Kent · England
Key's Green New Build Mastic
New build mastic for Key's Green and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Cracks appearing as a new home settles
- Messy sealant that spoils new finishes
- Gaps between new skirting and floors
New build mastic for homes and businesses in Key's Green
Building dust is behind a lot of failed new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the sealant actually sticks rather than sitting on a layer of grit. We work on bathrooms & en suites, kitchens and show homes, and common reasons people get in touch are internal frame sealant that has split and new-build shower sealant that has already split.
For a small place like Key's Green, the journey and access are planned in advance, and the work itself is the same as on any site.
Your job is guaranteed for a year, as with all our work.
- Where
- Key's Green (TN12)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Landlords, agents and businesses in Key's Green
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
How the visit works
Once we’re on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take anything from a few hours to several days, depending on the number of plots. In a small place like Key's Green, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Mention if the joints have been sealed before
- Keep children and pets away from the work area
- Mention any leaks or damp you’ve noticed
Getting a quote
For new build mastic in Key's Green, phone 0345 464 0079 or email us. Tell us what the problem is and where, and we will agree the price before any work begins.
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Key's Green: your questions answered
Do you cover smaller places like Key's Green?
Yes, Key's Green 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.
Can you do new build mastic in Key's Green?
Yes. Our work covers London and the South East, and Key's Green is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
Do the sealants smell?
Sometimes, a little. It fades as the sealant cures.
Is the work guaranteed?
Yes, for a year. If there’s a problem with our work in that time, tell us and we will put it right.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Where are you based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Can you do plot mastic on a new development?
Yes. We seal plots to the developer’s programme. Tell us the plots and the joints involved and we’ll quote.
Can tenants book the work?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
When to call us in Key's Green
New homes are full of moisture from plaster, screed and concrete, which takes a year or two to dry out. Drying timber shrinks and pulls joints apart and the sealant has to cope with the movement.
Signs it’s time to call us include:
- Sealant applied over dusty or wet surfaces
- Frame joints opening as the plaster dries
- Untidy sealant flagged on a snagging list
- Gaps opening as the house dries out and settles
Around Key's Green, as everywhere, new build mastic is only as good as the preparation behind it.
What your quote should include
- Is the old sealant removed completely?
- How the colour is chosen
- How long to leave it before use
- What the quote includes, VAT included or not
New build mastic in Key's Green: local notes
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you’ve bought a new home near Frant station, the sealant around baths, showers and frames is worth checking in the first year or two.
Key's Green is about 4 miles east of Royal Tunbridge Wells, in Kent. From the centre of Key's Green to the outskirts, we cover new build mastic for every kind of property, from flats and houses to offices and hotels. Key's Green is one of 922 places in Kent where we work for new build mastic. You can also see our page for Crawley, about 24 miles away.
We work across the TN12 postcode area for new build mastic and the streets around it. If you need new build mastic at a property on Cryals Road and Beech Lane or anywhere close by, our applicators can take on the job. If you are just outside Key's Green, we cover Lamberhurst Quarter (1 mile south), Petteridge (1 mile north-east), Pembury (2 miles north-west), Matfield (2 miles north-east) and Brenchley (2 miles north-east). Within a short drive, we also cover Maidstone (12 miles north-east), Sevenoaks (13 miles north-west), Royal Tunbridge Wells (4 miles west), Tonbridge (6 miles north-west), Kings Hill (10 miles north) and Foley Park (13 miles north-east).
Landmarks near Key's Green
In Key's Green, that means homes and buildings near Brenchley Wood and The Blue Boys Inn, among other places. Key's Green’s nearest station is Frant station, about 3.5 miles south-west. A little further out are Pembury Hospital (2.4 miles north-west) and Old Scotney Castle (3.7 miles south-east). For a walk, there’s Bewl Water and Tudeley Woods RSPB reserve.
Different surfaces, different methods
Skirting and floors
Where the floor meets a bath panel or kitchen plinth, the joint keeps mop water out. They get a flexible, water-resistant sealant.
Windows and doors
Internal joints between frames and plaster often crack as a new house dries. We cut out the cracked bead and reseal with a flexible sealant that suits the frame.
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Keep photos and emails about snagging items
- Look at the sealant regularly in the first couple of years
- Do not seal over failed sealant yourself
- Open a window or run the fan after bathing
Clean the sealant with a mild detergent and a soft cloth. Avoid abrasive pads and strong solvents.
Leave a failed new-build seal and water can reach the floor and the ceiling below. Catching it early keeps the fix to the sealant.
Towns and villages near Key's Green
Also in Key's Green
What affects the quote in Key's Green
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The old material and how stubborn it is
- How easy the joints are to reach
- The number and length of the joints
- The type of sealant required
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Helping us quote
To help us quote quickly, let us know:
- The problem you’ve noticed
- Pictures of the joints, sent by email
- If someone has resealed it before
- How we’d reach the joints
Getting a quote is simple: let us know what needs doing and where and its rough size. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Leave it or put it right?
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it will not bond to the old layer. A lasting seal starts with removing the old one completely. Around Key's Green, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
The cost depends on the amount of work, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
Why Key's Green customers choose us
- Colour agreed with you before work begins
- Over 20 years’ experience
- Colour picked to suit the job
- 4.9 on Google from 180+ five-star reviews
Take a look at how sealant jobs are priced and customer reviews.