Stirling · Scotland
Tyndrum Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Tyndrum and across Stirling. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic that needs renewing before redecorating
- Weathered mastic on the most exposed windows
- Draughts and rain around sash boxes
Sand mastic in Tyndrum, done properly
If your home is listed or in a conservation area, check with your local planning authority whether consent is needed for work to windows. Like-for-like sand mastic is often the preferred finish. We work on brick reveals, sash and case windows and period & listed homes, and people most often call us about modern sealant on a period surround and open joints round the window box.
Mastic can only go onto a dry joint, so outside work in Tyndrum depends on the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
Every job comes with a 12-month guarantee.
- Where
- Tyndrum (FK20)
- Wider area
- Stirling
- Cover
- One year on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What happens if it’s left?
Filling over old, loose mastic does not last. We remove the loose material first so the new mastic stays put. Around Tyndrum, water from a failed joint in an older stone home can soak into timber and plaster, which is a far bigger job than the sealant.
What it costs depends on how much there is to do, 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 us?
- Trusted Arbo and Everbuild sealants
- Homes, businesses and hotels
- ARBOMaster approved applicator
- 180+ five-star Google reviews
Take a look at how sealant jobs are priced or what customers say.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Get any rot dealt with first
- Make sure water runs off the sill
- Inspect the joints round the windows every year or so
- Leave the new mastic unpainted
Leave the new mastic unpainted, as traditional guidance advises. If you’re redecorating, ask us first.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Nearby places to Tyndrum
What else we do in Tyndrum
How the visit works
All our tools and materials come with us in the van. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours for a single window, longer for several. Outside jobs in Tyndrum need a dry day, because sealant will not bond to a wet joint, so external jobs may need to move if the day turns wet. Indoor work goes ahead whatever the weather.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any previous sealing or DIY attempts
- Mention any leaks or damp you’ve noticed
Get a quote
Asking for a quote is easy: tell us what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we’ll take it from there.
Advice
Common questions in Tyndrum
Is Tyndrum in your area for sand mastic?
Yes, Tyndrum is within the area we cover. Our work covers the whole of Scotland. You can email us at info@mrmastic.co.uk and let us know what needs doing.
Do you cover smaller places like Tyndrum?
Yes. Tyndrum is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
What is sand mastic?
Sand plus a binder based on linseed oil. It’s built up in the joint by hand and shaped to suit the surround.
Can you quote for more than one area?
Yes. Just list everything you need and you’ll get one quote.
Can sand mastic be painted?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Are you fully insured?
Yes. We’re fully insured for every job we do.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
Can you match the sealant colour?
We will suggest a colour to suit the surroundings. The choice depends on the product the joint needs.
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Windows and doors in Tyndrum
Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
If you let a flat or house near Tyndrum Lower station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Tyndrum is about 30 miles north of Helensburgh, in Stirling. Tyndrum gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Tyndrum is one of 55 towns and villages in Stirling we cover for sand mastic. Glasgow is on our list too, about 44 miles from Tyndrum.
Postcode districts we cover here for sand mastic: FK20. We also cover the places around Tyndrum: Clifton (1 mile north-west), A' Chrìon Làraich (5 miles south-east), Bridge of Orchy (6 miles north), Inverarnan (8 miles south) and Ardlui (10 miles south).
Landmarks near Tyndrum
Tyndrum has its own railway station: Tyndrum Lower station. Not far away are Lochan na Bì.
When to call us in Tyndrum
Paint, silicone or cement used over old mastic causes problems. They don’t suit the joint, and they normally need raking out.
Keep an eye out for any of the following:
- Failed mastic on an exposed elevation
- Modern sealant on a period surround
- Old cement repairs round a window that have failed
- Wind and rain getting in round a sash window
Around Tyndrum, as everywhere, sand mastic is only as good as the preparation behind it.
Comparing quotes
- Are they insured?
- How long to leave it before use
- How the colour is chosen
- How much experience the applicator has
For landlords and businesses
We work for landlords and letting agents as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Crumbling stone or brickwork round the window
- Rotten sashes, sills or window boxes (a joiner’s job)
- Broken panes
If you are not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Timber door frames
- Sash and case windows
- Period & listed homes
- Tenement windows
- Stone surrounds
- Brick reveals