Kent · England
Highsted Sand Mastic
Specialist sand mastic for Highsted: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Gaps where the frame meets the masonry
- Tired mastic found when preparing windows for paint
- Modern sealant on a period surround
About our sand mastic in Highsted
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant, and we’ll talk through which suits your home. We are often asked to deal with open joints round the window box and crumbling sand mastic round a window, across sash and case windows, tenement windows and period & listed homes.
Homes in small places like Highsted often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Highsted (ME9)
- Region
- Kent
- Cover
- One year on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
Good habits help new joints last longer. Our tips:
- Avoid patching sand mastic with silicone
- Do not paint over the new mastic
- Find out about consent before window work on a listed home
- Make sure water runs off the sill
Do not run silicone over the new mastic. If you see a crack, ask us to take a look before trying a quick fix.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
Landlord and commercial work in Highsted
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
Common questions in Highsted
Do you work for landlords with property near Sittingbourne station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Will you come out to Highsted?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Can I choose the sealant colour?
Generally, yes. White, clear and grey are common, and other colours are available for many products, and we agree the colour with you before we start.
Do the sealants smell?
That depends on the sealant. Some smell for a while, some hardly at all.
How long will you be here?
A typical job takes a few hours per window, depending on the condition of the joints, including the preparation. Your quote will say how long we expect yours to take.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
Is the work guaranteed?
You get our one-year guarantee to all our work.
DIY sealant or a professional job?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Why it’s worth doing now in Highsted
Filling over old, loose mastic doesn’t last. We remove the loose material first so the new mastic stays put. Where a wall is exposed, as many are in small places like Highsted, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or drop us an email.
Why Highsted clients choose us
- Domestic, commercial and hotel work
- An ARBOMaster approved applicator
- A 12-month guarantee on all work
- Fully insured
Take a look at what affects the cost or customer reviews.
How it works
We keep the work tidy and contained to the area we’re working on. Expect the work to take a few hours for a single window, longer for several, and we tell you how long to leave it before we go. For a village or hamlet like Highsted, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- 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 are working on
- Mention if the joints have been sealed before
- Mention any sign-in or site rules at work premises
How to get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that is easy.
Read more
How we quote for sand mastic
For a quick quote, just ask. What matters most is:
- How easy the joints are to reach
- The size of the job
- Mould in or behind the old joints
- How many areas need sealing
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
When you call or email, it’s useful to know:
- Access, such as stairs, a lift or height
- Pictures of the joints, sent by email
- Where the property is
- Whether it’s a home or a business
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we will talk you through the work before giving you a price.
Also near Highsted
What else we do in Highsted
What sand mastic looks like in Highsted
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as Church of St Nicholas, the joint between an old wall and a newer frame is generally the first place rain gets in. If you look after a building such as Rodmersham School, its window and door frames need their mastic kept sound, just like a home’s.
Highsted is about 2 miles south of Sittingbourne, in Kent. Every kind of property in Highsted can book us for sand mastic. Every job comes with our one-year guarantee. Highsted is one of 922 towns and villages in Kent we cover for sand mastic. We also work in Chelmsford, about 31 miles from Highsted.
Every address in ME9 is covered for sand mastic. Local streets include Stockers Hill and Highsted Road, and we cover them all. We also cover the places around Highsted: Rodmersham Green (1 mile east), Rodmersham (1 mile east), Tunstall (1 mile west), Bapchild (1 mile east) and Dungate (1 mile south). Within a short drive, we also cover Maidstone (10 miles west), Ashford (13 miles south-east), Canterbury (15 miles east), Whitstable (13 miles east), Faversham (6 miles east) and Minster (7 miles north).
Landmarks near Highsted
Around Highsted, our work takes us to homes and buildings near Fulston Manor School and Cromers Wood and the streets around them. The closest station to Highsted is Sittingbourne station, roughly 1.6 miles north. Nearby you will also find Sittingbourne Heritage Museum (1.4 miles north) and Bayford Court (1.7 miles north).
What we’re called out for in Highsted
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint.
Look out for any of the following:
- Cement or filler used on old window joints that has cracked
- Window mastic to renew ahead of painting
- Draughty sash windows at the surround
- Failed mastic on an exposed elevation
For landlords with property near Sittingbourne station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Before booking anyone
- What happens if they find a problem under the old sealant
- Are they insured?
- When the joint can take water or movement
- What guarantee comes with the work