Dundee · Scotland
Window & door mastic in Blackness, Dundee
Window mastic for Blackness, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- White mastic on grey or black frames
- Draughty joints inside around the window
- Hard, cracked sealant around windows
Aftercare tips
To keep the joints looking good and working properly:
- Paint up to the joint, not over it
- Look round the frames every year or so
- Keep paint and stain on wooden frames in good order
- Avoid blasting the frames with a pressure washer
Keep sill grooves and drainage slots clear, so water can run away instead of sitting against the joint.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
Window mastic in Blackness, done properly
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. Our applicators cut it out and replace it with a flexible, weatherproof sealant. Typical jobs include gaps between the frame and the inside reveal and old mastic that has gone black or come away, on window sills, timber windows & doors and uPVC windows.
Sash and case windows are a feature of older tenements in all four Scottish cities, though many have since been replaced. Whether you are in a tenement flat or a house in Blackness, the joint between frame and wall is what keeps the weather out.
We stand behind the work with a 12-month guarantee.
- Place
- Blackness (DD1, DD2, DD3)
- Region
- Dundee
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Leave it or put it right?
Running fresh sealant over the old joint is tempting, but it will not grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. For landlords in Blackness, damp and leaks can be a Repairing Standard issue, so it’s worth fixing failed sealant before a tenant reports it.
What you pay reflects the work, not guesswork. That’s why we ask a few questions first.
What you get with us
- White, clear, grey or another colour, product permitting
- Anti-fungal silicone where joints get wet
- Approved under the ARBOMaster scheme
- Fully insured
Honest limits
A few problems are outside what sealant work can do:
- Damp coming through the wall itself rather than the frame joint
- Broken hinges, locks or handles
- Rotten timber, which needs a joiner first
Not sure which it is? You can send an email to info@mrmastic.co.uk and we will tell you honestly before you book.
Joints and surfaces we work on
- Composite doors
- Timber windows & doors
- Aluminium frames
- Window sills
- uPVC windows
- Patio & French doors
Frames and glazing around Blackness
Blackness is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around window and door frames, especially on the side facing the sea. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
For landlords with property near Dundee station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. Schools such as Dundee School of Architecture are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. Historic houses such as Camperdown House, about 2.5 miles north-west, show how far back building around Blackness goes.
Blackness is about 1 mile south-west of Dundee, in Dundee. From the centre of Blackness to the outskirts, we cover window mastic for every kind of property. Our Dundee coverage runs to 50 places, and Blackness is one of them.
Every address in DD1, DD2 and DD3 is within our area for window mastic. Whether your property is on City Road, Tait's Lane and Lochee Road or a nearby road, we can help. We also cover the places around Blackness: West End (1 mile south), Dundee (1 mile north-east), Stobswell (1 mile north-east), Woodside (2 miles north-east) and Downfield (2 miles north). We also work in nearby towns such as Broughty Ferry (5 miles east), Monifieth (7 miles east), Barnhill (5 miles east), Pitkerro (3 miles north-east), Whitfield (3 miles north-east) and Balgowan (3 miles north). Being one of Dundee’s larger places, Blackness has homes, rented property and businesses of every kind.
Around Blackness
We work in homes and buildings around Cox Branch Library, Dudhope Park and Harris Academy and the streets around them. The nearest railway station is Dundee station, about 0.9 miles east. Well-known places in the area include Dundee Dental Hospital (0.6 miles east) and Tayside Medical History Museum (under half a mile north-east). Not far away are Balgay Hill and Trottick Mill Ponds.
Also in Blackness
How we quote for window mastic
The quote reflects the job in front of us. We take into account:
- Whether old sealant or filler has to be cut out
- Working hours on commercial sites
- How much there is to do
- Access and height
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we will explain what it covers.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
- Whether it has been sealed before
- The type of property
For window mastic in Blackness, drop us a line at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
FAQs for Blackness
Who arranges sealant work on the shared parts of a tenement in Blackness?
Shared parts of a tenement, such as the roof and outside walls, are usually repaired with the agreement of the owners, often through a property factor. The Tenements (Scotland) Act 2004 sets out how that works where the title deeds do not. Windows often belong to the individual flat, but it’s worth checking your deeds.
Do you work for landlords with property near Dundee station?
Yes, landlords and agents are among the people we work for. You can send an email to info@mrmastic.co.uk with the details for a clear quote.
Do you cover Blackness?
Yes. We are based in Crawley and work across South East England, London and Scotland, and that includes Blackness.
Can you get sealant to suit coloured frames?
Yes. We can use white, brown, anthracite grey, black or clear, so the joint suits the frame.
Can new sealant go over the old?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
What do you need from me for a quote?
A short description and the location, with pictures by email if possible. We will ask anything else we need to know.
Can I do 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.
Do the sealants smell?
Possibly a little. Any smell clears as the sealant cures.
What happens on the day
We keep the work tidy and contained to the joints we’re treating. The job usually takes anything from an hour or two to a full day, depending on how many frames there are, and we explain the cure time before we leave. In a Scottish city, a lot of jobs are in tenement flats, up a common stair from a shared close. In Blackness, it helps to know the floor, the door entry arrangements and the nearest parking.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Clear the area around the work
- Let us know if you’ve seen damp or leaks
- Let us know about stairs, lifts or work at height
Getting a quote
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.
Advice
How the job changes by surface
Patio & French doors
Patio and French doors have the longest joints on most houses. Most leaks start at the bottom corners, so we pay close attention there.
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A neat, narrow bead in a colour to match keeps the clean look.
DIY sealant or a professional job?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.