Na h-Eileanan Siar · Scotland
Aiginis External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Aiginis and across Na h-Eileanan Siar. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Plants rooting in failed movement joints
- Cracked joints where brick meets render or frames
- Joints pointed up with cement by mistake
About our external mastic in Aiginis
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where a rigid filler would soon crack. If you’re dealing with joints where the bead has come unstuck and failed sealant between panels on a façade, we can put it right, whatever the surface.
In and around a place like Aiginis, many buildings face open ground and take the full weather. Outside joints on exposed walls work hard, so they need a sealant that moves with the building.
All our work comes with our one-year guarantee.
- Where
- Aiginis (HS2)
- Region
- Na h-Eileanan Siar
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Surface by surface
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. Backing rod sized to the joint sets it so the sealant is not too deep.
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. The old joint is removed and a sealant that bonds to both sides goes in.
Also in Aiginis
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Never let anyone fill a movement joint with mortar
- Keep soil, plants and ivy away from the joints
- Deal with leaking gutters that soak the joints below
- Leave the joints unpainted unless we have said otherwise
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.
Once a joint cannot move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.
Common questions in Aiginis
Do you cover Aiginis for external mastic?
Yes. We work across all of Scotland, and Aiginis is part of that. Just email us at info@mrmastic.co.uk with a few details of the job, and we will send you a clear quote.
Does the coastal weather in Aiginis affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
How do I get a quote for external mastic in Aiginis?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Do the sealants smell?
Possibly a little. Any smell clears as the sealant cures.
What do you put in the joint?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll explain our choice.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and we’ll quote it together.
How long does the job take?
As a guide, most jobs take a few hours to a few days, depending on the length of joint and the access. Larger jobs naturally take longer, and we will say how long yours will take.
Can you seal joints between render and window frames?
Yes. Different materials move at different rates, so the joint between them must be flexible. We choose one that suits both surfaces.
Why act early in Aiginis
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. In a place like Aiginis, small leaks are easy to put off, but water through a failed joint keeps working away until it’s fixed.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts.
Why Aiginis clients choose us
- Rated 4.9 stars on Google
- Over 20 years’ experience
- White, clear, grey or coloured to suit, where the product allows
- Experience in homes, commercial sites and hotels
Read what affects the cost and customer reviews.
Walls and rooflines in Aiginis
Aiginis is within about 1 mile of 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. Harled (roughcast) walls are common in Scotland, and joints where harling meets other materials need a sealant that can grip and flex.
Around Aiginis, as everywhere, external mastic is only as good as the preparation behind it. For jobs in and around Aiginis, choosing the right material for each joint is as important as a tidy finish.
Aiginis (Gaelic: Aignish) is in Na h-Eileanan Siar. If you need external mastic in Aiginis, it’s easy to get a quote: please drop us a line at info@mrmastic.co.uk. We’re based in Crawley and cover Na h-Eileanan Siar, Aiginis included. We cover 87 towns and villages across Na h-Eileanan Siar, large and small.
Jobs for external mastic in HS2 is quoted and booked the same way as anywhere else. If you’re just outside Aiginis, we cover Na h-Eileanan an Iar (1 mile north-east), Knock (1 mile east), Lower Bayble (2 miles east), Garrabost (2 miles north-east) and Pabail Uarach (3 miles east). For island and remote addresses, the job takes a little more planning, so let us know when you get in touch.
Local landmarks in Aiginis
A little further out are Lewis Loom Centre (3.8 miles west) and Western Isles Hospital (3.8 miles west).
Landlords, agents and businesses in Aiginis
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
What we do, step by step
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself usually takes anything from a few hours to several days, depending on the building, depending on the amount of work. Somewhere like Aiginis may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
- Keep children and pets away from the work area
Ask for a quote
We do not publish a price list. Instead, your job gets its own clear quote. To arrange one, drop us a line at info@mrmastic.co.uk.
Related advice
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
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 does not work out, we can still put it right.
What sealant work can’t fix
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Rising or penetrating damp from elsewhere in the wall
- Cracks in the bricks or render themselves, away from the joints
- Subsidence or other structural problems
If you are not sure, just send an email to info@mrmastic.co.uk and we’ll give you a straight answer.
Joints and surfaces we work on
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames
- Façade panels
- Concrete & block
- Copings & trims