Argyll and Bute · Scotland
Sand Mastic in Strachur
Professional sand mastic in and around Strachur, with old sealant always removed completely and a one-year guarantee.
- Gaps between timber frames and stone or brick
- Wind and rain getting in round a sash window
- Failed mastic on an exposed elevation
Sand mastic for homes and businesses in Strachur
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s made from sand and a linseed-oil-based binder and built up by hand. On period homes, it looks right where silicone wouldn’t. We work on tenement windows, sash and case windows and period & listed homes, and the jobs we see most are a silicone bead on a sash window that spoils the look and gaps round a timber door in stone or brick.
Many older Scottish homes still have timber windows set into stone walls. The sealant has to suit the stone, which rules out acetoxy silicones that can mark or attack it.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Strachur (PA27)
- Region
- Argyll and Bute
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
In hotels, rooms out of use cost money, 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.
The process
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to a full day, depending on how many windows and we leave things clean and tidy. Outdoor work around Strachur depends on the weather, as sealant needs a dry surface, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know if you’ve seen damp or leaks
- Tell us about any previous sealing or DIY attempts
Getting a quote
We quote each job on its own, so start by telling us what you need. Simply email us at info@mrmastic.co.uk and describe the job, and pictures are welcome.
Related advice
Your questions about sand mastic in Strachur
Do you cover Strachur for sand mastic?
Yes, Strachur is within the area we cover. We work across all of Scotland. You can send an email to info@mrmastic.co.uk and let us know what needs doing.
Does the coastal weather in Strachur affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. Walls facing the sea are normally the first to need attention.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can landlords and businesses book you?
Yes, we do. Domestic, commercial and hotel work are all part of what we do, and we’re fully insured.
Can I paint the new mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
How long does sand mastic take to go off?
A skin forms quite soon, but full hardening takes longer. We’ll tell you what to expect for your job.
What exactly is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
Is it messy?
No. The area is protected while we work and cleaned up afterwards.
Why act early in Strachur
Cement-based fillers and modern sealants don’t always suit a period surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. 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.
Doing several joints on one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Why us?
- We’re fully insured
- Over 20 years’ experience
- Trusted Arbo and Everbuild sealants
- Sanitary silicone with an anti-fungal additive in wet areas
Nearby places to Strachur
Also in Strachur
What sealant work can’t fix
We will not take on work that will not last, so here’s what sealant can’t put right:
- Sashes that need overhauling
- Damaged stone surrounds
- Decayed frames that need repair
Not sure which it is? You can email us at info@mrmastic.co.uk and we will tell you honestly before booking.
Joints and surfaces we work on
- Period & listed homes
- Tenement windows
- Stone surrounds
- Sash and case windows
- Timber door frames
- Brick reveals
What sand mastic looks like in Strachur
Strachur is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around older windows and doors, especially on the side facing the sea. Strachur is in the west of Scotland, which is wetter than the east, which means the mastic around older windows and doors has to cope with a lot of rain.
Around Strachur, as everywhere, sand mastic is only as good as the preparation behind it.
Strachur is about 17 miles north-west of Helensburgh, in Argyll and Bute. Across the PA27 area, we can carry out sand mastic at your property. Across Argyll and Bute, we cover 118 places, Strachur among them. For nearby work, see our Glasgow page (37 miles or so).
Here we cover the PA27 postcode area for sand mastic. If you need sand mastic at a property on Montgomery Place, Manse Gardens and Forest View or anywhere close by, our applicators can take on the job. If you’re just outside Strachur, we cover Inbhir Aora (4 miles north), Inveraray (4 miles north), Lochgoilhead (6 miles east), Cairndow (8 miles north-east) and Minard (8 miles south-west). Within a short drive, we also cover Rhu (15 miles south-east), Garelochhead (11 miles south-east) and Sandbank (14 miles south). Island and remote addresses take a little more planning, so tell us where you are when you ask for a quote.
Landmarks near Strachur
Other landmarks nearby include Strachur Smiddy Museum (under half a mile north-west).
What we are called out for in Strachur
Most of it is simply age. Even well-laid mastic needs renewing in time, depending on exposure and upkeep.
These are the problems we are asked about most:
- Draughty sash windows at the surround
- Weathered mastic on the most exposed windows
- Patchy fillers round a sash window
- Cracked mastic round a front door frame
For an older house near a landmark such as Kilmaglash Parish Church and Sculptured Stones, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Questions to ask before you book
- What happens if the job turns out different
- Whether they seal over old material or remove it
- The length of the guarantee
- Who does the work, and how experienced they are
DIY versus a professional finish
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Some sealant jobs are within reach of a careful DIYer, 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.
Different surfaces, different methods
Period and listed homes
A traditional finish suits a period property, and sand mastic is one of them.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.