Highland · Scotland
Sand Mastic in Colbost
Problem with your window and door surrounds in Colbost? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Silicone on a period window that looks wrong
- Draughty sash windows at the surround
- Cracked mastic round a front door frame
About our sand mastic in Colbost
Sand mastic does not last for ever and gaps open up round the frame. We rake it out and renew it and tidies the surround. We work on tenement windows, timber door frames and period & listed homes, and common reasons people get in touch are failed mastic on an exposed elevation and crumbling sand mastic round a window.
Older stone-built homes in Scotland often have sash and case or timber windows set in stone. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Place
- Colbost (IV55)
- Wider area
- Highland
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
How it works
Once we are on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a single window, longer for several. Outside jobs in Colbost 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. Work indoors is not affected.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic isn’t too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
Get a quote
If you’re in Colbost and need sand mastic, email us at info@mrmastic.co.uk. Tell us what the problem is and where, and you will get a clear quote before work begins.
Advice
Landlords, agents and businesses in Colbost
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
We also work for property managers and facilities teams in Colbost and across Highland. Several sites can go on one quote, and we are fully insured.
What sand mastic looks like in Colbost
Colbost 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. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
In and around Colbost, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Colbost (Gaelic: Cealabost) is in Highland. Our applicators cover sand mastic for homes and businesses in Colbost and nearby. Colbost is one of 253 towns and villages in Highland we cover for sand mastic.
All of IV55 is within our area for sand mastic. You will find Colbost on the B884, which makes it straightforward to reach with everything needed for sand mastic. Neighbouring places we cover for sand mastic include Kilmuir (2 miles east), Dunvegan (3 miles east), Lonmore (3 miles east), An t-Aodann Ban (8 miles east) and Clachamish (11 miles east). For island and remote addresses, a little more planning is needed, so mention it when you ask for a quote.
What’s near Colbost
Nearby you will also find Dunvegan Castle (1.9 miles east) and Colbost Croft Museum (less than half a mile north-west). For a walk, there’s Healabhal Mhòr and Loch Druim a' Chaoil.
Common problems we fix in Colbost
Age is the main cause. Even well-laid mastic needs renewing in time, depending on exposure and upkeep.
Any of these means the joints need attention:
- Weathered mastic on the most exposed windows
- Patchy fillers round a sash window
- Gaps where the frame meets the masonry
- Draughts and rain around sash boxes
For jobs in and around Colbost, choosing the right material for each joint is as important as a tidy finish.
Questions to ask before you book
- What the quote includes, VAT included or not
- What guarantee comes with the work
- What product goes in the joint
- How long to leave it before use
Quotes for sand mastic in Colbost
Jobs vary more than people expect. What affects the quote:
- Any working-time requirements on site
- The product the joint needs
- How many areas need sealing
- The amount of work
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, email us at info@mrmastic.co.uk for an honest opinion and a quote.
Helping us quote
When you call or email, it’s useful to know:
- Where the job is, and your postcode
- Whether it’s a home or a business
- A few pictures by email, if you can
- How we’d reach the joints
We quote each job on its own, so the first step is telling us about yours. Simply send an email to info@mrmastic.co.uk and describe the job, and photos are welcome.
Places near Colbost
Other services in Colbost
Keeping the joints in good condition
Aftercare is simple, and it makes a real difference:
- Get any rot dealt with first
- Check with your local planning authority if your home is listed
- Leave the new mastic unpainted
- Sort the mastic before the decorators arrive
Do not touch or press the mastic while it hardens. It skins over quickly, but takes longer to harden fully.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Should I try it myself first?
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.
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.
Your questions about sand mastic in Colbost
Will you come out to Colbost?
Yes, smaller places are covered as well as towns. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
Does the coastal weather in Colbost affect outside sealant?
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 usually the first to need attention.
Do you have insurance?
Yes. We are fully insured.
Should I try DIY first?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
How long does sand mastic take to harden?
It forms a skin fairly soon and it hardens fully over a longer time. Timing depends on the weather and the joint.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Can I paint the new mastic?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
What happens if it’s left?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic does not seal it and traditional guidance is to leave the new mastic unpainted. Exposed walls in smaller Scottish places take a lot of wind and rain, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
What you get with us
- ARBOMaster approved applicator
- Trusted Arbo and Everbuild sealants
- We leave the area clean and tidy
- Over 20 years’ experience
Read our cost guide and what customers say.