Kent · England
Dungeness Sand Mastic
Specialist sand mastic for Dungeness: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Window mastic to renew ahead of painting
- Old sand mastic that has cracked, crumbled or fallen out
- Failed mastic on an exposed elevation
Sand mastic in Dungeness
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s made from sand and a linseed-oil-based binder and built up by hand. On older homes, it suits the building far better than silicone. We work on tenement windows, sash and case windows and timber door frames, and people most often call us about draughts and rain around sash boxes and mastic round period door frames that has failed.
In a village or hamlet like Dungeness, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
We stand behind the work with a 12-month guarantee.
- Place
- Dungeness (TN29)
- Region
- Kent
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What sand mastic looks like in Dungeness
Dungeness is within about 1 mile of 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. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For jobs in and around Dungeness, choosing the right material for each joint is as important as a tidy finish.
Dungeness is about 11 miles south-west of Hythe, in Kent. Dungeness gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Kent coverage runs to 922 places, Dungeness among them. For nearby work, see our Brighton page, about 49 miles away.
Every address in TN29 is within our area for sand mastic, from the main roads to the quietest streets. That includes homes and businesses on Dungeness Road and Reactoe One Road and the roads around them. We also cover Lydd-on-Sea (2 miles north), Greatstone-on-Sea (4 miles north), Lydd (4 miles north-west), Littlestone-on-Sea (4 miles north) and New Romney (5 miles north). Further out, we also cover Folkestone (14 miles north-east), Hythe (11 miles north-east), Cheriton (14 miles north-east), South Willesborough (15 miles north), Dymchurch (8 miles north) and Willesborough (15 miles north).
Landmarks near Dungeness
In Dungeness, that means homes and buildings near Britannia Inn and the streets around them. Well-known places in the area include Lydd Town Museum (3.7 miles north-west). For a walk, there’s RSPB Dungeness and Burnthouse Pen.
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Crumbling stone or brickwork round the window
- Putty and glazing repairs
- Whether work needs listed building consent
If you are not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer.
Surfaces we seal
- Tenement windows
- Period & listed homes
- Brick reveals
- Stone surrounds
- Sash and case windows
- Timber door frames
Quotes for sand mastic in Dungeness
Jobs vary more than people expect. The main factors:
- The number of rooms or windows
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
- Access and height
What it costs depends on the amount of work, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
What to tell us for a quote
You do not need to know the technical terms. Just tell us:
- A few photos by email, if you can
- Whether it has been sealed before
- What the problem is, such as mould, gaps, leaks or cracking
- Any access issues, like height or stairs
If you are in Dungeness and need sand mastic, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Landlords, agents and businesses in Dungeness
For anyone letting property in or around Dungeness, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
How the job changes by surface
Brick reveals
Gaps between frame and brick let in rain and draughts. Renewing the mastic closes it.
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.
Towns and villages near Dungeness
What else we do in Dungeness
The process
There is not much for you to do on the day. Show us the job and we will take it from there. The job generally takes a few hours per window, depending on the condition of the joints. For a village or hamlet like Dungeness, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Clear items away from the joints we’re working on
- Try not to wet indoor joints just before the visit
- Plan for the work area to be out of bounds to pets and children
Getting a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or drop us an email.
Read more
Common problems we fix in Dungeness
Shallow joints are a common cause. A thin layer does not hold well, which is why we pack deep voids first and get the depth right.
Signs it’s time to call us include:
- Cement or filler used on old window joints that has cracked
- Wind and rain getting in round a sash window
- Cracked mastic round a front door frame
- A silicone bead on a sash window that spoils the look
In and around Dungeness, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Questions to ask before booking
- How long the guarantee is
- Whether you can choose the colour
- Is the old sealant removed completely?
- How the surfaces are prepared before sealing
What happens if it’s left?
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in and new mastic seals them. In a small place like Dungeness, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Why choose Mr Mastic in Dungeness
- We’re fully insured
- Rated 4.9 stars on Google
- Homes, businesses and hotels
- Old sealant always removed completely
Read what affects the cost or our reviews.
Dungeness: your questions answered
Is Dungeness within the area you cover?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Does living near the coast affect sand mastic in Dungeness?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Is it possible to paint over sand mastic?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
Do you guarantee sand mastic work?
There’s a 12-month guarantee on every job.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Can tenants book the work?
We are happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
Are you fully insured?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.