Argyll and Bute · Scotland
Kilmun Sand Mastic
We cover Kilmun for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Gaps round a timber door in stone or brick
- Old cement repairs round a window that have failed
- Modern sealant on a period surround
Sand mastic for homes and businesses in Kilmun
Traditional burnt sand mastic blends with stone and brick surrounds. It suits period and listed homes, where modern sealant can look out of place. We are often asked to deal with modern sealant on a period surround and failed mastic on an exposed elevation, on tenement windows, brick reveals and timber door frames.
Outdoor sealant needs a dry surface, so window work around Kilmun is planned around the weather. Tell us about access to all the windows and doors, upstairs included.
Whatever the size of the job, it’s backed by our 12-month guarantee in Kilmun and across Argyll and Bute.
- Where
- Kilmun (PA23)
- Wider area
- Argyll and Bute
- Cover
- A year, on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What sand mastic looks like in Kilmun
Kilmun is close to 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. The west of Scotland is wetter than the east, so there’s plenty of rain for the mastic around older windows and doors to keep out.
In the older streets around St Munn's Parish Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Managing a site like Dunoon Grammar School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Kilmun is about 7 miles north-west of Greenock, in Argyll and Bute. Homes, rented property, offices and hotels in Kilmun is covered for sand mastic, old or new, large or small. The work is guaranteed for a year. 118 places in Argyll and Bute are on our list. We also work in Glasgow, about 28 miles from Kilmun.
Jobs for sand mastic in PA23 is quoted and booked the same way as anywhere else. We cover properties on Midge Lane, Shore Road and Graham's Point and the roads around them. With the A880 close by, Kilmun is easy for our applicators to reach. We also cover the places around Kilmun: Tom nan Ragh (1 mile west), Sandbank (1 mile south), Strone (2 miles south-east), Hunters Quay (3 miles south-east) and Kirn (3 miles south-east). Larger places within reach include Helensburgh (8 miles east), Rothesay (12 miles south), Rhu (7 miles east), Garelochhead (7 miles north-east), Port Bannatyne (11 miles south-west) and Innellan (7 miles south). If you’re somewhere remote, the job takes a little more planning, so let us know when you get in touch.
Landmarks near Kilmun
Nearby you will also find Castle House Museum (3.5 miles south) and Cowal Community Hospital (2.6 miles south). The countryside around Kilmun includes Loch Loskin and Clach Bheinn.
Nearby places to Kilmun
Also in Kilmun
What we do, step by step
We keep the work tidy and contained to the area we are working on, so you can carry on as normal. The job normally takes a few hours for a single window, longer for several. For a place like Kilmun, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Move anything stored near the joints
- Where the joints are inside, avoid wetting them before we arrive
- Keep pets and children clear of the area while we work
Get a quote
To get a quote, send an email to info@mrmastic.co.uk and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
Read more
Kilmun: your questions answered
Is Kilmun within the area you cover?
Yes, Kilmun is covered. Our work covers the whole of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you do sand mastic in Kilmun?
Yes, Kilmun is within the area we cover. We work across all of Scotland. Just email us at info@mrmastic.co.uk with a few details of the job, and we’ll give you a clear price.
Do you do commercial work?
Yes. We can plan bigger jobs in stages.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply email us at info@mrmastic.co.uk.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
What is sand mastic?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
How long does sand mastic take?
It depends on the size of the job, but most jobs take anything from a few hours to a full day, depending on how many windows. We’ll tell you when we quote.
How long does sand mastic take to go off?
Not straight away. It skins first and hardens fully later, and we will tell you what to expect.
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Do not paint over the new mastic
- Do not run silicone over sand mastic
- Ask the planning authority about consent for listed or conservation-area homes
- Avoid heavy scraping on the mastic joint
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber and timber that stays wet can rot.
Different surfaces, different methods
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Stone surrounds
Sand mastic sits naturally against stone. It finishes to look like part of the surround.
Quotes for sand mastic in Kilmun
For a quick quote, just ask. The main things that affect it are:
- When we can work, for business premises
- The size of the job
- Which sealant suits the joint
- Access and height
We don’t show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Helping us quote
To make quoting easier, let us know:
- The rough size of the job
- If it’s domestic, commercial or a hotel
- Where the property is
- Whether it has been sealed before
We quote each job on its own, so start by telling us what you need. Just drop us a line at info@mrmastic.co.uk with the details and send pictures if you have them.
For landlords and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
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.
Why deal with it now?
An open joint round the frame lets weather in. Water can get to the frame and the masonry, so dealing with it now protects both. In a place like Kilmun, small leaks are easy to put off, but water through a failed joint keeps working away until it’s fixed.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we will explain what it covers.
Why us?
- 20+ years of sealant experience
- Anti-fungal sanitary silicone in wet areas
- An ARBOMaster approved applicator
- Fully insured
Read what affects the cost and our reviews.
What sealant work can’t fix
In fairness, some problems need a different trade:
- Sashes that rattle, stick or will not open
- Broken panes
- Rotten sashes, sills or window boxes (a joiner’s job)
If you’re not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer.
What we seal
- Brick reveals
- Sash and case windows
- Tenement windows
- Timber door frames
- Period & listed homes
- Stone surrounds