Shetland Islands · Scotland
Haroldswick Remedial Sealant
Removing failed, mouldy or leaking sealant and putting it right for homes and businesses in Haroldswick and across the Shetland Islands. Fully insured, ARBOMaster approved and guaranteed for a year.
- Over-sealed joints coming away
- A shower that leaks however often it’s resealed
- Decorators’ caulk around a bath or shower
What happens if it’s left?
Stripping out botched sealant adds time to a reseal, but not by much: it takes a few hours for a typical bath or shower, longer where several layers have been applied. Compared with chasing the same leak every few months, it’s time well spent. 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.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why Haroldswick clients choose us
- 12-month guarantee on every job
- A sealant colour to suit the surroundings
- Trusted Arbo and Everbuild sealants
- We agree the colour with you first
Read our cost guide and our reviews.
How we handle remedial sealant in Haroldswick
If a joint has been resealed and is leaking again, it’s worth a proper look. It helps to have photos when you drop us a line at info@mrmastic.co.uk, along with when it was last resealed. Common call-outs are for black mould underneath the bead and a shower that leaks however often it’s resealed, on failed movement joints, shrunken worktop sealant and mouldy bath & shower sealant.
Bathrooms in smaller places like Haroldswick work just as hard as those in the cities. Limescale is less of a problem with Scotland’s generally soft water, but mould still takes hold in damp sealant and grout.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Location
- Haroldswick (ZE2)
- Wider area
- Shetland Islands
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What affects the quote in Haroldswick
For a quick quote, just ask. The main things that affect it are:
- Any mould that needs treating
- The type of sealant required
- How many rooms, windows or areas are involved
- Any working-time requirements on site
Leaving a failed joint generally makes the job bigger, not smaller. If you’re not sure whether it needs doing, send an email to info@mrmastic.co.uk for an honest opinion and a quote.
What we need to know
What to tell us when you ask for a quote:
- Whether it has been sealed before
- A few photos by email, if you can
- What’s wrong with the joints now
- Access, such as stairs, a lift or height
To get a quote, drop us a line at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. You’ll have a clear quote before we start.
What we cannot put right
We’d rather tell you now than do work that will not last, so these are the limits:
- Sealant in an older building that needs testing for asbestos first
- A bath, tray or worktop that moves until it’s properly fixed
- Tiles that have come away from the wall
If you are not sure, just drop us a line at info@mrmastic.co.uk and we’ll give you a straight answer before booking.
Surfaces we seal
- Leaking tray & enclosure joints
- Shrunken worktop sealant
- Mouldy bath & shower sealant
- Failed movement joints
- Botched or over-sealed joints
- Expansion joints
Remedial sealant in Haroldswick: local notes
Haroldswick is within about 2 miles of the coast. Near the coast, holiday lets and guest houses can see bathrooms used by one guest after another, and sealant and grout that work that hard wear out sooner. In Scotland, private landlords have to meet the Repairing Standard, which covers keeping fixtures and fittings in a reasonable state of repair. Tired, leaking sealant is worth putting right before a new tenant moves in.
In and around Haroldswick, as anywhere, good remedial sealant starts with a clean, dry, properly prepared joint.
Haroldswick is in the Shetland Islands. For remedial sealant in and around Haroldswick, it’s easy to get a quote: please email us at info@mrmastic.co.uk. We cover the Shetland Islands from our Crawley base, Haroldswick included. Haroldswick is one of 63 places in the Shetland Islands we cover.
Postcode districts we cover here for remedial sealant: ZE2. Whether your property is on Taftens, Nordabrake and Brakefield Crescent or anywhere close by, our applicators can take on the job. With the B9087 close by, Haroldswick is simple for us to get to. If you’re just outside Haroldswick, we cover Baltasound (3 miles south-west), Clivocast (8 miles south), Cullivoe (9 miles south-west), Houbie (14 miles south) and Camb (15 miles south-west). For island and remote addresses, a little more planning is needed.
Landmarks near Haroldswick
Well-known places in the area include Unst Heritage Centre (0.6 miles south-west). Open spaces near Haroldswick include Little Heog and Loomer Shun.
How it works
On the day, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before any work begins. The work generally takes a few hours for most joints, depending on how much old sealant has to come out. For a place like Haroldswick, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- We look at how the sealant has failed and check for movement or a leak path.
- Every layer of old sealant is cut and cleaned out.
- The joint is cleaned, treated for mould and left to dry.
- Moving joints get backing and a flexible sealant to suit.
- We tool the joint and tell you about anything else that needs attention.
Before we arrive
- Mention if the joints have been sealed before
- Plan for the work area to be out of bounds to pets and children
- Mention any leaks or damp you’ve noticed
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Related advice
For landlords and businesses
We work for landlords and letting agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can go on one quote.
More services for Haroldswick
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Do you need remedial sealant in Haroldswick?
Silicone only bonds to surfaces that are clean and dry. Residue, moisture or dust left in the joint weaken the bond, so it starts lifting sooner than it should.
Most people get in touch after spotting one of these:
- A shower that leaks however often it’s resealed
- Smears and lumps from a botched reseal
- Dark patches showing through the sealant
- Caulk or the wrong sealant used in a wet area
If you live in an older home near St John's Church, walls and floors in older homes can move, and sealant and grout show it first.
Before booking anyone
- Who does the work, and how experienced they are
- Whether all the old sealant comes out first
- Whether you can choose the colour
- What product goes in the joint
Common questions in Haroldswick
Will you come out to Haroldswick?
Yes, we do. We work across all of Scotland, islands included, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you cover Haroldswick for remedial sealant?
Yes. Our work covers the whole of Scotland, and Haroldswick is part of that. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing.
Can failed expansion joints be resealed?
Yes. We cut out the failed sealant, fit backing and reseal with a flexible product.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Can you remove sealant that’s been put over old sealant?
Yes. Stripping layered sealant takes longer than a normal reseal, but it’s the only way the new joint will last.
Is there any odour?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
How long will it take to strip and reseal the joint?
It takes a few hours for most joints, depending on how much old sealant has to come out. You will know the timing when we quote.
How much does remedial sealant cost in Haroldswick?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.