Shetland Islands · Scotland
Glazing Silicone in Haroldswick
Glazing silicone for conservatories, rooflights, glass panels and shower screens for Haroldswick, backed by a one-year guarantee. Ask us for a quote.
- Rooflight joints letting water in
- Sealant that was laid over old silicone and failed
- Water escaping where a screen meets the wall
What happens on the day
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes anything from an hour or two to most of a day, depending on the size of the job. For a place like Haroldswick, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- First we agree the joints to be done.
- Old sealant is removed from the glass and frame.
- The surfaces are cleaned with a suitable solvent.
- New glazing silicone goes in and is finished neatly.
- The joints are checked before we leave.
How to prepare
- Let us know about stairs, lifts or work at height
- Clear the area around the work
- Let us know about parking restrictions
Get a quote
Need a quote? Please drop us a line at info@mrmastic.co.uk and tell us about the job. We’ll explain what we’d do and give you a clear quote before any work starts.
Related advice
Glazing silicone for homes and businesses in Haroldswick
Many conservatory leaks come down to failed sealant at the glass-to-frame or frame-to-wall joints. We trace the leak to the joint and reseal it and tell you plainly if the cause is something else. We work on conservatory frames, glass-to-glass joints and glass balustrade bases, and common reasons people get in touch are sealant that was laid over old silicone and failed and glass-to-glass joints that have split.
Outdoor sealant needs a dry surface, so window work around Haroldswick is planned around the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
Every job comes with a 12-month guarantee.
- Where
- Haroldswick (ZE2)
- Region
- Shetland Islands
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What glazing silicone looks like in Haroldswick
Haroldswick is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on glazing joints and frame seals, which can dry out and crack sooner where a building faces the weather. Work on the islands has to be planned around ferry crossings and the weather, so the more notice, the better.
Around Haroldswick, as everywhere, glazing silicone is only as good as the preparation behind it. In the older streets around St John's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Haroldswick is in the Shetland Islands. Every kind of property in Haroldswick is covered for glazing silicone. The work is guaranteed for a year. Our area takes in 63 places across the Shetland Islands, from the larger towns to small villages.
Here we cover the ZE2 postcode area for glazing silicone. Local streets include Taftens, Nordabrake and Brakefield Crescent, and we cover them all. You will find Haroldswick on the B9087, which makes it straightforward to reach with everything needed for glazing silicone. Close by, we work in Baltasound (3 miles south-west), Clivocast (8 miles south), Cullivoe (9 miles south-west), Houbie (14 miles south) and Camb (15 miles south-west). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
Local landmarks in Haroldswick
A little further out are Unst Heritage Centre (0.6 miles south-west). Not far away are Little Heog and Loomer Shun.
Haroldswick: your questions answered
Does living near the coast affect glazing silicone in Haroldswick?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
Will you come out to Haroldswick?
Yes, we do. Our work covers the whole of Scotland, islands included, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can a conservatory leak be sealed?
It depends on the cause. Sealant joints we can renew, but roof panels and structural problems need a conservatory specialist or roofer.
What sealant do you use on glazing?
We use a neutral-cure glazing silicone suited to glass and the frame. In bathrooms, we use anti-fungal silicone.
Do you work for landlords and businesses?
Yes. We work for householders, landlords, letting agents, businesses and hotels across the Shetland Islands.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
Can I choose the sealant colour?
Usually, yes. White, clear and grey are common, and other colours are available for many products, and we agree the colour with you before we start.
Do you reseal glass shower screens?
Yes. We cut out the old silicone and reseal the glass-to-wall and glass-to-tray joints.
What sealant work can’t fix
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Structural problems with a conservatory roof
- Frames that have decayed or split
- A broken pane or roof panel
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly before booking.
Surfaces we seal
- Glass balustrade bases
- Glass-to-frame joints
- Rooflights
- Conservatory frames
- Shower screens
- Glass-to-glass joints
How to look after the new joints
After the cure time, these simple habits help:
- Do not use a blade near the sealant
- Ventilate the conservatory to cut condensation
- Keep conservatory gutters clear of leaves
- Check the silicone on glass every year or so
On shower screens, wipe or squeegee after use and keep the room ventilated. That slows mould growth on the bead.
A leaking shower screen may not show at first. It can damage the floor or the ceiling below before you spot it.
How we quote for glazing silicone
The price is agreed before any work begins. It’s based on:
- The old material and how stubborn it is
- How easy the joints are to reach
- The number and length of the joints
- Whether there’s mould to deal with
What it costs depends on how much there is to do, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Helping us quote
To make quoting easier, please include:
- Photos by email, if that’s easy
- Roughly how big the job is
- Any previous sealing or DIY work
- What the problem is, such as mould, gaps, leaks or cracking
There’s no standard price list. Instead, we send you a clear quote for your job. To get started, send an email to info@mrmastic.co.uk.
Can I do it myself?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What the job involves on each surface
Glass balustrade bases
The base of a glass balustrade is normally sealed. Failed sealant there lets water collect.
Shower screens
Silicone holds the water in on frameless screens. We reseal without scratching the glass.
Leave it or put it right?
Replacing a conservatory roof is major work. If the leak is a failed sealant joint renewing the joint is the simpler fix. If the roof is the problem, we’ll say so. In an older home around Haroldswick, damp from a failed joint can get into timber and plaster.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Why us?
- We agree the colour with you first
- We never seal over old sealant
- White, clear, grey or coloured to suit, where the product allows
- Fully insured
Read what affects the cost or customer reviews.