Kent · England
New Build Mastic in Deal
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Deal and across Kent. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps behind new kitchen upstands
- Untidy sealant flagged on a snagging list
- Joints pulling apart as timber shrinks
New build mastic for homes and businesses in Deal
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 and if that stalls, we can do it. Typical jobs include cracked sealant around new window and door frames and gaps opening as the house dries out and settles, on windows & doors, kitchens and plot handovers.
Small business units and shops in a town like Deal have floors that take heavy wear. Joints at thresholds and in tiled or concrete floors need resealing before the edges start to break up.
We stand behind the work with a 12-month guarantee, so you’re covered after we have gone.
- Location
- Deal (CT14)
- Region
- Kent
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Aftercare tips
Looking after new joints is easy:
- Clean sealant with mild detergent, not abrasives
- Look at the sealant regularly in the first couple of years
- Keep pictures and emails about snagging items
- Do not wait for the house to settle if water is getting through
Watch the joints as the house settles. Small gaps can appear as the house dries, and they’re simple to reseal once movement has slowed.
Lifting sealant traps moisture and mould behind it. Dealing with it before it goes black keeps the job straightforward.
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll quote.
What we do, step by step
There’s no need to move everything out, just the space around the work. We protect the rest, and the work takes anything from a few hours to several days, depending on the number of plots for a typical job. For a job in Deal, 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.
- Each joint is checked for movement before we start.
- We remove the failed sealant and clean the joints.
- Joints are dried and primed where the product calls for it.
- Baths are filled with water, then the new sealant is applied.
- The finished joints are checked and the cure times given.
Getting ready for the visit
- Let us know about parking restrictions
- Where the joints are inside, avoid wetting them before we arrive
- Keep pets and children clear of the area while we work
Get a quote
For new build mastic in Deal, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Advice
Joints and finishes in Deal homes
Deal is close to the coast. New homes near the sea put their outside mastic to work from day one, so it’s worth checking at snagging. 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.
In and around Deal, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Deal is about 14 miles east of Canterbury, in Kent. Every kind of property in Deal can book us for new build mastic. The work is guaranteed for a year. We cover 922 towns and villages across Kent. Chelmsford is on our list too, around 53 miles away.
Jobs for new build mastic in CT14 works the same way as everywhere else we cover. Whether your property is on London Road, Forelands Square and Herschell Square or anywhere close by, our applicators can take on the job. Main roads around Deal include the A258 and B2056. If you’re just outside Deal, we cover Mill Hill (1 mile west), Walmer (1 mile south), Sholden (1 mile north-west), Sholden Meadows (1 mile north-west) and Great Mongeham (1 mile west). Further out, we also cover Canterbury (14 miles west), Margate (11 miles north), Dover (7 miles south-west), Folkestone (13 miles south-west), Ramsgate (8 miles north) and Broadstairs (10 miles north).
Around Deal
Around Deal, our work takes us to homes and buildings near Betteshanger Park, Brickmakers Arms and Deal Parochial Church of England Primary School. For rail, the closest station is Deal station, about 0.5 miles north-east. Nearby you will also find Kent Museum of the Moving Image (0.6 miles north-east) and Deal Castle (0.5 miles east).
What we cannot put right
Sealant is not the answer to every problem, and we’d rather say so up front. It will not solve:
- A tray or bath that isn’t properly supported, until it’s fixed
- Leaking fittings rather than failed sealant
- Damaged fittings that need replacing
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before you book.
Joints and surfaces we work on
- Plot handovers
- Show homes
- Skirting & floors
- Bathrooms & en suites
- Windows & doors
- Kitchens
Different surfaces, different methods
Plot handovers
Good preparation at handover saves snagging later. We clean out building dust before sealing and primer used where needed.
Skirting and floors
Wet-area floor joints need a flexible seal. They get a flexible, water-resistant sealant.
Why it’s worth doing now in Deal
Small cosmetic gaps can wait for the house to settle, but a leaking seal can’t. Not sure whether yours can wait? You can call 0345 464 0079 or drop us an email with a few pictures and we will tell you. Black mould and gaps in sealant do not fix themselves, and in a busy home in Deal they get worse with every use. Now is the easy time to put it right.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we’ll explain the quote if you ask.
Why choose Mr Mastic in Deal
- Experience in homes, commercial sites and hotels
- ARBOMaster approved applicator
- White, clear, grey or coloured to suit, where the product allows
- Tidy, careful work
Read our cost guide or our reviews.
Your questions about new build mastic in Deal
Do you cover Deal for new build mastic?
Yes, Deal is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
I let a flat near Deal station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
What does new build mastic cost?
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. You’ll get a clear quote before any work starts.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can I add another job to the visit?
Yes. Just list everything you need and you will get one quote.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before resealing.
Also in Deal
Common problems we fix in Deal
On many sites, sealant goes on in the final rush before handover. Joints are not always cleaned of dust or primed, and the sealant sits on grit instead of the surface.
Keep an eye out for any of the following:
- Cracked sealant around new window and door frames
- New-build shower sealant that has already split
- Untidy sealant flagged on a snagging list
- Beads laid onto grit and dust from the build
If you’ve bought a new home near Deal station, the sealant around baths, showers and frames is worth checking in the first year or two.
What to look for in a quote
- How the colour is chosen
- Which sealant they’ll use, and why
- Whether they seal over old material or remove it
- What the cure time is