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

Lenham commercial sealant contractors

We carry out sealant work for offices, shops, hotels and other commercial buildings in Lenham. Send details for a fixed quote.

  • A top-up bead over failed sealant, now lifting
  • Water staining near frames, panels or ceilings
  • Sanitary sealant that has gone black and patchy
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
CHAS accredited
Fully insured: £5m PL

Commercial sealant contractors for businesses in Lenham

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

What sealant work can’t fix

We seal joints; we don’t mend everything behind them. On its own, sealant can’t deal with:

  • Water from a services leak rather than a joint
  • Broken glass or blown double-glazed units
  • Roof leaks that only look like a joint problem

Not sure which it is? You can call 01277 525 020 or email a schedule or drawings and we’ll tell you honestly before you book.

Surfaces we seal

  • Washrooms and tea points
  • Window and door perimeters
  • External facade joints
  • Floor and threshold joints
  • Movement joints in walls and floors
  • Kitchen worktops and splashbacks

Commercial sealant contractors in Lenham

Commercial occupiers rarely want a floor out of action for sealant work. Work is scheduled around the site hours and access windows you give us. That applies whether the building is an office, a shop, a hotel, a college or a care home. If you’re dealing with shrunken sealant along kitchen worktops and splashbacks and wall and floor joints that have lost their seal, we can help, whatever the surface. Looking for mastic applicators who cover Lenham? Mastic Doctor has worked for contractors, FMs and building owners since 2005, CHAS accredited and a Constructionline member.

Occupied buildings in Lenham need the work phased: washrooms in turn, floors in sections and entrances kept open.

Sealant jobs for businesses in a place the size of Lenham are often best grouped: shopfront, washroom, kitchen and any external joints done together. That keeps travel and disruption down.

Every job we finish is backed by a 12-month workmanship guarantee, in Lenham as everywhere else we work. If our installation lets you down in that time, we return and fix it.

Where
Lenham (ME17)
Wider area
Kent
Cover
12 months on our workmanship
Quote
Quoted before any work starts
Telephone
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Cost factors for sealant joints

Each job is priced on its own details. The main factors are:

  • Working within restricted access windows
  • Distance, for remote addresses
  • Specialist products, such as fire-rated or hygienic sealants
  • Any access equipment needed

Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a quote and we’ll explain how it’s made up.

What to include in your enquiry

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

  • Your programme or deadline
  • Drawings or a marked-up plan, if available
  • Photos of the joints, close up and from further back
  • The asbestos register, for older buildings

For a fixed quote, speak to us on 01277 525 020 or use the quote form with the site address and an outline of the work. Our quote form is another easy route.

How a job runs

Before we leave any area, the masking comes off, the area is cleaned and every joint is checked, ready for your sign-off. Where the sealant needs time to cure before use, we tell you and sign the area. Work in places the size of Lenham is planned as a single visit where we can. Clear photographs and measurements help us bring the right products.

  1. You send photos, drawings or a list of the joints and areas involved, or we arrange a site visit.
  2. Next comes a diagnosis and a fixed quote.
  3. Before anything is cut out, we agree access, timings and sequence.
  4. Failed sealant is cut out and each joint cleaned back to sound, dry faces.
  5. We fit backing to the right depth, prime where specified and lay the new bead.
  6. Each area is inspected, signed off and backed by our 12-month guarantee.

Before we start on site

  • Let building users know which areas are affected
  • Make sure the joints can be reached
  • Agree which areas must stay open

Getting a fixed quote

A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we’ll fill any gaps with a visit.

Get a price

Related advice

Looking after the joints

After handover, these steps help:

  • On pre-2000 buildings, share the asbestos information before work starts
  • Have extract fans checked so wet areas dry out
  • Brief cleaning contractors to avoid scourers and blades on sealant
  • Respect the cure time before reopening an area

Good ventilation keeps wet-area sealant in better condition. Fans that are broken or switched off leave joints damp for longer, and mould follows damp. It’s worth having fans checked while the sealant is fresh.

Movement joints that fill with debris stop working. With nothing soft to close against, the materials either side take the load and start to break up. At that point it’s a repair job rather than a reseal.

Site staff or a sealant specialist?

Site maintenance staff can often handle a short internal joint. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

Some joints are best left to specialists: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.

Questions about Lenham

Can you match sealant colours for premises in Lenham?

Yes. Colour matching to frames, cladding, stone and shop-fit finishes is a regular part of the work. Send colour references or photos and we’ll confirm what’s available for the product.

Do you cover business parks and estates near Lenham, such as Roebuck Business Park?

Yes. We cover Lenham and the area around it, including industrial estates, business parks and retail parks such as Roebuck Business Park. Photos and a short description are enough for a first look.

Is it OK to apply fresh sealant over existing beads?

Every scrap of failed sealant is removed before the new bead goes on. A bead laid on old silicone peels away, so it isn’t something we do.

How do you choose the sealant?

Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.

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.

Are you CHAS accredited?

Yes. We’re CHAS accredited and a Constructionline member.

Will the building have to shut during the work?

It’s normal for us to work in occupied buildings. Only the area being sealed is closed, and the sequence is agreed in advance for as long as the cure needs.

What happens if it’s left?

It can be tempting to hold sealant work back until the next refurbishment. That’s reasonable for internal joints that are just tired-looking, but a joint letting water in now keeps doing damage until the refurb arrives. We can seal the urgent joints now and leave the rest for the programme. For buildings in places like Lenham, one well-planned visit beats several small ones, so we’d suggest renewing all the joints that are going, not just the worst.

What a job costs comes down to how many linear metres there are, how much old material needs removing and how the joints are reached. Call for a fixed quote once you have the details.

Why us?

  • CHAS accredited contractor
  • Constructionline member for supplier checks
  • Sealing commercial buildings since 2005
  • 12-month guarantee on workmanship

See how commercial sealant jobs are priced and our accreditations.

Commercial premises in Lenham

Lenham sits in one of the drier corners of the country, the South East. External joints still need dry faces and the right temperature, and damp or frosty mornings can hold work up. Central London is about 39 miles from Lenham. This part of the South East is dense with business parks and out-of-town offices. If you have premises across the region, one contractor can cover them all.

For premises near Lenham station, less than half a mile to the south-west of Lenham, footfall is part of the plan: work is phased so shops and offices keep trading. In hotels such as Chilston Park Hotel, 1.3 miles to the south of Lenham, refurbishments usually mean bathroom, bar and reception joints where a matched sealant colour has to sit with the finishes. On a business park such as Roebuck Business Park, 1.7 miles west of Lenham, sealant work tends to follow fit-outs: receptions, tea points, washrooms and frame perimeters.

Lenham is about 7 miles south of Sittingbourne, in Kent. Lenham sits inside our coverage, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Across Kent, 931 places are covered, including Lenham. We also cover London, some 39 miles away.

We take on sealant joints across the ME17 postcode area, for business premises of every kind. For a building on High Street, Mitchell Close and Hatch Road or nearby, send details and we’ll quote for sealant joints. Close to Lenham, our area also takes in Leadingcross Green (1 mile south), Woodside Green (1 mile north-east), West Street (1 mile north-east), Lenham Forstal (2 miles south-east) and Lenham Heath (2 miles south-east). Nearby towns on our patch include Maidstone (8 miles west), Ashford (9 miles south-east), Sittingbourne (7 miles north), Faversham (9 miles north-east), Minster (13 miles north) and Kings Hill (13 miles west).

What’s near Lenham

Locally, jobs take us to sites close to Kiln Wood, The Red Lion pub and The Lenham School and the streets around them. There’s a railway station in Lenham itself: Lenham station. A little further out are Coldbridge Castle (2.7 miles south) and The Dog Collar Museum (3.6 miles west).

Map of Lenham © OpenStreetMap contributors
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