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

Construction and new-build mastic in Brompton, Medway

Commercial sealant work in Brompton for contractors, FMs and building owners: mastic packages for new-build and refurbishment projects, with a fixed quote first.

  • External joints sealed in damp or cold conditions that are now failing
  • A long mastic snag list close to completion
  • Cracks opening in caulked internal joints
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
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS accredited
£5m PL insurance

Construction mastic for Brompton sites

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

Building owners, agents and FMs in Brompton

Main contractors use us as their sealant subcontractor. Programme, specification and site rules come first.

If you look after buildings for someone else, clear figures and clear communication matter. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative.

Construction mastic in Brompton

The specification and the programme set the job, not to habit. If a product is named, that’s what goes in; any alternative we suggest is put to you before anything changes. Backing, primer and depth follow what the sealant maker sets out. We work on brick and block movement joints, internal decorators’ caulk and sanitary and kitchen joints, and the usual reasons a site gets in touch are frame perimeters left unsealed or poorly sealed and cracks opening in caulked internal joints. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Brompton, that means joint design, primers and backing rod as standard.

In a smaller place such as Brompton, construction tends to mean small housing schemes, conversions and extensions to community buildings. Even a small site needs its perimeter and facade joints sized, backed and sealed properly.

We stand behind the joints we seal: 12 months, guaranteed. It covers how we prepared and applied the sealant, and we come back if anything isn’t right.

The Mastic Doctor team standing beside their branded vans outside an office building
Where
Brompton (ME4, ME7, ME2)
Region
Medway
Cover
A 12-month guarantee
Price
A fixed quote before we start
Call
01277 525 020
Updated
3 November 2026

Questions we’re asked in Brompton

Will you plan work around the academic year at somewhere like University of Kent - Medway Campus?

Yes. Tell us the term dates, vacation periods and access windows, and we’ll plan the work around them. Let us know which documents your site asks for, and we’ll confirm them alongside the quote.

Can you take on a job at a hospital such as Medway Maritime Hospital?

Yes. Healthcare sites are among the places we work. Each area is agreed with the ward or department and the estates team in advance.

Do you take on multi-site work?

Yes. We take on portfolio and planned maintenance work, planned site by site to suit how each building is used.

Do you guarantee new-build sealant work?

It carries a 12-month guarantee on our workmanship. We’re also fully insured for public liability.

Can the sealant be colour-matched?

It depends on the product. Some ranges are wide, others limited, so the available colours are confirmed with the quote.

How do you deal with asbestos in old sealant?

Asbestos is possible in some older mastics, particularly in buildings from before 2000. Before we disturb old sealant in an older building, we ask to see the asbestos register or survey, and if asbestos is suspected, work stops until it’s tested. Removing asbestos is a job for asbestos specialists, not us.

Can you work to our specification?

We work to the specification and the manufacturer’s installation guidance. Primers, backing and joint depth follow what the manufacturer sets out.

What happens if it’s left?

Some packages split mastic across the window fitter, kitchen fitter and plumber. In practice it often means different standards, gaps in responsibility and snags nobody owns. One mastic subcontractor for the lot keeps it simple, with the same standard on every plot. Small buildings around Brompton suffer from failed joints as much as large ones. Early resealing avoids the damage that follows a leak.

Larger quantities, tricky access or phasing all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.

Why clients in Brompton choose us

  • Coloured sealants to suit the setting, where available
  • Workmanship guaranteed for 12 months
  • Colours chosen to suit frames, cladding or finishes where possible
  • CSCS-carded applicators

Read our cost guide or how we’re accredited.

What the job involves on each surface

Fire-rated sealant where specified

Not every penetration suits a sealant. Collars, wraps, batts and boards are specified for other services. Record requirements are agreed with the quote.

Window and door perimeters

Frames sealed into the opening keep rain out of the reveal. We use the specified perimeter sealant, normally a low-modulus neutral-cure silicone.

Contractors’ notes for Brompton

Brompton is within about 2 miles of the coast. Coastal exposure means perimeter and cladding joints work harder than on an inland job, so we check the specified product suits the exposure before the first bead. At about 28 miles from central London, Brompton is within reach of the capital. Building activity in the commuter belt runs from new flats near stations to business park refurbishments, which keeps mastic packages in demand.

For contractors refurbishing units at places like Railway Street Industrial Park (1 mile east of Brompton), the mastic covers cladding panels, roller-door and window perimeters. Extensions at sites like Medway Maritime Hospital, 0.8 miles to the south-east of Brompton, typically sit beside working departments, and the mastic follows strict access rules.

Brompton is about 1 mile east of Rochester, in Medway. We cover commercial sites throughout Brompton. We work across 54 places in Medway, large and small. London is covered too, around 28 miles from Brompton.

Commercial sites across ME4, ME7 and ME2 are covered. We cover commercial and managed buildings on Dock Road, Globe Lane and South Road and the roads nearby. Just outside Brompton, we also work in Chatham Waterfront (1 mile south-west), Rochester Riverside (1 mile west), Frindsbury (1 mile north-west), Luton (1 mile south) and Hale (2 miles south-east). Nearby towns on our patch include Rainham (4 miles south-east), Park Wood (4 miles south-east), Lordswood (4 miles south), Twydall (3 miles south-east), Hoo St Werburgh (3 miles north-east) and Wigmore (4 miles south-east).

Landmarks near Brompton

In Brompton, that means premises near King George V Public House, Brompton Academy and Hospital and Medical Tuition Service. You will also find St Michael the Archangel Church (0.8 miles south-west), Great Lines Heritage Park (under half a mile south-east) and Former Ordnance Store At Chatham Gun Wharf (under half a mile south-west). The closest station to Brompton is Chatham station, about 0.7 miles south-west of the centre. A little further out are Medway Maritime Hospital (0.8 miles south-east) and Pentagon Shopping Centre (under half a mile south-west). Green spaces nearby include Rede Common and Gad's Hill.

Map of Brompton © OpenStreetMap contributors

What sealant work can’t fix

A proper diagnosis includes knowing what sealant can’t do. We will tell you if the real problem is one of these:

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

If you’re not sure, just phone 01277 525 020 or send details through our quote form and we will give you a straight answer.

Surfaces we seal

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

Signs you need construction mastic in Brompton

Wide, tapered or inconsistent gaps around frames are a common problem. Sealant has a range of joint widths it can cope with. Better to raise it at the start than seal a joint that’s bound to fail.

Any of the following is a good reason to get the joints checked over:

  • Snag items on joints that need redoing before handover
  • New external sealant already peeling away
  • Cracks opening in caulked internal joints
  • Inconsistent sealant finishes from plot to plot

On a campus such as University of Kent - Medway Campus (0.5 miles north of Brompton), new teaching buildings and residences are typically built and refurbished around the academic year.

Questions to ask before you book

  • Is depth set with backing rod, or bond-breaker tape in shallow joints?
  • Will CSCS-carded applicators be on site?
  • What the guarantee covers, and for how long
  • Are they CHAS accredited or on Constructionline?

How to choose a sealant contractor

How a job runs

At the end of each section, the masking comes off, the area is cleaned and every joint is checked with your site contact. Where the sealant needs time to cure before use, we tell you and sign the area. For a job in Brompton, the main thing is a clear picture of the work, so send photos of each area. You will then get a fixed price for the work.

  1. Drawings, the sealant specification and your programme come to us for pricing.
  2. A fixed quote sets out the scope, the products and the sequence.
  3. Any site paperwork you need (RAMS, insurance certificate, CSCS details) is confirmed with the quote.
  4. Work follows the programme, area by area, as rooms and elevations become ready.
  5. Each joint is prepared, backed to depth and sealed in the product the specification names.
  6. Snags are cleared before handover and completed areas carry our 12-month guarantee.

Getting the site ready

  • For older buildings, check the asbestos register before work
  • Tell staff and tenants when we will be in
  • Agree which areas must stay open

Request a quote

Need a figure for a tender or a budget? Send the scope and any drawings, and we’ll return a fixed quote that you can work with. For a chat about it beforehand, ring 01277 525 020 or email us.

Get a price

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