Shetland Islands · Scotland
Sullom Window Mastic
Our applicators work in Sullom on mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- White mastic on grey or black frames
- Rushed sealant from a window installation
- Cracked or shrunken mastic around the frame
Window mastic in Sullom
Colour matters on a frame. White, brown, anthracite grey, black and clear sealants are all available, so the bead blends with the window rather than framing it. If you are dealing with mastic that’s falling out in pieces and whistling draughts around closed windows, we can put it right, whatever the surface.
Mastic can only go onto a dry joint, so outside work in Sullom depends on the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
You get a 12-month guarantee, the same in Sullom as everywhere else we work.
- Location
- Sullom (ZE2)
- Region
- Shetland Islands
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
FAQs for Sullom
Will you come out to Sullom?
Yes, we do. We work across all of Scotland, islands included, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you do window mastic in Sullom?
Yes. We work across all of Scotland, and Sullom is part of that. You can email us at info@mrmastic.co.uk and tell us what needs doing.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
How long does it take to reseal the windows on a house?
Allow most of a day for a typical house, less for a few frames. Access and how stubborn the old mastic is affect the time most.
Do I need to be at home?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that normally means someone at home.
Can you seal the gap between the frame and the plaster indoors?
Yes. Inside, the joint between frame and plaster is sealed neatly.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Other services in Sullom
Surface by surface
Composite doors
Draughts round the door leaf usually come from worn seals or adjustment, not the mastic. We’ll tell you if that is what we find.
Timber windows & doors
Timber moves with moisture as well as heat, so the joint must stay flexible. The paint or stain needs to be sound where the sealant meets it.
DIY versus a professional finish
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Do you need window mastic in Sullom?
Mastic ages in the weather. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
People generally contact us after spotting something like this:
- Cracked sealant at the sill ends
- Rain getting in at the frame or under the sill
- Sealant in the wrong colour for the frame
- Cracked internal joints between frame and plaster
Around Sullom, as everywhere, window mastic is only as good as the preparation behind it.
Questions to ask before you book
- Which sealant they’ll use, and why
- How the joint is cleaned and prepared
- How hidden problems are handled
- Whether they’re fully insured
What affects the cost of window mastic
Call for a quick quote. What matters most is:
- The type of sealant required
- How easy the joints are to reach
- Mould in or behind the old joints
- The amount of work
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first.
What to tell us for a quote
Before you ask for a quote, have a think about:
- The rough size of the job
- Pictures of the joints, sent by email
- Whether it has been sealed before
- What the problem is, such as mould, gaps, leaks or cracking
We do not publish a price list, because every job is different. Instead, we give you a clear quote for your job. To get started, email us at info@mrmastic.co.uk.
The process
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes most of a day for a typical house, less for a few frames. For a place like Sullom, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- 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.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- We clear up and check every joint is fully closed.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
Get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we will talk you through the work.
Related advice
Landlord and commercial work in Sullom
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Windows and doors in Sullom
Sullom 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 is hard on the mastic around window and door frames, especially on the side facing the sea. Work on the islands has to be planned around ferry crossings and the weather, so give us as much notice as you can.
For jobs in and around Sullom, choosing the right material for each joint is as important as a tidy finish.
Sullom is in the Shetland Islands. If you need window mastic in Sullom, it’s easy to get a quote: please drop us a line at info@mrmastic.co.uk. We’re based in Crawley and cover the Shetland Islands. 63 places in the Shetland Islands are on our list.
Here we cover the ZE2 postcode area for window mastic. Close by, we work in Scatsta (2 miles east), Brae (3 miles south), Hogaland (4 miles north), Urafirth (5 miles north-west) and Hillswick (5 miles north-west). For island and remote addresses, a little more planning is needed.
What’s near Sullom
For a walk, there’s Loch of Stack-houlls.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Don’t paint over the silicone
- Look round the frames every year or so
- Wash the frames with mild soapy water
- Avoid blasting the frames with a pressure washer
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Keep paint off the silicone itself.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.