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

Greatness commercial sealant contractors

Commercial sealant contractors for Greatness, from a contractor working since 2005. Fully insured and CHAS accredited.

  • Untidy joints in a reception, shop floor or lobby
  • Frame mastic that has hardened and come away from the wall
  • Leaks that seem to come through a sealant line
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
Constructionline member
Fully insured: £5m PL

Commercial sealant contractors in Greatness

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

Your questions answered

Will you take on work at estates like Bat & Ball Enterprise Centre, close to Greatness?

Yes. Our area takes in Greatness and its surroundings, with estates and business parks such as Bat & Ball Enterprise Centre included. Photos and a short description are enough for a first look.

Does a hotel in Greatness need to shut while its sealant is renewed?

In most cases no closure is needed: we work room by room or floor by floor. Tell us your quiet periods and access windows and we will plan around them.

Is it fine to apply new sealant on top of old?

No. Failed sealant is removed and the faces cleaned back to sound, dry material first, since fresh sealant will not bond reliably to aged material.

Will your applicators have CSCS cards?

Yes. Our applicators hold CSCS cards.

Is your work guaranteed?

The work is guaranteed for 12 months. Should a joint we sealed give trouble during those 12 months, let us know and we’ll look at it.

How do you choose the sealant?

A specification, where there is one, decides it. If there isn’t one, it comes down to the joint: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.

When is resealing likely to be due?

Nobody can honestly give a figure in years, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular checks let you plan resealing before leaks or damage.

How we handle commercial sealant contractors in Greatness

If you look after more than one building, a single sealant contractor saves a lot of chasing. Single jobs, multi-site packages and planned programmes all come to us, handled with the same process each time: details in, a fixed quote back, the sealing done, then our 12-month guarantee. For sites in Greatness, the quickest start is to call 01277 525 020 or email the details over with a list of addresses. Site teams most often ask us about messy, uneven beads from earlier work that let the building down and earlier reseals applied straight onto the failed bead, across floor and threshold joints, window and door perimeters and movement joints in walls and floors. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Greatness, that means joint design, primers and backing rod as standard.

The most common commercial job in Greatness is resealing joints that have simply reached the end of their life: split, chalky or peeling, with leaks or mould starting behind it.

In a smaller place such as Greatness, commercial buildings are typically a mix of shops, a pub or café, a school, a surgery and perhaps a few business units. Each job is modest, yet a joint in a small café needs the same cutting out, cleaning and sealing as one in a city office.

A 12-month guarantee applies to all our work in Kent. If an installation problem shows up, call the office on 01277 525 020 or send photos by email and we will arrange a return visit.

The Mastic Doctor team beside their liveried vans in front of an office building
Where
Greatness (TN13, TN14, TN15)
Wider area
Kent
Guarantee
12 months on our workmanship
Quotes
A fixed quote before we start
Phone
01277 525 020
Page updated
3 November 2026

Maintenance after handover

Cleaning and maintenance staff play a part too. Pass these on to them:

  • Act on the first lifting edges rather than waiting
  • Respect the cure time before reopening an area
  • Brief cleaning contractors to avoid scourers and blades on sealant
  • Add sealant to the planned maintenance inspection list

In washrooms and kitchens, extraction makes a real difference to sealant life. Fans that are broken or switched off leave joints damp for longer, and mould follows damp. Your maintenance team can look at extract fans at the same time.

Sealant rarely fails all at once across a building. The first failures are often a warning about the rest, so it makes sense to look at the wider elevation or block. We’ll tell you which sealant joints need doing first and which can wait.

Shops, offices and hotels in and around Greatness

Greatness lies roughly 19 miles out from central London. Business parks and retail centres are common around the capital’s motorway corridors. Multi-site occupiers here often want one sealant contractor across all their buildings. The area within 2 miles of Greatness holds a number of hotels. In hotels, sealant shows everywhere, from bathroom joints to reception counters, so colour and a clean finish matter; work is planned so the hotel keeps trading.

For tenants and agents on sites such as Bat & Ball Enterprise Centre, which lies north-west of Greatness, office fit-outs, reception joints and window perimeters are the usual sealant work. Offices and shops close to stations such as Bat & Ball station, under half a mile to the west of Greatness, tend to be busy all day, so sealant work is planned around opening hours.

Greatness is about 1 mile north-east of Sevenoaks, in Kent. Greatness sits inside our coverage and the rest of Kent, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. 931 places across Kent fall within our area, including Greatness. We also cover London, some 19 miles away.

If you need commercial sealant contractors in TN13, TN14 and TN15, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. Streets here include Seal Road, Mill Lane and Sandy Lane, and sites on any of them can send details for a fixed quote. Just outside Greatness, we also work in Seal (1 mile east), Godden Green (2 miles south-east), Styants Bottom (3 miles east), Bitchet Green (3 miles south-east) and Stone Street (3 miles south-east). Bigger towns within reach include Maidstone (14 miles east), Dartford (11 miles north), Royal Tunbridge Wells (11 miles south), Gravesend (12 miles north-east), Tonbridge (7 miles south-east) and Northfleet (12 miles north-east).

Around Greatness

Locally, jobs take us to sites close to The Old Bat and Ball pub, Wildernesse School and Knole Academy and the streets around them. Greatness has its own railway station: Bat & Ball station. Other landmarks nearby include Sevenoaks Museum (1.3 miles south) and Kemsing Castle Bank (1.7 miles north-east). For a walk, there’s Dryhill Nature Reserve.

Map of Greatness © OpenStreetMap contributors

Surface by surface

Window and door perimeters

Internally, window boards and frame edges often have decorators’ caulk or silicone that has cracked. We use a paintable product where decorating follows and a silicone where it doesn’t.

Fire-rated seals where specified

Where the specification calls for fire-rated or intumescent sealant around service penetrations or linear gaps, we install it to the product’s tested detail. The design and sign-off of fire stopping belong to the designer and building control.

Commercial clients in Greatness

Building owners and managing agents use us on everything from one building to a spread of sites. One quote can cover more than one site, which keeps the paperwork simple.

When you manage a building on behalf of an owner, clear figures and clear communication matter. You get a fixed quote, an agreed scope and a walk round at the end.

How a job runs

We bring the products specified for the job, along with primers and backing rod. Joint faces are cleaned back to sound, dry surfaces, primer goes on where the manufacturer specifies it, and each bead is tooled to a neat concave finish. Work in places the size of Greatness is planned as a single visit where we can. Photos with rough sizes let us arrive with everything needed.

  1. Send details through our quote form, or ask for a site visit.
  2. The cause is diagnosed and the scope priced as a fixed quote.
  3. Where parts of the building must stay open, the work is phased.
  4. Every failed bead is removed rather than covered.
  5. Each joint gets a suitable sealant, laid to depth and tooled.
  6. We check the work with you, and the 12-month guarantee starts.

Before we start on site

  • Share your working hours and any access restrictions
  • Tell us what induction or permit system the site runs
  • Move anything stored against the joints

Quotes

Send us photographs, drawings or a joint schedule and a fixed quote comes back to you. If the job needs a look first, we will arrange a site visit.

Get a quick quote

Read more

When to call us in Greatness

If only one face has lost its grip, that’s an adhesion failure. The usual causes are poor preparation, a missed primer, contamination on the joint face or sealant bonded to the base of the joint. We see it often where joints were sealed in a hurry.

What tends to prompt an enquiry:

  • Earlier reseals applied straight onto the failed bead
  • Sanitary sealant that has gone black and patchy
  • Window and door perimeter joints that have cracked open
  • External beads that have gone brittle and cracked

Sites a few miles apart, such as Bat & Ball Enterprise Centre and Sevenoaks Business Centre, can share one programme and one point of contact.

What to look for in a quote

  • Will RAMS and insurance details be available?
  • Health and safety accreditation such as CHAS
  • How long is the guarantee, and what does it include?
  • What level of public liability insurance do they hold?

How to choose a sealant contractor

Quoting for work in Greatness

Your fixed quote is built from the real scope. It takes account of:

  • Which sealant the job calls for
  • Backing rod, priming and other preparation
  • How much there is to seal
  • Access and working height

Access often affects the price as much as the sealing: joints within easy reach take less time than ones that need access equipment. Mention the access as part of your enquiry.

Before you send an enquiry

A few photos plus some basic facts will normally do. Please tell us:

  • The product your specification calls for
  • Approximate linear metres or a joint schedule
  • Your programme or deadline
  • Clear photographs of the problem areas

To get a fixed quote, call 01277 525 020 or email drawings and photos, telling us the site location and the nature of the job. You can also send details through our quote form.

Accreditations

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