Stirling · Scotland
Sand mastic for sash & case windows in Killin, Stirling
Professional sand mastic in and around Killin, with every bit of old sealant taken out first and a 12-month guarantee.
- Wind and rain getting in round a sash window
- Gaps where the frame meets the masonry
- Tired mastic found when preparing windows for paint
How we handle sand mastic in Killin
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditional guidance is not to paint over it and we will advise if you are redecorating. Common call-outs are for window mastic to renew ahead of painting and crumbling sand mastic round a window, across brick reveals, sash and case windows and stone surrounds.
Many older Scottish homes still have timber windows set into stone walls. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Place
- Killin (FK21)
- Region
- Stirling
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
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 are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Places near Killin
Also in Killin
Common problems we fix in Killin
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:
- Mastic worn away on windows facing the weather
- Patchy fillers round a sash window
- Tired mastic found when preparing windows for paint
- A silicone bead on a sash window that spoils the look
In and around Killin, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Questions to ask before booking
- How the colour is chosen
- How hidden problems are handled
- What insurance they hold
- How the joint is cleaned and prepared
Quotes for sand mastic in Killin
There’s no set price list. The quote depends on:
- How much old sealant there is and how hard it is to remove
- Working hours on commercial sites
- How easy the joints are to reach
- The size of the job
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
What we need to know
When you call or email, it’s useful to know:
- Whether it has been sealed before
- Roughly how big the job is
- The type of property
- The problem you’ve noticed
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. When it suits you, send an email to info@mrmastic.co.uk.
What happens on the day
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes anything from a few hours to a full day, depending on how many windows from start to finish. Outside jobs in Killin need a dry day, because sealant will not bond to a wet joint, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Mention any parking rules near the property
- Move anything stored near the joints
- Let us know if you’ve seen damp or leaks
Getting a quote
We do not publish a price list. Instead, your job gets its own clear quote. To get started, drop us a line at info@mrmastic.co.uk.
Advice
For landlords and businesses
For anyone letting property in or around Killin, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
What sand mastic looks like in Killin
Sash and case windows are common in older Scottish homes, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
For jobs in and around Killin, choosing the right material for each joint is as important as a tidy finish.
Killin is about 28 miles north-west of Stirling, in Stirling. Whether you’re in the middle of Killin or further out, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. Across Stirling, we cover 55 places, Killin among them. There’s also a page for Glasgow, about 42 miles away.
Work in FK21 works the same way as everywhere else we cover. Whether your property is on Main Street, Laggan Gardens and Ballechroisk Court or anywhere close by, our applicators can take on the job. If you are just outside Killin, we cover Lochearnhead (6 miles south), St Fillans (9 miles south-east), Strathyre (10 miles south), Boreland (12 miles north-east) and Fearnan (12 miles north-east).
What’s near Killin
Nearby you’ll also find Finlarig Castle (0.6 miles north). Open spaces near Killin include Lochan Lairig Cheile.
When it is not the sealant
Before booking, it’s worth knowing the limits too:
- Sash cords, weights and draught-proofing of the sashes
- Masonry that needs repairing
- Whether work needs listed building consent
If you are not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer.
Where we work in Killin
- Sash and case windows
- Brick reveals
- Stone surrounds
- Tenement windows
- Period & listed homes
- Timber door frames
How to look after the new joints
A little care helps the new joints last. We recommend:
- Check with your local planning authority if your home is listed
- Renew mastic before redecorating the windows
- Get any rot dealt with first
- Do not run silicone over sand mastic
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Good mastic helps keep the frame dry. Once it fails, water can sit against the timber and timber that stays wet can rot.
Killin: your questions answered
Is Killin in your area for sand mastic?
Yes, Killin is within the area we cover. Our work covers the whole of Scotland. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing.
Is sand mastic in Killin guaranteed?
All our work, in Killin and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Does someone need to be in?
That depends on where the joints are. Inside work needs someone to give us access, and for outside work we will agree access with you when we book.
Is it possible to take out silicone and use sand mastic instead?
Yes. We remove the silicone and clean the joint before the sand mastic goes in.
Do I need permission for sand mastic on a listed building?
Your local planning authority is the one to ask. They’ll tell you if consent is needed.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Can I paint the new mastic?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.