Kent · England
New-build mastic & snagging in Clement Street, Kent
Plot mastic for developers and snagging failed sealant in new homes in Clement Street, with a 12-month guarantee on every job. Ask us for a quote.
- Gaps opening as the house dries out and settles
- Shower seals failing in the first year or two
- Untidy sealant flagged on a snagging list
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
New build mastic in Clement Street
Our new-build work comes in two parts: plot mastic for developers, and putting right failed sealant for people who’ve bought a new home. Both get the same care over preparation, because that’s what rushed new-build sealant normally lacks. We work on skirting & floors, show homes and windows & doors, and the jobs we see most are sealant that never bonded to the surface and joints pulling apart as timber shrinks.
For a small place like Clement Street, the journey and access are planned in advance, and once on site, the job is the same as anywhere.
You get a one-year guarantee, the same in Clement Street as everywhere else we work.
- Place
- Clement Street (BR8)
- Wider area
- Kent
- Cover
- A year, on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Clement Street: your questions answered
Do you cover Clement Street for new build mastic?
Yes, Clement Street is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Do you cover smaller places like Clement Street?
Yes, Clement Street is covered. Our work covers 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 take on second-fix sealing for builders?
Yes. Second-fix sealing in bathrooms, kitchens, frames and floors is part of what we do. Good preparation keeps snagging to a minimum.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. Then phone 0345 464 0079 or drop us an email.
Is it normal for sealant to crack in a new home?
New homes dry out and move in their first couple of years, and sealant is often rushed onto dusty, unprimed surfaces. Either can make it fail early.
Where is Mr Mastic based?
We are based in Crawley, West Sussex, and we work across South East England, London and Scotland.
How long will you be here?
It depends on the size of the job, but most jobs take a few hours in a single home. We will give you a better idea when we quote.
Is it worth resealing while the house is still settling?
For failed seals that let water through, the best time is now. For small cosmetic gaps, waiting until the house has settled can save doing them twice.
How the visit works
On the day, we look over the joints with you first. Surfaces next to the work are protected before any work begins. Most jobs take anything from a few hours to several days, depending on the number of plots. In a small place like Clement Street, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- Every bit of the old builder’s sealant is cut out down to clean surfaces.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- We tool every joint neatly and tell you when each area can be used.
Preparing for the visit
- Clear items away from the joints we’re working on
- Plan for the work area to be out of bounds to pets and children
- Mention any tricky access
Get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or send us an email.
Advice
Different surfaces, different methods
Bathrooms and en suites
Shower trays in new homes often move slightly in the first year. The joint is stripped back before the new bead goes in and baths are filled before sealing.
Kitchens
Sink joints are wet all the time. A kitchen sealant goes in there, food-safe where it’s needed.
Why act early in Clement Street
It often makes sense to do all the sealant items on a snagging list together. It’s one visit, one quote and one set of cure times for the lot. In a small place like Clement Street, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Why us?
- ARBOMaster approved applicator
- Over 20 years’ experience
- 12-month guarantee on every job
- Old sealant always removed completely
What new build mastic looks like in Clement Street
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you’ve bought a new home near Farningham Road station, the sealant around baths, showers and frames is worth checking in the first year or two. In and around Clement Street, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Clement Street is about 2 miles south of Dartford, in Kent. Every kind of property in Clement Street can book us for new build mastic. The work is guaranteed for a year. Across Kent, we cover 922 places, and Clement Street is one of them. For nearby work, see our London page (14 miles or so).
Here we cover the BR8 postcode area for new build mastic. Neighbouring places we cover for new build mastic include Hawley (1 mile north-east), Sutton at Hone (1 mile east), South Darenth (2 miles south-east), Darenth (2 miles east) and St Margarets (2 miles east). Further out, we also cover Sevenoaks (9 miles south), Gravesend (7 miles east), Tonbridge (15 miles south), Northfleet (6 miles east), Kings Hill (13 miles south-east) and Swanscombe (4 miles north-east).
Landmarks near Clement Street
Around Clement Street, our work takes us to homes and buildings near Dartford Heath, Wilmington Academy and The Plough pub. Clement Street’s nearest station is Farningham Road station, roughly 1.3 miles south-east of the centre. A little further out are Eynsford Castle (3 miles south) and West Hill Hospital (2.2 miles north). Green spaces nearby include Wansunt Pit.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Also near Clement Street
Other services in Clement Street
When something else is needed
A few problems are outside what sealant work can do:
- Damaged fittings that need replacing
- Your warranty claim itself, which is between you and the builder
- A tray or bath that isn’t properly supported, until it’s fixed
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- Show homes
- Skirting & floors
- Kitchens
- Bathrooms & en suites
- Plot handovers
- Windows & doors
How we quote for new build mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The product the joint needs
- When we can work, for business premises
- How much old sealant there is and how hard it is to remove
- The size of the job
The cost depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- The type of property
- Roughly how big the job is
- Where the job is, and your postcode
- What the problem is, such as mould, gaps, leaks or cracking
Asking for a quote is easy: let us know the job and the location 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.