamilton (14 miles north-west), Larkhall (10 miles west), Carluke (5 miles north-west), Strathaven (13 miles west), Bothwell (15 miles north-west) and Burnbank (15 miles north-west).
Landmarks near Cleghorn
The nearest railway station is Lanark station, about 1.7 miles south-west. Well-known places in the area include William Smellie Memorial Hospital (2.2 miles west) and Carstairs Castle (2 miles east). Not far away are Black Hill and Lanark Loch.
What happens on the day
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a handful of joints, longer for a whole elevation and we leave things clean and tidy. Outside jobs in Cleghorn need a dry day, because sealant won’t bond to a wet joint, so an outdoor job can move if the forecast changes. Work indoors isn’t affected.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
- Clear items away from the joints we are working on
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Read more
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
Signs you need external mastic in Cleghorn
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint.
Look out for these signs:
- Gaps where render, brick and frames meet
- Joints with sealant missing in places
- Water getting into walls through failed joints
- Sealant that has lost its bond to the brick or render
If you let a flat or house near Lanark station, split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- How the surfaces are prepared before sealing
- Whether you can choose the colour
- Who turns up on the day
- What the quote includes, VAT included or not