Na h-Eileanan Siar · Scotland
Cliasmol Sand Mastic
Sand mastic across Cliasmol and nearby, with old sealant always removed completely and a 12-month guarantee.
- Crumbling sand mastic round a window
- Gaps where the frame meets the masonry
- Gaps round a timber door in stone or brick
How we handle sand mastic in Cliasmol
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. We work on brick reveals, sash and case windows and tenement windows, and common reasons people get in touch are modern sealant on a period surround and mastic round period door frames that has failed.
Across smaller places in Scotland, homes range from stone and harled cottages to newer houses, many standing in the open. Exposed frames and sills take the full force of wind-driven rain, so the mastic there works hard.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Cliasmol (HS3)
- Wider area
- Na h-Eileanan Siar
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
How the visit works
At the end, we look at the finished work together. The work normally takes anything from a few hours to a full day, depending on how many windows, depending on the amount of work. Around Cliasmol, distance and access matter more than parking. Let us know how to find you and how to reach the joints.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Tell us about any previous sealing or DIY attempts
- Let us know about parking restrictions
Get a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we will explain what’s involved before giving you a price.
Related advice
How the job changes by surface
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair so it’s worth checking responsibilities.
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.
What sand mastic looks like in Cliasmol
Cliasmol is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
Whether the job is in Cliasmol itself or nearby, the right material for each joint matters as much as a neat finish.
Cliasmol is in Na h-Eileanan Siar. Whether you are in the middle of Cliasmol or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Cliasmol is one of 87 places in Na h-Eileanan Siar we cover.
Every address in HS3 is within our area for sand mastic, from the main roads to the quietest streets. Neighbouring places we cover for sand mastic include Tarbert (7 miles south-east), Direcleit (7 miles south-east), Miabhaig (8 miles south-east), Drinisiadar (10 miles south-east) and Greosabhagh (10 miles south-east). For island and remote addresses, the job takes a little more planning.
Landmarks near Cliasmol
Green spaces nearby include Ben Luskentyre and Loch Scourst.
Cliasmol questions
Does living near the coast affect sand mastic in Cliasmol?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
Is Cliasmol in your area for sand mastic?
Yes, Cliasmol 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, and we will give you a clear price.
Do you guarantee sand mastic work?
Every job comes with our 12-month guarantee.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we are using and why.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Do you work for landlords and businesses?
Yes, regularly. Several properties can go on one quote.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we will advise.
What sealant work cannot fix
It helps to know what we can’t do too:
- Timber that has rotted
- Broken panes
- Decisions on consent for listed homes
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we’ll tell you honestly.
What we seal
- Brick reveals
- Timber door frames
- Stone surrounds
- Tenement windows
- Sash and case windows
- Period & listed homes
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Clear gutters so water doesn’t pour onto the windows
- Look over the window mastic once a year
- Avoid patching sand mastic with silicone
- Find out about consent before window work on a listed home
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
For landlords and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Also near Cliasmol
More services for Cliasmol
Do you need sand mastic in Cliasmol?
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Signs it’s time to call us include:
- Open joints round the window box
- Window mastic to renew ahead of painting
- Weathered mastic on the most exposed windows
- Crumbling sand mastic round a window
Around Cliasmol, as everywhere, sand mastic is only as good as the preparation behind it.
Questions to ask before you book
- How the surfaces are prepared before sealing
- When the joint can take water or movement
- Who turns up on the day
- Is VAT in the price?