West Lothian · Scotland
External & façade joints in Blackness, West Lothian
We cover Blackness for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Moss and dirt in joints with no sealant left
- Sealant that has lost its bond to the brick or render
- Gaps where render, brick and frames meet
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
External mastic in Blackness, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Some surfaces need a primer before sealing. We work on brickwork movement joints, joints between brick and frames and render & cladding joints, and the jobs we see most are panel joints letting water in and hard, crazed mastic that has stopped moving.
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.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Where
- Blackness (EH49)
- Region
- West Lothian
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
What we are called out for in Blackness
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
Any of these means the joints need attention:
- Brick movement joints where the sealant has split
- Hard, crazed mastic that has stopped moving
- Failed sealant between panels on a façade
- Damp patches traced to an open external joint
Letting a property close to Linlithgow station? Then split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- Whether VAT is included
- Are they insured?
- How the surfaces are prepared before sealing
- Who turns up on the day
Landlords, agents and businesses in Blackness
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Landlords and agents in Blackness can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
What we can’t put right
To be straight with you, some problems need a different trade:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Failed render or damaged cladding panels
- Walls that need new movement joints cut into them
If you are not sure, just email us at info@mrmastic.co.uk and we will give you a straight answer.
Surfaces we seal
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
- Copings & trims
- Façade panels
How the job changes by surface
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. We prime where the sealant needs it before sealing.
Common questions in Blackness
Does living near the coast affect external mastic in Blackness?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Do you work for landlords with property near Linlithgow station?
Yes. We work for landlords and agents as well as householders. Just drop us a line at info@mrmastic.co.uk with the address and what needs doing, and we will send you a clear quote.
Where are you based?
Mr Mastic is based in Crawley. We cover Blackness and the rest of West Lothian.
Is there a guarantee?
Yes. Each job is guaranteed for twelve months, large or small.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do you use backing rod?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding, so the joint can move.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Towns and villages near Blackness
What else we do in Blackness
What happens if it’s left?
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. Out of town in Scotland, exposed walls take a lot of weather, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why Blackness customers choose us
- Old sealant always removed completely
- An ARBOMaster approved applicator
- Sealant colour chosen to suit
- 12-month guarantee on every job
See our cost guide or what customers say.
How the visit works
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes anything from a few hours to several days, depending on the building from start to finish. Around Blackness, distance and access matter more than parking. Tell us how to find the property and how to reach the work.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- 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.
Before we arrive
- Keep pets and children clear of the area while we work
- On commercial sites, let us know about site rules
- Let us know about stairs, lifts or work at height
Getting a quote
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll explain what’s involved and give you a clear quote.
Related advice
Outside joints around Blackness
Blackness is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
Around Blackness, as everywhere, external mastic is only as good as the preparation behind it.
Blackness is about 3 miles east of Bo'ness, in West Lothian. Anywhere in EH49, we can carry out external mastic at your property. Blackness is one of 58 towns and villages in West Lothian we cover for external mastic. Edinburgh is on our list too, around 13 miles away.
Here we cover the EH49 postcode area for external mastic. Nearby, we also carry out external mastic in Muirhouses (2 miles west), Charlestown (2 miles north), Crombie (3 miles north), Cairneyhill (4 miles north) and Torryburn (4 miles north-west). Further out, we also cover Livingston (7 miles south), Bathgate (9 miles south-west), Linlithgow (4 miles south-west), Whitburn (12 miles south-west), East Calder (8 miles south) and Broxburn (5 miles south).
What’s near Blackness
The closest station to Blackness is Linlithgow station, about 3.4 miles south-west. A little further out are Blackness Castle (under half a mile north-east) and Boness Motor Museum (2.7 miles west). Open spaces near Blackness include Linlithgow Loch.