Argyll and Bute · Scotland
Remedial sealant & repairs in Kilmun, Argyll and Bute
Our applicators work in Kilmun on removing failed, mouldy or leaking sealant and putting it right. Old material cut out, joints cleaned and sealed neatly.
- A shower that leaks however often it’s resealed
- Sealant peeling off a dusty or damp surface
- Smears and lumps from a botched reseal
Why deal with it now?
Mould under a bead can’t be reached by cleaning. The layers have to come out, and the joint treated and dried before resealing. Around Kilmun, water from a failed joint in an older stone home can soak into timber and plaster.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Why choose Mr Mastic in Kilmun
- Colour picked to suit the job
- Full insurance on every job
- You choose the colour before work begins
- Any old sealant cut out fully, not covered over
See our cost guide or what customers say.
How we handle remedial sealant in Kilmun
Movement and expansion joints fail when the sealant cannot stretch. The old sealant comes out and backing goes in to control the depth, then a flexible sealant matched to the movement goes in. If you have leaks that keep coming back after resealing and decorators’ caulk around a bath or shower, we can help.
Across smaller places in Scotland, homes range from stone and harled cottages to newer houses. Where a building moves, cracked grout and split sealant are usually the first signs.
Each job carries a 12-month guarantee, large or small.
- Place
- Kilmun (PA23)
- Region
- Argyll and Bute
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
How to look after the new joints
Joint life depends on how it’s used and looked after. We suggest:
- Keep an eye on the ceiling below the bathroom
- Keep the room well ventilated
- Ask why a joint failed before redoing it
- Keep movement joints clear of mortar and paint
Watch the joint over the first few weeks, especially if movement was the problem. Should anything change, drop us a line at info@mrmastic.co.uk.
Signs to act on: peeling layers, mould showing through the bead, leaks after showering or cracks in a movement joint. Any of them means it’s time for remedial work.
What remedial sealant looks like in Kilmun
Kilmun is close to 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. Scottish Water supplies are generally soft, so limescale is less of a problem than in hard-water areas. Mould is another matter: a bathroom that stays damp still turns sealant and grout black.
Managing a site like Dunoon Grammar School? Then washroom and kitchen sealant there needs the same care as at home, and schools and businesses are part of our work as well as homes. Homes close to St Munn's Parish Church include some older properties, and bathrooms in older houses have often been refitted more than once, with sealant laid over sealant.
Kilmun is about 7 miles north-west of Greenock, in Argyll and Bute. Kilmun gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Argyll and Bute coverage runs to 118 places, Kilmun among them. Glasgow is on our list too, about 28 miles from Kilmun.
Here we cover the PA23 postcode area for remedial sealant. If you need remedial sealant at a property on Midge Lane, Shore Road and Graham's Point or anywhere close by, our applicators can take on the job. You will find Kilmun on the A880, so it’s easy for us to get to with everything needed for remedial sealant. We also cover the places around Kilmun: Tom nan Ragh (1 mile west), Sandbank (1 mile south), Strone (2 miles south-east), Hunters Quay (3 miles south-east) and Kirn (3 miles south-east). We also work in nearby towns such as Helensburgh (8 miles east), Rothesay (12 miles south), Rhu (7 miles east), Garelochhead (7 miles north-east), Port Bannatyne (11 miles south-west) and Innellan (7 miles south). For island and remote addresses, a little more planning is needed, so mention it when you ask for a quote.
Local landmarks in Kilmun
Nearby you will also find Castle House Museum (3.5 miles south) and Cowal Community Hospital (2.6 miles south). Green spaces nearby include Loch Loskin and Clach Bheinn.
How it works
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours for a typical bath or shower, longer where several layers have been applied. Around Kilmun, distance and access matter more than parking. Tell us how to find the property and how to reach the work.
- First we find out how and where the joint has failed.
- All the old sealant comes out, including any layers underneath.
- 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
- Move anything stored near the joints
- Keep pets and children clear of the area while we work
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, drop us a line at info@mrmastic.co.uk.
Related advice
Places near Kilmun
What else we do in Kilmun
What the job involves on each surface
Worktops & kitchens
Old kitchen sealant pulls back from the wall over time. We strip it, degrease the joint and reseal colour-matched to the worktop.
Movement & expansion joints
Movement joints in floors, walls and façades need a flexible sealant set to the right depth. We remove the failed sealant, fit backing and reseal with a low-modulus product.
Kilmun questions
Is there a guarantee on remedial sealant in Kilmun?
All our work, in Kilmun and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Will you come out to Kilmun?
Yes, smaller places are covered as well as towns. We work across all of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Where do you work from?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
Can I do it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
How long does the work take?
A little longer than a standard reseal. Most jobs take a few hours, and we confirm the time with your quote.
Will it make a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Landlord and commercial work in Kilmun
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Honest limits
We’d rather tell you now than do work that won’t last, so these are the limits:
- Movement from fittings that aren’t supported
- Plumbing leaks behind walls or under trays
- Old mastic in a building from before 2000 that should be checked for asbestos before it’s disturbed
If you’re not sure, just drop us a line at info@mrmastic.co.uk and we’ll give you a straight answer.
Where we work in Kilmun
- Expansion joints
- Shrunken worktop sealant
- Botched or over-sealed joints
- Failed movement joints
- Leaking tray & enclosure joints
- Mouldy bath & shower sealant