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

Lynsted construction mastic

Work needed on a mastic package in Lynsted? We look at it, seal it with the right product and hand it over with a 12-month guarantee.

  • New external sealant already peeling away
  • Sealant knocked or painted over by other trades
  • Frame gaps too wide for sealant alone
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
Signed off, with 12 months’ guarantee.
South East, London & Scotland
Constructionline member
£5m PL insurance

Construction mastic for Lynsted sites

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

Lynsted: questions and answers

Can you work at a site such as Kent Science Park, by Lynsted?

Yes, sites like Kent Science Park are within our area, along with the rest of Lynsted. Send details of the unit and the work through our quote form for a quick quote.

Is Lynsted off your patch?

No. Small places get the same service as large ones. We work across Greater London and the South East. Where we can, we group nearby jobs to make the most of each trip.

Do you take on small jobs?

Whatever the size, the process is the same: details, then a fixed price, then sealing, then a 12-month guarantee.

Can one quote cover more than one building?

Yes. Multi-site work and planned programmes are a core part of the service, planned site by site to suit how each building is used.

Do you take on mastic snagging only?

Yes. Send the snag list or photographs and we will price it.

How do we ask for a quote?

You can use the quote form on this site; alternatively, ring 01277 525 020 or email drawings and photos. Include photographs or drawings if you have them.

What hours do you work?

We’re in the office from 8am until 5pm, Monday to Friday. Tell us your site hours and access windows and the work will be fitted around them.

Construction mastic for commercial buildings in Lynsted

Refurbishment work needs a slightly different approach from new build. Existing joints have to be stripped back to sound faces, because fresh sealant can’t key into cured silicone and the asbestos survey is checked first on older stock. New and existing joints then get the same preparation. If you have cracks opening in caulked internal joints and frame perimeters left unsealed or poorly sealed, we can put it right. Whether you call it commercial sealant work, mastic application or joint sealing, the work in Lynsted is the same: failed joints cut out, faces prepared and the right sealant laid to the right depth.

Sites around smaller places like Lynsted can be a fair drive from suppliers, so we come with everything the package needs, timed to the stage the job has reached. Drawings, photos and the programme let us give a fixed quote.

We sign every job off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.

Place
Lynsted (ME9)
Wider area
Kent
Cover
12 months on our workmanship
Quotes
A fixed quote before we start
Telephone
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

For managing agents and facilities managers

CHAS accredited and a Constructionline member, we make supplier vetting simple. We’re fully insured, and our insurance certificate can go with the quote.

Building owners and managing agents use us on everything from one building to a spread of sites. Several sites can go on one quote, which keeps the paperwork simple.

Our process

Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Joint faces are cleaned back to sound, dry surfaces, the manufacturer’s primer is applied where it’s called for, and the sealant is tooled off neatly. For work around Lynsted, we aim to finish in one visit, so we ask for photographs and rough sizes first. Then the right materials arrive with us.

  1. We start with the drawings, specification and programme.
  2. We take off quantities and return a fixed quote.
  3. We agree with the site team which areas come first.
  4. Each area is sealed when it’s released.
  5. Joints are prepared, backed and sealed to the specification.
  6. After snagging, the work is handed over under our 12-month guarantee.

Before we start on site

  • Arrange parking or a loading space
  • Send any specification or drawings in advance
  • Point out any areas we must not close

Request a quote

Photos, drawings or a schedule of the joints and a fixed quote comes back to you. Where a site visit makes more sense, we will arrange one.

Ask for a quote

Advice

Common problems we fix in Lynsted

Value-engineered products sometimes end up in the wrong joints. A general-purpose silicone on a facade or a caulk in a wet area won’t perform like the specified product. We use what’s specified, and any substitute goes to you for acceptance.

Typical triggers for a call:

  • Bath and shower joints scraped during the final clean
  • Cracks opening in caulked internal joints
  • Perimeter gaps outside the sealant’s range
  • New external sealant already peeling away

New wings at hospitals like Sittingbourne Memorial Hospital, 2.7 miles north-west of Lynsted, bring long runs of window and panel joints to seal.

What to look for in a quote

  • Their public liability cover
  • The named product and why it was chosen
  • How the existing material will be dealt with
  • Health and safety accreditation such as CHAS

Choosing a commercial sealant contractor

Why it’s worth doing now in Lynsted

Refurbishments sometimes budget for new windows when the frames are sound and only the seal has failed. Sound frames often need only a new perimeter seal, which is a much smaller cost. We’ll say so if a frame itself is the problem. Halls, stores and units around places like Lynsted may not be checked every day, so a failed joint can leak for a while before anyone sees it. Resealing early avoids that.

The product called for affects the cost, as does the preparation each joint needs. Access, phasing and site requirements come into it too.

What you get with us

  • Constructionline member
  • Over 20 years of commercial sealing
  • Colours chosen to suit frames, cladding or finishes where possible
  • A fixed quote before work starts

Take a look at what affects the cost and our accreditations and insurance.

Building and refurbishing in Lynsted

The South East is one of the drier parts of the UK. Still, external mastic needs dry faces within the maker’s temperature limits, which isn’t every day, so the external programme keeps a little slack. Lynsted is about 40 miles from central London. Building activity in the commuter belt runs from new flats near stations to business park refurbishments, and each scheme needs its mastic sealed to programme.

New units and refits on sites such as Kent Science Park, 2.7 miles west of Lynsted, need their panel and perimeter joints sealed to the specification. Projects at schools like Lynsted and Norton Primary School work to term dates, so mastic is programmed tightly.

Lynsted is about 3 miles south-east of Sittingbourne, in Kent. If you’re looking for construction mastic in Lynsted, we can help, as we do across Kent. Our Kent coverage takes in 931 places, large and small. We also cover London, some 40 miles away.

We take on mastic packages across the ME9 postcode area. Streets here include The Street, St Pauls Court and Ludgate Lane, and sites on any of them can send details for a fixed quote. Just outside Lynsted, we also work in Bogle (1 mile north-east), Erriottwood (1 mile south), Bapchild (1 mile west), Newbury (1 mile south-west) and Radfield (1 mile north). Further afield, our area takes in Maidstone (12 miles west), Ashford (12 miles south), Canterbury (13 miles east), Sittingbourne (3 miles north-west), Whitstable (11 miles east) and Faversham (4 miles east).

Local landmarks in Lynsted

Recent enquiries here include premises near Sittingbourne Community College and Black Lion Public House, among other places. For rail, the closest station is Teynham station, about 1.6 miles north-east. Well-known places in the area include Newnham Castle (2 miles south) and Sittingbourne Heritage Museum (2.6 miles north-west).

Map of Lynsted © OpenStreetMap contributors

How the job changes by surface

Fire-rated sealant where specified

Not every penetration suits a sealant. Other products are used for some services and gaps, and we’ll tell you if the detail calls for something else. Record requirements are agreed with the quote.

Internal decorators’ caulk

Where the specification calls for it, acrylic decorators’ caulk goes on non-moving internal gaps before painting. It’s paintable and suits gaps that don’t move.

What we can’t put right

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

  • Damage to finishes by other trades after we’ve sealed
  • Oversized gaps that need packing or adjustment by others
  • Fire-stopping design or sign-off (that’s for the designer, fire engineer and building control)

If in doubt, speak to us on 01277 525 020 or email drawings and photos and we’ll say what we think before you book.

Surfaces we seal

  • Brick and block movement joints
  • Internal decorators’ caulk
  • Cladding and panel joints
  • Sanitary and kitchen joints
  • Window and door perimeters
  • Floor and skirting junctions
Accreditations

Trusted. Accredited. Insured.