Highland · Scotland
Window & door mastic in Keiss, Highland
Window mastic across Keiss and nearby, with old sealant always removed completely and a one-year guarantee.
- Rushed sealant from a window installation
- Cracked sealant at the sill ends
- Mastic that’s falling out in pieces
How the job changes by surface
Aluminium frames
Aluminium needs a sealant that bonds to coated metal, and acetoxy silicones are not used, as they can attack some metals. Neutral-cure sealant is the safe choice.
Composite doors
A composite door usually sits in a plastic outer frame, and the joint around it is sealed like a window. The bead is colour-matched to the frame.
Window mastic for homes and businesses in Keiss
Colour matters on a frame. We can seal in white, brown, anthracite grey, black or clear, so the bead blends with the window rather than framing it. We work on patio & French doors, window sills and composite doors, and common reasons people get in touch are black, perished sealant on frames and untidy mastic left by window fitters.
Outdoor sealant needs a dry surface, so window work around Keiss is planned around the weather, and longer journeys are planned in advance. Tell us about access to all the windows and doors, upstairs included.
Whatever the size of the job, you get the same 12-month guarantee in Keiss and across Highland.
- Place
- Keiss (KW1)
- Region
- Highland
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
For landlords and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.
For anyone letting property in or around Keiss, several properties can be quoted together. Just tell us the addresses and what each one needs.
Do you need window mastic in Keiss?
A lot of older mastic was never designed to stay flexible. Once it has hardened, the frame’s movement tears it from the wall, and a gap opens along one edge.
Signs it’s time to call us include:
- Mastic that’s falling out in pieces
- Gaps left after new windows were fitted
- Damp patches on the reveal after heavy rain
- Cold air getting in at the frame edge
In and around Keiss, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
What your quote should include
- Which sealant they’ll use, and why
- Whether they’re fully insured
- What preparation is included
- What happens if they find a problem under the old sealant
Why deal with it now?
Redecorating is a good moment to renew the mastic. Fresh joints finish the job neatly, and it’s easier while the walls are being worked on anyway. Exposed walls in smaller Scottish places take a lot of wind and rain, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why us?
- Sealant colour chosen to suit
- Sanitary silicone with an anti-fungal additive in wet areas
- A choice of colours where the product allows
- We never seal over old sealant
Frames and glazing around Keiss
Keiss 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. 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.
Homes close to Church of Scotland include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Keiss is about 15 miles east of Thurso, in Highland. Keiss gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Our area takes in 253 places across Highland.
Jobs for window mastic in KW1 works the same way as everywhere else we cover. If you need window mastic at a property on High Street, South Street and Robertson Crescent or anywhere close by, we can help. Close by, we work in Reiss (4 miles south), Ackergillshore (4 miles south), Hastigrow (5 miles west), Staxigoe (6 miles south-east) and Haster (6 miles south). For island and remote addresses, the job takes a little more planning, so mention it when you ask for a quote.
Local landmarks in Keiss
A little further out are Caithness Broch Centre (2 miles north-east) and Keiss Castle (0.7 miles north-east). The countryside around Keiss includes Loch of Wester.
How we quote for window mastic
Your quote is based on your job. We look at:
- Any working-time requirements on site
- Whether old sealant or filler has to be cut out
- Which sealant suits the joint
- Whether the work is at height
Rather than a set price list, 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.
What to tell us for a quote
What to tell us when you ask for a quote:
- A few pictures by email, if you can
- Roughly how big the job is
- The address or postcode of the job
- If it’s domestic, commercial or a hotel
To get a quote, drop us a line at info@mrmastic.co.uk with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
What we do, step by step
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The work itself takes most of a day for a typical house, less for a few frames. For a place like Keiss, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Every joint is checked before we leave.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Let us know about stairs, lifts or work at height
- Move anything stored near the joints
How to get a quote
Every job is quoted individually, so start by telling us what you need. Just send an email to info@mrmastic.co.uk with the details.
Advice
FAQs for Keiss
Does the coastal weather in Keiss affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Is Keiss in your area for window mastic?
Yes, Keiss is within the area we cover. We work across all of Scotland. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Can resealing stop a draught around my window?
Often, yes. Air often gets in between the frame and the wall, and resealing inside and out closes it.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses and we are fully insured.
Can you get sealant to suit coloured frames?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames generally suit brown.
Is it worth trying it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Do you work on first-floor windows?
Yes, as long as they can be reached safely. Let us know about access when you ask for a quote and we’ll plan for it.
Other services in Keiss
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.