Dundee · Scotland
External Mastic in Tealing
Professional external mastic in and around Tealing, with every bit of old sealant taken out first and a one-year guarantee.
- Movement joints with cracked, split or missing sealant
- Panel joints letting water in
- Joints pointed up with cement by mistake
Can I do it myself?
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, and the work is guaranteed for a year.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
How we handle external mastic in Tealing
A movement joint is a deliberate break that lets a wall expand and contract. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. Typical jobs include movement joints filled with mortar instead of sealant and moss and dirt in joints with no sealant left, across render & cladding joints, façade panels and copings & trims.
External sealant needs dry surfaces, so outdoor work around Tealing is planned around the weather, and longer journeys are planned in advance. Tell us how to reach each wall, gutter and roofline.
A one-year guarantee comes as standard, so you are not left on your own once the job is done.
- Location
- Tealing (DD4)
- Wider area
- Dundee
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Common problems we fix in Tealing
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
Common reasons people contact us include:
- Failed sealant between panels on a façade
- Hard, crazed mastic that has stopped moving
- Gaps where render, brick and frames meet
- Joints with sealant missing in places
If you live in an older home near Tealing Parish Church And Churchyard, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
What your quote should include
- How the surfaces are prepared before sealing
- What the quote includes, VAT included or not
- What the cure time is
- What guarantee comes with the work
What happens on the day
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours for a handful of joints, longer for a whole elevation and we leave things clean and tidy. Around Tealing, distance and access matter more than parking. Let us know how to find you and how to reach the joints.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Tell us if parking is tricky
- Try not to wet indoor joints just before the visit
Getting a quote
For external mastic in Tealing, drop us a line at info@mrmastic.co.uk. Tell us what the problem is and where, and we’ll agree the price before any work begins.
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What sealant work cannot fix
New sealant cannot fix everything, and we’d rather say so up front. It won’t solve:
- Rising or penetrating damp from elsewhere in the wall
- Cracked brickwork or render that needs a builder or plasterer
- Walls that need new movement joints cut into them
If in doubt, email us at info@mrmastic.co.uk and we’ll say what we think.
Joints and surfaces we work on
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Concrete & block
- Joints between brick and frames
- Copings & trims
Towns and villages near Tealing
Also in Tealing
What affects the cost of external mastic
There’s no set price list, because no two jobs are the same. What we look at:
- Whether old sealant or filler has to be cut out
- Mould in or behind the old joints
- The size of the job
- The number of rooms or windows
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please email us at info@mrmastic.co.uk and we’ll talk you through it.
Asking for a quote
There’s no need for technical detail. Just tell us:
- How we’d reach the joints
- Where the property is
- What’s wrong with the joints now
- Pictures of the joints, sent by email
Asking for a quote is easy: let us know what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand, and we’ll take it from there.
Common questions in Tealing
Is Tealing in your area for external mastic?
Yes, Tealing is within the area we cover. We work across all of Scotland. Just send an email to info@mrmastic.co.uk with a few details of the job.
What guarantee comes with external mastic in Tealing?
Every job comes with our one-year guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and you will get one quote.
Do you take out the old sealant first?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
I rent my home. Can I book you?
Yes. Check with your landlord; we can send the quote to them too.
What is backing rod for?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What’s an expansion joint in brickwork?
Brickwork, render and cladding all move a little, and planned joints take up that movement. The gap is sealed with a flexible sealant over backing rod.
Walls and rooflines in Tealing
Dundee sits on the north bank of the Tay, and much of its older housing is sandstone tenements. Plenty of Scottish homes have harled walls, and joints where harling meets other materials need a sealant that can grip and flex.
In and around Tealing, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Tealing is about 4 miles north of Dundee, in Dundee. From the centre of Tealing to the outskirts, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Tealing is one of 50 towns and villages in Dundee where we work.
Postcode districts we cover here for external mastic: DD4. If you are just outside Tealing, we cover Inveraldie (1 mile south-east), Barns of Claverhouse (2 miles south), Strathmartine (3 miles south-west), Bridgefoot (3 miles south-west) and Claverhouse (3 miles south). We also work in nearby towns such as Dundee (4 miles south), Broughty Ferry (6 miles south-east), Stobswell (5 miles south), Monifieth (6 miles south-east), Blackness (5 miles south) and Barnhill (6 miles south-east).
What’s near Tealing
Nearby you will also find Powrie Castle (2.7 miles south) and Maryfield Hospital (4.2 miles south). For a walk, there’s Trottick Mill Ponds and Gallow Hill.
Landlord and commercial work in Tealing
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
Leave it or put it right?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water behind a failed seal does the most damage when nobody’s watching.
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. We will send you a clear quote for the lot.
Why choose Mr Mastic in Tealing
- More than 20 years in sealant work
- Sanitary silicone with an anti-fungal additive in wet areas
- Experience in homes, commercial sites and hotels
- Trusted Arbo and Everbuild sealants