The Mastic Doctor team standing beside their branded vans outside an office building
Kent · England

Mastic sealant contractors in Leybourne

Mastic sealing for building owners, managing agents and housing associations in Leybourne and across Kent. CHAS accredited and fully insured, with a 12-month guarantee.

  • Brittle perimeter mastic across a building
  • A mix of products and colours from past repairs
  • Repeated reactive repairs to the same buildings
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
London, the South East & Scotland
CHAS accredited
£5m public liability

Need mastic sealing in Leybourne?

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Maintenance after handover

Once the work is signed off, these steps help:

  • Share the asbestos register when you send details
  • Start inspections with the most exposed faces
  • Make mastic part of routine maintenance checks
  • List the paperwork your organisation requires when you send details

Protect entrance and corridor joints from knocks where possible. Knocks cause many early failures in communal areas.

Planned resealing is easier to budget than emergency repairs. A programme can start with the worst buildings so spending is spread.

Mastic sealing for commercial buildings in Leybourne

For blocks and buildings in Leybourne and across Kent, the process is the same: you send details, we return a fixed quote, the joints are resealed and the 12-month guarantee follows. Addresses, photos of typical joints and a rough idea of quantities let us give a quick quote or we can visit. If you’re dealing with window mastic that has split and shrunk and mastic failing across several blocks on an estate, we can help, on window and door perimeters on blocks, shopfronts below residential blocks and balcony and threshold joints alike. Most enquiries from Leybourne start with one failed joint and grow into a wider look at the building: we check the joints around it and give you an honest view of what needs doing now and what can wait.

Around smaller places like Leybourne, older walls fitted with newer windows are a familiar sight. The mastic needs to suit an irregular masonry face and the look of the building.

Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.

The Mastic Doctor team beside their liveried vans in front of an office building
Where
Leybourne (ME19, ME20)
Region
Kent
Cover
12 months on our workmanship
Quotes
A fixed quote before we start
Telephone
01277 525 020
Last updated
3 November 2026

Building owners, agents and FMs in Leybourne

Hospitality, education, healthcare, office and retail clients come to us directly as well. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.

Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Leybourne can form part of a wider programme.

Different surfaces, different methods

Window and door perimeters on blocks

Perimeter joints on blocks are best done elevation by elevation or block by block. Access is agreed with you before the quote is fixed.

Communal areas

Entrance doors, screens and corridor junctions in communal areas all have sealant joints. Tidy, sound joints keep them looking cared for.

Questions about Leybourne

Is New Hythe Business Park, near Leybourne, within your area?

Yes, sites like New Hythe Business Park are within our area, along with the rest of Leybourne. A few photographs and the unit address let us price the work.

Is a smaller place like Leybourne outside your area?

No. Small places get the same service as large ones. Our area covers London and the South East counties. Good photos up front let us bring everything on the first visit.

What’s the quickest route to a quote?

The quote form is the simplest route, though you can also phone 01277 525 020 or send details through our quote form. Photos, drawings or a joint schedule help us quote quickly.

Do you do block-wide mastic programmes?

We can. We survey and price each building, then work through them in order, and the programme can start with the worst.

Will you come and look before quoting?

Photos, drawings or a schedule are often enough to quote. Where they aren’t, we arrange a site visit before quoting.

Do you work with property factors and landlords?

Yes. Most of our mastic sealing is for agents, factors, housing associations and portfolio landlords, and we quote building by building or as a programme.

What guarantee do you give on resealing?

There is a 12-month guarantee on our workmanship, backed by public liability insurance.

On site: what to expect

Before we leave any area, we remove the tape, clean down and inspect every joint, ready for your sign-off. If an area should be left alone while the sealant cures, we say how long and put signs out. Smaller jobs around Leybourne can be grouped with others nearby, which keeps travel down. You will have a fixed quote before work starts.

  1. Each block or building is walked and the failed joints recorded with the likely cause.
  2. We send a fixed quote that sets out the joints, the products and the programme.
  3. The programme is fixed with you, including dates you can pass on to residents or tenants.
  4. Old sealant is stripped and each face prepared back to firm material.
  5. Backing rod and primer go in as the joint requires, then the new bead is placed and tooled.
  6. Each building is checked on completion and the work carries our 12-month guarantee.

Getting the site ready

  • Send your site hours and access windows
  • Warn occupants and staff about the work
  • Let us know about inductions and permits

Getting a fixed quote

For a fixed quote, ring 01277 525 020 or email us with the site address and an outline of the work. You can also send details through our quote form.

Ask for a quote

Related advice

Looking after buildings in and around Leybourne

Leybourne is in the South East, one of the UK’s drier regions. Outside mastic still needs a dry joint and the right temperature, while the elevations that take the most sun tend to show hardened mastic first. Leybourne lies roughly 26 miles out from central London. Managed blocks of flats are a big part of commuter-belt property, and window and balcony mastic on them tends to age at the same rate.

If you look after a block within reach of West Malling station, which lies south-west of Leybourne, frame and balcony mastic can be renewed on one programme. For a school such as Lunsford Primary School, perimeter mastic on windows and doors is a holiday job.

Leybourne is about 5 miles north-west of Maidstone, in Kent. Commercial clients in Leybourne can call on us for mastic joints, as part of our coverage of Kent. 931 places across Kent fall within our area, Leybourne among them. Sites around London have their own page, about 26 miles away.

We cover the ME19 and ME20 postcode districts for mastic joints. If your site is on London Road, Oxley Shaw Lane and Redbank or close by, send details and we’ll quote for mastic joints. If your building is just outside Leybourne, we cover Larkfield (1 mile east), Lunsford (1 mile north-east), New Hythe (1 mile north-east), Birling (1 mile north-west) and Snodland (2 miles north). Nearby towns on our patch include Maidstone (5 miles south-east), Sittingbourne (14 miles east), Dartford (13 miles north-west), Sevenoaks (10 miles west), Royal Tunbridge Wells (13 miles south-west) and Gravesend (9 miles north).

Landmarks near Leybourne

Recent enquiries here include premises near The Malling School, Leybourne Lakes Country Park and The Malling School. For rail, the closest station is West Malling station, roughly 0.7 miles south-west of the centre. Well-known places in the area include Leybourne Castle (less than half a mile north-west) and Coldrum Long Barrow (2.7 miles north-west). The countryside around Leybourne includes Burham Down and Blue Bell Hill.

Map of Leybourne © OpenStreetMap contributors

What we’re called out for in Leybourne

Poor preparation explains many failed joints. Without clean, sound faces and a primer where the product needs one it comes away from one face.

Common reasons buildings call us in:

  • Mastic failing across several blocks on an estate
  • Movement joints with sealant missing
  • Old repairs sealed over failed mastic
  • Worn sealant at communal door frames

For owners of several units at places like New Hythe Business Park (1.4 miles north-east of Leybourne), one programme can deal with frame and external mastic across the lot.

Comparing quotes

  • How the joint faces will be prepared and primed
  • How joint depth will be controlled
  • Which product they’ll use, and why it suits the joint
  • Will failed sealant be removed rather than covered?

Questions to ask before you appoint anyone

What sets the cost

We price every job individually. The things that drive the figure:

  • Joint width, depth and condition
  • The site’s rules and procedures
  • Access and working height
  • Quantities, in metres or numbers

Every site prices differently: joint size, product, access and site hours all play a part. Send the details and a fixed figure follows.

What we need to price the job

It doesn’t need to be a full survey. A few details are enough to get going:

  • The type of building and who uses it
  • How the joints are reached, and at what height
  • Any dates the work must fit around
  • Whether an asbestos survey exists

Let us know the site, the scope and your timescale, and we’ll put a fixed quote together. The easiest way is to give us a call on 01277 525 020 or email the details over.

Accreditations

Trusted. Accredited. Insured.