Kent · England
New-build mastic & snagging in Hextable, Kent
Plot mastic for developers and snagging failed sealant in new homes for homeowners, landlords and businesses in Hextable. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Untidy sealant flagged on a snagging list
- Cracked sealant around new window and door frames
- Skirting joints opening in the first winter
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Keep pictures and emails about snagging items
- Ventilate bathrooms well, especially in the first year
- Avoid scourers and strong chemicals on sealant
- Resist patching a failed seal with a tube from the DIY shop
Wipe the sealant with warm soapy water. Avoid abrasive pads and strong solvents, which can damage the surface.
Mould takes hold quickly in sealant that has gaps or lifted edges. Resealing before mould gets in keeps the job straightforward.
About our new build mastic in Hextable
If your new home has a leaking shower seal, open skirting joints or untidy sealant, we can help. While the builder’s snagging or warranty period runs, report it to them first. If you have shower seals failing in the first year or two and second-fix sealing on new plots, we can put it right, on show homes, windows & doors and plot handovers alike.
Homes around Hextable range from older cottages to newer houses, and their floors range just as widely, each moving in its own way. Skirting and threshold joints need a sealant that suits the floor.
We stand behind the work with a one-year guarantee, so you are not left on your own once the job is done.
- Place
- Hextable (BR8, DA2)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for new build mastic
We do not publish a price list, because no two jobs are the same. The quote depends on:
- The type of sealant required
- Any working-time requirements on site
- How many rooms, windows or areas are involved
- Any mould that needs treating
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, phone 0345 464 0079 or drop us an email for an honest opinion and a quote.
Asking for a quote
You do not need to know the technical terms. It helps if you can tell us:
- Whether it’s a home or a business
- Where the job is, and your postcode
- How we’d reach the joints
- Any previous sealing or DIY work
Want a quote for new build mastic? Please phone 0345 464 0079 or email us and tell us about the job. We will explain what we’d do and send you a clear quote before work begins.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
For landlords and businesses
We also work for property managers and facilities teams. Several sites can go on one quote, and we’re fully insured.
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
What happens if it’s left?
For developers, getting the sealant right first time saves return visits. Every return visit for a failed seal takes time, and they’re avoidable with good preparation. Homes in smaller places like Hextable can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email.
Why choose Mr Mastic in Hextable
- Any old sealant cut out fully, not covered over
- 4.9 on Google from 180+ five-star reviews
- Every job guaranteed for a year
- Full insurance on every job
Take a look at what affects the cost or what customers say.
Common problems we fix in Hextable
The first winter with the heating on dries a new home quickly. Skirting, frames and worktops pull away slightly and cracks appear in the sealant.
Signs it’s time to call us include:
- New-build shower sealant that has already split
- Gaps opening as the house dries out and settles
- Sealant that never bonded to the surface
- Untidy sealant flagged on a snagging list
Around Hextable, as everywhere, new build mastic is only as good as the preparation behind it.
What to look for in a quote
- What the cure time is
- Who turns up on the day
- Whether they seal over old material or remove it
- Whether VAT is included
The process
We bring everything the job needs with us, so there’s nothing for you to buy. Once we have agreed what’s being done, we protect the area and start. It normally takes a few hours in a single home. For a job in Hextable, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- Joints are dried and primed where the product calls for it.
- 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.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- On commercial sites, let us know about site rules
- Clear the area around the work
Ask for 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 add pictures by email if you can.
Read more
Questions from Hextable
Can you help a landlord with a rental near Swanley station?
Yes, we work for landlords and agents. Just call 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear quote.
Is Hextable in your area for new build mastic?
Yes. We work across London and the South East, and Hextable is part of that. You can call 0345 464 0079 or email us and let us know what needs doing, and we will send you a clear quote.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status, and we’re fully insured.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Can you work from my snagging list?
Yes. Snagging lists are a common starting point for us. We agree the sealant items with you before work begins.
Where is Mr Mastic based?
We work from Crawley. We cover Hextable and the rest of Kent, along with the rest of our area.
Can you match the sealant colour to my new kitchen or bathroom?
White and clear are the most common, but sealant comes in other colours too. We choose one to suit the room before we begin.
Places near Hextable
Also in Hextable
Joints and finishes in Hextable homes
The South East is one of 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 Swanley station, the sealant around baths, showers and frames is worth checking in the first year or two.
Hextable is about 3 miles south-west of Dartford, in Kent. From the centre of Hextable to the outskirts, we cover new build mastic for every kind of property, from flats and houses to offices and hotels. We cover 922 towns and villages across Kent, large and small. London is on our list too, around 13 miles away.
Every address in BR8 and DA2 is within our area for new build mastic. We cover properties on Panter's, Southbank and Plantation Road. Main roads around Hextable include the B258, so getting to you is simple. If you’re just outside Hextable, we cover Puddledock (1 mile north-west), Swanley Village (1 mile south-east), Stonehill Green (1 mile west), Joyden's Wood (1 mile north-west) and Wilmington (1 mile north). Within a short drive, we also cover Dartford (3 miles north-east), Sevenoaks (9 miles south), Gravesend (9 miles east), Tonbridge (15 miles south), Northfleet (7 miles east) and Kings Hill (14 miles south-east).
Landmarks near Hextable
Around Hextable, our work takes us to homes and buildings near The Ship pub, Dartford Heath and Hextable School, among other places. For rail, the closest station is Swanley station, roughly 1.5 miles south-west of the centre. A little further out are Broadway Shopping Centre (3.4 miles north-west) and Dartford Library (2.6 miles north-east). The countryside around Hextable includes Wansunt Pit.