Highland · Scotland
Window & door mastic in Strontian, Highland
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Strontian. Fully insured, ARBOMaster approved and guaranteed for a year.
- Hard, cracked sealant around windows
- Cracked internal joints between frame and plaster
- Rain getting in at the frame or under the sill
What happens if it’s left?
A cracked joint around a frame lets rain into the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. A reseal is a much smaller job. Out of town in Scotland, exposed walls take a lot of weather, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Why book with us
- Neat joints and a tidy finish
- Trusted Arbo and Everbuild sealants
- We never seal over old sealant
- Anti-fungal sanitary silicone in wet areas
Take a look at our cost guide or customer reviews.
How we handle window mastic in Strontian
There are two joints on most windows. The external joint is the weather seal; the internal joint closes the gap to the plaster and stops draughts. We seal one or both, depending on what’s needed. Common call-outs are for leaking joints at the ends of sills and white mastic on grey or black frames, on patio & French doors, timber windows & doors and aluminium frames.
Mastic can only go onto a dry joint, so outside work in Strontian depends on the weather. Let us know about access to every frame, including any upstairs.
You get a one-year guarantee, the same in Strontian as everywhere else we work.
- Location
- Strontian (PH36)
- Wider area
- Highland
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Questions from Strontian
Does the coastal weather in Strontian affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Do you cover Strontian for window mastic?
Yes. Our work covers the whole of Scotland, and Strontian is part of that. Just drop us a line at info@mrmastic.co.uk with a few details of the job, and we’ll give you a clear quote.
Will there be a smell?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
Are you fully insured?
Yes. We’re fully insured.
Which products do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
Do you seal inside as well as outside?
Yes. Draughts often come through the inside gap too, so it can be worth sealing both.
Do you have sealant for grey or black windows?
Yes. We can use white, brown, anthracite grey, black or clear, so the joint suits the frame.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
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.
Landlord and commercial work in Strontian
Housing providers, facilities teams and property managers book us too in Strontian and across Highland. Several sites can go on one quote, and we’re fully insured for the work.
Hotels need rooms back in use, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
When it isn’t the sealant
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- A failed sealed unit that has misted up
- A sash or casement that won’t close properly
- A door that needs adjusting, rehanging or new seals
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we’ll tell you honestly.
Where we work in Strontian
- Aluminium frames
- uPVC windows
- Composite doors
- Window sills
- Patio & French doors
- Timber windows & doors
How it works
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take a few hours for a handful of frames, longer for a whole house. In smaller Scottish places, parking is generally less of an issue than access and distance. Let us know how to find you and how to reach the joints.
- We check how each frame can be reached safely.
- All the failed sealant is cut away.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
- Let us know about earlier repairs to the joints
Ask for a quote
Want a quote for window mastic? Please drop us a line at info@mrmastic.co.uk with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Read more
Common problems we fix in Strontian
Older frames were often sealed with products that set hard. Once it has hardened, the frame’s movement tears it from the wall, and a gap opens along one edge.
If you can see any of these, it’s time to have the joints looked at:
- Damp patches on the reveal after heavy rain
- Mastic that is falling out in pieces
- Cold air getting in at the frame edge
- Gaps where the sill meets the wall
For an older house near a landmark such as Strontian Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What to look for in a quote
- What product goes in the joint
- Is the old sealant removed completely?
- How hidden problems are handled
- Who does the work, and how experienced they are
Window mastic in Strontian: local notes
Strontian 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. Both are hard on the mastic around window and door frames, 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 window and door frames to keep out.
In and around Strontian, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
Strontian (Gaelic: Sron an t-Sithein) is in Highland. Homes, rented property, offices and hotels in Strontian can book us for window mastic. The work is guaranteed for a year. Our area takes in 253 places across Highland, from the larger towns to small villages. Our Glasgow page covers work nearby (76 miles or so).
Every address in PH36 is within our area for window mastic. That includes homes and businesses on Dal nan Each and Dal na Mart. If you’re just outside Strontian, we cover Acharacle (9 miles west), Ceann Loch Muideart (9 miles north-west), Port Appin (12 miles south-east), Appin (12 miles south-east) and Balliveolan (12 miles south). If you are somewhere remote, a little more planning is needed, so let us know when you get in touch.
Near you in Strontian
The countryside around Strontian includes Loch Doilet.
Nearby places to Strontian
Other services in Strontian
How the job changes by surface
Aluminium frames
Aluminium needs a sealant that bonds to coated metal. Neutral-cure sealant is the safe choice.
Patio & French doors
Not every patio door leak is a mastic problem: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We look for the cause first.