Kent · England

Sand Mastic in Sittingbourne

Sand mastic across Sittingbourne and nearby, with every bit of old sealant taken out first and a 12-month guarantee.

  • Cement or filler used on old window joints that has cracked
  • Mastic worn away on windows facing the weather
  • Open joints round the window box

Book sand mastic in Sittingbourne

For landlords and businesses

In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.

Letting agents and landlords in Sittingbourne can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.

Sand mastic in Sittingbourne

We work across Sittingbourne renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand for a neat, traditional finish. We’re often asked to deal with mastic dropping out of the joint and a silicone bead on a sash window that spoils the look, across tenement windows, brick reveals and period & listed homes.

In a town like Sittingbourne, older houses sit alongside newer estates, with windows of every age. All of them depend on a sound bead of mastic between frame and wall.

Every job is covered by our 12-month guarantee.

Location
Sittingbourne (ME10, ME9)
Region
Kent
Guarantee
12 months on all our work
Quote
Quoted before any work starts
Telephone
0345 464 0079
Last updated
26 October 2026
Mr Mastic applicator sealing the top of a white uPVC door frame on a red-brick house

Sand mastic in Sittingbourne: local notes

Sittingbourne is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around older windows and doors, especially on the side facing the sea. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.

If you live in an older home near Church of the Holy Trinity, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you look after a building such as Borden Grammar School, its window and door frames need their mastic kept sound, just like a home’s. Rented homes near Sittingbourne station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.

Sittingbourne is about 37 miles east of London, in Kent. We carry out sand mastic for homeowners, landlords and businesses in Sittingbourne and the surrounding area, as part of our work across Kent. We cover 922 towns and villages across Kent. For nearby work, see our Chelmsford page (29 miles or so).

We cover every part of the ME10 and ME9 postcode area for sand mastic and the streets around it. Sand mastic is available to properties on High Street, Roman Square and Moonstone Square. Being close to the A2 and A249, Sittingbourne is easy for our applicators to reach for sand mastic. We also cover the places around Sittingbourne: Murston (1 mile east), Milton Regis (1 mile north-east), Kemsley (1 mile north), Howt Green (1 mile north-west) and Heart's Delight (1 mile south-west). Within a short drive, we also cover Maidstone (10 miles south-west), Ashford (15 miles south), Whitstable (13 miles east), Faversham (7 miles east), Minster (6 miles north-east) and Kings Hill (15 miles west). As one of the bigger places in Kent, Sittingbourne has every kind of property, from flats to offices.

Landmarks near Sittingbourne

In Sittingbourne, that means homes and buildings near Milton Court Primary Academy, The Golden Hope pub and Milton Creek Country Park, among other places. Sittingbourne has its own railway station: Sittingbourne station. A little further out are Bayford Court (less than half a mile east) and Court Hall Museum (under half a mile north).

Map of Sittingbourne © OpenStreetMap contributors

Should I try it myself first?

If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.

Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.

Surface by surface

Period and listed homes

Period homes look their best with traditional materials.

Timber door frames

Door frames get knocked and soaked, so their mastic can fail sooner. We rake it out and renew it.

Looking after it afterwards

To keep the joints looking good and working properly:

  • Inspect the joints round the windows every year or so
  • Don’t run silicone over sand mastic
  • Find out about consent before window work on a listed home
  • Clear gutters so water doesn’t pour onto the windows

Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.

It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.

Sittingbourne: your questions answered

Is sand mastic in a coastal place like Sittingbourne any different?

Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.

Do you work for landlords with property near Sittingbourne station?

Yes. We work for landlords and agents as well as homeowners. You can phone 0345 464 0079 or email us with the details for a clear quote.

Are you fully insured?

Yes. Mr Mastic is fully insured.

What guarantee comes with the work?

All our work has a one-year guarantee, and we’re fully insured.

Can I paint the new mastic?

It’s traditionally left unpainted, which is what traditional guidance recommends. Ask us before decorating.

Do you work for hotels and businesses?

Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.

Is it messy?

Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.

Can you replace silicone on a period window with sand mastic?

Often, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.

Quotes for sand mastic in Sittingbourne

Some jobs are bigger than they look, and some smaller. The main factors:

  • The size of the job
  • Working hours on commercial sites
  • The number of rooms or windows
  • The old material and how stubborn it is

Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.

What we need to know

A few details help us give you an accurate quote. When you get in contact, it helps to mention:

  • The type of property
  • Any previous sealing or DIY work
  • Access, such as stairs, a lift or height
  • Where the job is, and your postcode

Want a quote for sand mastic? Please call 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.

What sealant work cannot fix

Sealant is not the answer to every problem, and we will tell you before any work starts. It won’t solve:

  • Masonry that needs repairing
  • Cracked or broken glass
  • Planning or listed building consent (your local planning authority decides)

If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.

Joints and surfaces we work on

  • Timber door frames
  • Tenement windows
  • Period & listed homes
  • Stone surrounds
  • Sash and case windows
  • Brick reveals

How it works

There isn’t 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 for a single window, longer for several from start to finish. For a job in Sittingbourne, we need access to where the work is and somewhere nearby to park. For outside work, let us know about side access, gates and any upper-floor joints.

  1. First we agree which joints need doing.
  2. Old mastic and any loose material are raked out.
  3. We pack any deep voids first.
  4. The sand mastic is mixed and pressed into the joint by hand.
  5. We dress the finish so it sits neatly against the masonry.

Getting ready for the visit

  • Clear the area around the work
  • Mention any leaks or damp you’ve noticed
  • Keep pets and children clear of the area while we work

Getting a quote

For a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.

Get a price

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ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job