Aberdeenshire · Scotland
Johnshaven Sand Mastic
Sand mastic for Johnshaven, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Window mastic to renew ahead of painting
- Crumbling sand mastic round a window
- Modern sealant on a period surround
When it is not the sealant
It helps to know what we can’t do:
- Masonry that needs repairing
- Putty and glazing repairs
- Rotten sashes, sills or window boxes (a joiner’s job)
If you are not sure, just send an email to info@mrmastic.co.uk and we’ll give you a straight answer.
Surfaces we seal
- Tenement windows
- Period & listed homes
- Timber door frames
- Stone surrounds
- Brick reveals
- Sash and case windows
Sand mastic in Johnshaven
We renew sand mastic around sash windows and doors in stone and brick. Out comes the old, loose mastic, and new mastic is applied and shaped by hand. We work on tenement windows, timber door frames and brick reveals, and common reasons people get in touch are old cement repairs round a window that have failed and gaps round a timber door in stone or brick.
Many older Scottish homes still have timber windows set into stone walls. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Location
- Johnshaven (DD10)
- Region
- Aberdeenshire
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Do you need sand mastic in Johnshaven?
Age is the main cause. Sand mastic is a maintenance item like any pointing, depending on exposure and upkeep.
The problems people generally mention when they call include:
- Wind and rain getting in round a sash window
- Cement or filler used on old window joints that has cracked
- Modern sealant on a period surround
- Tired mastic found when preparing windows for paint
Whether the job is in Johnshaven itself or nearby, the right material for each joint matters as much as a neat finish.
Questions to ask before booking
- When the joint can take water or movement
- Who turns up on the day
- Whether they seal over old material or remove it
- What preparation is included
The process
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours for a single window, longer for several. For a place like Johnshaven, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Let us know if you’ve seen damp or leaks
- Keep children and pets away from the work area
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Read more
For landlords and businesses
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Housing providers, facilities teams and property managers book us too in Johnshaven and across Aberdeenshire. Several sites can go on one quote.
Frames and glazing around Johnshaven
Johnshaven is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
Around Johnshaven, as everywhere, sand mastic is only as good as the preparation behind it.
Johnshaven is about 8 miles north-east of Montrose, in Aberdeenshire. Jobs in Johnshaven get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 161 places across Aberdeenshire, from the larger towns to small villages. Our Aberdeen page covers work nearby (26 miles or so).
Jobs for sand mastic in DD10 works the same way as everywhere else we cover. That includes homes and businesses on Square, Main Street and Mid Street and the roads around them. Close by, we work in Gourdon (3 miles north-east), St Cyrus (3 miles south-west), Inverbervie (4 miles north-east), Arbuthnott (5 miles north) and Laurencekirk (6 miles north-west). Larger places within reach include Montrose (8 miles south-west), Stonehaven (13 miles north), Hillside (6 miles south-west) and Ferryden (8 miles south-west).
What’s near Johnshaven
Nearby you’ll also find Benholm Castle (2.1 miles north). The countryside around Johnshaven includes St Cyrus National Nature Reserve.
Your questions about sand mastic in Johnshaven
Does living near the coast affect sand mastic in Johnshaven?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
Can you do sand mastic in Johnshaven?
Yes, Johnshaven is within the area we cover. Our work covers the whole of Scotland. You can send an email to info@mrmastic.co.uk and let us know what needs doing.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you don’t need to watch us work.
Are you fully insured?
Yes. We are fully insured for domestic and commercial work.
Should I use sand mastic or silicone?
Sand mastic usually suits period timber windows best. On modern frames, we’d normally use a flexible sealant.
What guarantee comes with the work?
Every job comes with our 12-month guarantee.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Do you offer different sealant colours?
We help you choose a colour that suits, from white and clear to greys and other shades. The choice depends on the product the joint needs.
Should I try it myself first?
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.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What affects the cost of sand mastic
For a quick quote, just ask. The main things that affect it are:
- Any working-time requirements on site
- The number of rooms or windows
- The size of the job
- Access and height
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first.
What to tell us for a quote
Photos help, but a description is a good start. Try to tell us:
- How we’d reach the joints
- Whether it has been sealed before
- Pictures of the joints, sent by email
- Where the job is, and your postcode
For a quote, email us at info@mrmastic.co.uk with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
How to look after the new joints
After the cure time, these simple habits help:
- Ask us before painting near the mastic
- Inspect the joints round the windows every year or so
- Keep sills and gutters clear so water drains away
- Ask the planning authority about consent for listed or conservation-area homes
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look before trying a quick fix.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens.