Kent · England
Thong Sand Mastic
Sand mastic across Thong and nearby, with old sealant always removed completely and a 12-month guarantee.
- Window mastic to renew ahead of painting
- Weathered mastic on the most exposed windows
- Mastic dropping out of the joint
Can I do it myself?
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Sand mastic in Thong, 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. If you have draughts and rain around sash boxes and mastic that needs renewing before redecorating, we can help.
Outdoor sealant needs dry, clean surfaces, so work on frames around Thong is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
The work is covered for a year after we finish. If anything is not right with it, ring 0345 464 0079 or send us an email.
- Where
- Thong (DA12)
- Region
- Kent
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
We keep the work tidy and contained to the joints we are treating. The job usually takes a few hours for a single window, longer for several. Somewhere like Thong needs a little journey planning: 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.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Before we arrive
- Keep children and pets away from the work area
- Tell us about any water getting in
- On commercial sites, let us know about site rules
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Advice
What sand mastic looks like in Thong
Thong is within about 3 miles 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. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you let a flat or house near Sole Street station, older sash windows in a rental need their mastic kept sound to keep the weather out. If you live in an older home near Church of St Peter and St Paul, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Thong is about 2 miles south-east of Gravesend, in Kent. Wherever you are in the DA12 postcode area, we cover sand mastic for homes and businesses. We cover 922 towns and villages across Kent, from the larger towns to small villages. There’s also a page for London, roughly 22 miles from Thong.
Our applicators cover all of the DA12 postcode area for sand mastic and the streets around it. Neighbouring places we cover for sand mastic include Upper Ifield (1 mile east), Shorne Ridgeway (1 mile east), Shorne (1 mile east), Chalk (1 mile north) and Higham (2 miles east). Within a short drive, we also cover Maidstone (11 miles south-east), Sittingbourne (15 miles east), Dartford (8 miles west), Sevenoaks (13 miles south-west), Northfleet (3 miles north-west) and Swanley (10 miles west).
Landmarks near Thong
In Thong, that means homes and buildings near Shorne Woods Country Park and Thamesview School. The closest station to Thong is Sole Street station, about 2.2 miles south-west of the centre. Well-known places in the area include Rochester Castle (4.5 miles east) and Gravesham Museum (2.6 miles north-west). The countryside around Thong includes Rede Common and Gad's Hill.
Towns and villages near Thong
Also in Thong
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
Signs you need sand mastic in Thong
Timber swells and shrinks with the weather. The movement cracks the mastic little by little.
If you can see any of these, it’s time to have the joints looked at:
- Patchy fillers round a sash window
- Mastic dropping out of the joint
- Draughts and rain around sash boxes
- Mastic worn away on windows facing the weather
Managing a site like Riverview Infant School? Then the mastic around its windows and doors needs looking after like any other building’s.
Before booking anyone
- Whether VAT is included
- How the joint is cleaned and prepared
- What happens if the job turns out different
- Whether all the old sealant comes out first
What sealant work cannot fix
To be straight with you, there are a few things sealant will not fix:
- Sash cords, weights and draught-proofing of the sashes
- Damaged stone surrounds
- Rotten sashes, sills or window boxes (a joiner’s job)
If you are not sure, just ring 0345 464 0079 or email us and we will give you a straight answer before you book.
Joints and surfaces we work on
- Sash and case windows
- Timber door frames
- Tenement windows
- Stone surrounds
- Brick reveals
- Period & listed homes
What happens if it’s left?
Replacing sash windows is a big decision for a period home, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Older cottages and farmhouses around Thong can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Why us?
- Domestic, commercial and hotel work
- 180+ five-star Google reviews
- 12-month guarantee on every job
- More than 20 years in sealant work
Read what affects the cost or what customers say.
Questions from Thong
Does living near the coast affect sand mastic in Thong?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are generally the first to need attention.
Do you cover smaller places like Thong?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is it possible to take out silicone and use sand mastic instead?
Yes, it’s a common request. The old silicone has to come out completely so the mastic can sit properly.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
Can landlords and businesses book you?
Yes, regularly. Several properties can go on one quote, and between tenancies is a good time for the work.
Can I add another job to the visit?
Of course. Combining jobs makes good use of the visit.
How much does sand mastic cost in Thong?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
What’s sand mastic made of?
A traditional pointing material made from sand and a linseed-oil-based binder for the joint between timber frames and masonry.
How the job changes by surface
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. The gap round it is pointed with sand mastic.