Kent · England
Mowshurst Sand Mastic
Professional sand mastic in and around Mowshurst, with old sealant always removed completely and a 12-month guarantee.
- Cracked mastic round a front door frame
- Mastic worn away on windows facing the weather
- Cement or filler used on old window joints that has cracked
Sand mastic in Mowshurst, done properly
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant and we’ll explain which is best for yours. Common call-outs are for old cement repairs round a window that have failed and wind and rain getting in round a sash window, across stone surrounds, period & listed homes and timber door frames.
Mastic can only go onto a dry, clean joint, so window work in Mowshurst is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
All of our work is guaranteed for twelve months, in Mowshurst and everywhere else we cover.
- Where
- Mowshurst (TN8)
- Wider area
- Kent
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Landlords, agents and businesses in Mowshurst
We also work for property managers and facilities teams in Mowshurst and across Kent. We can quote a run of properties together.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Honest limits
To be straight with you, there are a few things sealant will not fix:
- Cracked or broken glass
- Timber that has rotted
- Whether work needs listed building consent
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly.
What we seal
- Tenement windows
- Timber door frames
- Period & listed homes
- Sash and case windows
- Brick reveals
- Stone surrounds
Why it’s worth doing now in Mowshurst
An open joint round the frame lets weather in. Water can get to the frame and the masonry, so dealing with it now protects both. Around Mowshurst, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, 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 Mowshurst
- Old sealant always removed completely
- Arbo and Everbuild products
- Anti-fungal silicone where joints get wet
- Over 20 years’ experience
Common problems we fix in Mowshurst
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows.
People normally contact us after spotting one of these:
- Window mastic to renew ahead of painting
- Draughts and rain around sash boxes
- Weathered mastic on the most exposed windows
- Patchy fillers round a sash window
Letting a property close to Edenbridge station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Questions to ask before booking
- Which colour the sealant will be
- Whether VAT is included
- Who turns up on the day
- Whether they’re fully insured
Keeping the joints in good condition
After the cure time, these simple habits help:
- Ask us before painting near the mastic
- Keep modern sealant off the mastic
- Clear gutters so water does not pour onto the windows
- Get any rot dealt with first
Do not touch or press the mastic while it hardens. It skins over quickly, but takes longer to harden fully.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
The process
There is not much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes a few hours per window, depending on the condition of the joints. For a village or hamlet like Mowshurst, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Let us know about parking restrictions
- Keep children and pets away from the work area
- Clear the area around the work
How to get a quote
To get a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Advice
Common questions in Mowshurst
Will you come out to Mowshurst?
Yes, Mowshurst is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you cover Mowshurst for sand mastic?
Yes, Mowshurst is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
What’s sand mastic made of?
Sand plus a binder based on linseed oil. It’s applied by hand and shaped to suit the surround.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
How long does sand mastic take?
That depends on how much there is to do, but as a guide it takes a few hours per window, depending on the condition of the joints. We will give you a better idea when we quote.
Can you seal over the old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
What does sand mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, call 0345 464 0079 or email us with a short description of the job.
Do you work for letting agents?
Yes, regularly. We can quote for several properties at once, and between tenancies is a good time for the work.
How the job changes by surface
Sash and case windows
Sash windows are where we do most sand mastic work. We renew the mastic round each box.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It gives a traditional finish.
Windows and doors in Mowshurst
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Hever Castle (about 2.3 miles south-east) nearby, there’s older building stock in the area around Mowshurst as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Schools such as Edenbridge Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. In the older streets around Church of St Peter and St Paul, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Mowshurst is about 7 miles north-east of East Grinstead, in Kent. If you need sand mastic in Mowshurst, it’s easy to get a quote: please call 0345 464 0079 or email us. We’re based in Crawley and cover Kent. 922 places in Kent are on our list, from the larger towns to small villages. For nearby work, see our Crawley page.
We work across TN8 for sand mastic. We also cover Marlpit Hill (1 mile west), Edenbridge (1 mile south-west), Pootings (1 mile north), Four Elms (1 mile north-east) and Troy Town (1 mile west). Within a short drive, we also cover Sevenoaks (7 miles north-east), Royal Tunbridge Wells (10 miles south-east), Tonbridge (9 miles east), Swanley (14 miles north), Kings Hill (15 miles east) and Paddock Wood (14 miles east).
What’s near Mowshurst
Around Mowshurst, our work takes us to homes and buildings near The Swan pub and the streets around them. For rail, the closest station is Edenbridge station, roughly 0.6 miles west of the centre. Nearby you’ll also find Haxted Watermill Museum (2.3 miles south-west) and Hever Castle (2.3 miles south-east).