Moray · Scotland
Blackhills External Mastic
We cover Blackhills for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Brick movement joints where the sealant has split
- Weathered mastic that no longer stretches
- Failed sealant between panels on a façade
External mastic in Blackhills, done properly
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. We work on brickwork movement joints, joints between brick and frames and façade panels, and the jobs we see most are failed sealant between panels on a façade and damp patches traced to an open external joint.
Across smaller places in Scotland, stone and harled cottages, farm buildings and newer houses often stand exposed to wind and rain. Outside joints on exposed walls work hard.
You get a one-year guarantee, the same in Blackhills as everywhere else we work.
- Where
- Blackhills (IV30)
- Wider area
- Moray
- Cover
- One year on every job
- Quote
- A clear price before we start
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Never let anyone fill a movement joint with mortar
- Check the sealant is paintable before painting near it
- Keep soil, plants and ivy away from the joints
- Fix overflowing gutters above sealed joints
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
A joint that has stopped moving pushes the movement elsewhere, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
More services for Blackhills
External mastic in Blackhills: local notes
Harled (roughcast) walls are common in Scotland, and where harling meets frames, pipes and other materials, the joint needs a flexible sealant that grips a rough surface. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
If you let a flat or house near Elgin station, outside joints that have cracked can let damp into a rental, so check them between lets.
Blackhills is about 4 miles south-east of Elgin, in Moray. Whether you’re in the middle of Blackhills or further out, external mastic is available for homes and businesses alike. Blackhills is one of 58 towns and villages in Moray we cover for external mastic. Aberdeen is on our list too, about 52 miles from Blackhills.
Every address in IV30 is within our area for external mastic. Blackhills sits on or near the B9103, so getting to you is simple. Neighbouring places we cover for external mastic include Lhanbryde (1 mile north), Urquhart (2 miles north), Hallowood (2 miles west), Longmorn (3 miles west) and Fogwatt (3 miles south-west). Further out, we also cover Elgin (4 miles north-west), Buckie (10 miles north-east), Forres (15 miles west), Lossiemouth (8 miles north-west), Keith (11 miles south-east) and Ashgrove (4 miles north-west). Island and remote addresses take a little more planning, so please mention your location when you email us at info@mrmastic.co.uk.
Landmarks near Blackhills
For rail, the closest station is Elgin station, about 4.3 miles north-west of the centre. Nearby you will also find Dr Gray's Hospital (5 miles north-west) and Gordon Castle (4.3 miles east). Green spaces nearby include The Lake and Findlay's Seat.
FAQs for Blackhills
Do you cover Blackhills for external mastic?
Yes, Blackhills is within the area we cover. Our work covers the whole of Scotland. You can send an email to info@mrmastic.co.uk and tell us what needs doing.
Will you come out to Blackhills?
Yes. Blackhills is within the area we cover, which takes in towns, villages and rural addresses. We work across all of Scotland. Just mention lanes, gates or anything else about the route when you book.
What does external mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before any work starts.
What is backing rod for?
That is backing rod, a closed-cell foam. It stops the sealant going in too deep and bonding to three sides so it can flex with the joint.
Is there a guarantee?
Yes, for a year. If anything is not right with the work within the year, let us know and we will sort it.
Do you remove the old sealant?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Can you match the colour of my brickwork?
We aim for a joint that suits the wall rather than one that jumps out. We will talk through colour options before any work starts from the range available.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we’re fully insured.
Different surfaces, different methods
Copings and trims
Copings expand and contract through the day, so the joints need a sealant that stays flexible year round.
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
Landlord and commercial work in Blackhills
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
When to call us in Blackhills
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.
The most common problems we see are:
- Sealant pulling away from one side of the joint
- Old sealant gone brittle and cracked
- Joints with sealant missing in places
- Rain getting behind render or cladding at a joint
In and around Blackhills, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Questions to ask before you book
- How much experience the applicator has
- How the colour is chosen
- Whether they’re fully insured
- Which sealant they’ll use, and why
Why it’s worth doing now in Blackhills
Mortar or ordinary filler might look like a quick way to close an open joint, but it locks the joint solid. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. Exposed walls in smaller Scottish places take a lot of wind and rain, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, drop us a line at info@mrmastic.co.uk and we’ll give you an honest view and a quote.
Why book with us
- You choose the colour before work begins
- White, clear, grey or coloured to suit, where the product allows
- Every job guaranteed for a year
- More than 20 years in sealant work
Read our cost guide or our reviews.
How the visit works
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Around Blackhills, distance and access matter more than parking. Let us know how to find you and how to reach the joints, and the visit is planned around that.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- Mention any tricky access
- Plan for the work area to be out of bounds to pets and children
Get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.