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

Sealant specialists in Borstal

Commercial sealant work in Borstal for contractors, FMs and building owners: sealant work for offices, shops, hotels and other commercial buildings, with a fixed quote first.

  • Frame mastic that has hardened and come away from the wall
  • Gaps behind commercial kitchen worktops and sinks
  • Water staining near frames, panels or ceilings
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
12-month guarantee on our workmanship.
Covering the South East & Scotland
CHAS accredited
Fully insured: £5m PL

Commercial sealant contractors for Borstal sites

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

Commercial sealant contractors for commercial buildings in Borstal

Having a single contact for all your sites makes sealant far simpler to manage. Single jobs, multi-site packages and planned programmes all come to us, run the same way on every site: details in, a fixed quote back, the sealing done, then our 12-month guarantee. For sites in Borstal, the quickest start is to call the office on 01277 525 020 or email us with a list of addresses. We work on kitchen worktops and splashbacks, movement joints in walls and floors and window and door perimeters, and the usual reasons a site gets in touch are window and door perimeter joints that have cracked open and earlier reseals applied straight onto the failed bead. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, in Borstal it comes down to the same thing: the right product in a properly prepared joint.

A lot of what we do in Borstal is replacing sealant that has done its years: hardened, cracked or shrunk away from the faces, and letting water or dirt in.

Small businesses near places like Borstal frequently occupy converted farm buildings. Old masonry and timber meet new glazing and partitions in these buildings, and every junction needs a sealant that suits it.

Every job is signed off with a 12-month guarantee. The promise is simple: if our work fails within that year, we put it right.

Location
Borstal (ME1, ME2)
Wider area
Medway
Guarantee
A 12-month guarantee
Quotes
Quoted before any work starts
Call
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

How a job runs

We follow your site rules from the start: signing in, inductions and any permit to work. Once we are cleared to begin, we take the joints in the sequence agreed with you. For a site in Borstal, we plan so the whole job is done in one go where possible. Photos with rough sizes let us arrive with everything needed.

  1. We begin with whatever information you have, whether that’s photos, a drawing or a list of locations, and a site visit is booked where it helps.
  2. Next comes a diagnosis and a fixed quote.
  3. Before anything is cut out, we agree access, timings and sequence.
  4. We strip the failed bead and prepare both faces of the joint.
  5. The depth is set, primer is used where the maker calls for it, and the fresh bead is applied and tooled.
  6. We walk the completed areas with you and sign them off under the 12-month guarantee.

Getting the site ready

  • Arrange parking or a loading space
  • Tell staff and tenants when we’ll be in
  • Move anything stored against the joints

Get a fixed quote

Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to phone 01277 525 020 or email the details over with what you know.

Ask for a quote

Read more

Surface by surface

Shop fronts and retail fit-outs

In retail, sealant is on show. Counters, display units, shopfront frames and floor trims all need a neat line, frequently colour-matched to the fit-out. Colour options are confirmed with the quote.

Facade and cladding joints

Panel joints on cladding and rendered facades open and close with the temperature. The product has to suit the movement, and the depth has to be controlled with backing. We confirm the access in place before we quote.

Keeping the joints sound

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

  • Report cracked or peeling sealant early
  • Look at the sealant around anything that has been moved or replaced
  • Make sure ventilation in wet areas is switched on and working
  • Don’t let cleaning or traffic back on before the cure time is up

We stand behind the workmanship with a 12-month guarantee. Keep the handover details with your O&M or maintenance records.

In kitchens and washrooms, a failed joint is a cleaning problem as well as a leak risk. Environmental health officers look at how cleanable surfaces are.

What Borstal’s businesses ask us to seal

Borstal 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. The 3 miles around Borstal take in at least three named trading estates, business parks or retail parks. Tenant changes on such sites bring fit-outs, and fit-outs bring new joints.

Units at retail parks like Strood Retail Park (1.4 miles north of Borstal) change hands and get refitted, with new joints at every frontage. A business with units at Strood Retail Park and Castle View Business Centre needn’t use two contractors for its sealant.

Borstal is about 1 mile south-west of Rochester, in Medway. Looking for commercial sealant contractors in Borstal? We can help, as we do across Medway. 54 places across Medway fall within our area, Borstal among them. We also cover London, some 26 miles away.

If you need commercial sealant contractors in ME1 and ME2, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. If your site is on Hill Road, Manor Lane and Mount Road or close by, we can quote for sealant joints. Access to Borstal is via the M2 among other routes. If your building is just outside Borstal, we cover Rochester (1 mile north-east), Strood (1 mile north), Cuxton (1 mile west), North Halling (2 miles west) and Wouldham (2 miles south-west). Further afield, our area takes in Gillingham (4 miles east), Rainham (5 miles east), Park Wood (5 miles east), Lordswood (4 miles south-east), Twydall (4 miles east) and Hoo St Werburgh (5 miles north-east).

Landmarks near Borstal

Locally, jobs take us to sites close to Sir Joseph Williamson's Mathematical School, Former Ordnance Store At Chatham Gun Wharf and St John Fisher RC Comprehensive School and the streets around them. For rail, the closest station is Cuxton station, roughly 1 mile west of the centre. A little further out are Six Poor Travellers House (1.3 miles north-east) and Rochester Castle (1.3 miles north-east). Not far away are Blue Bell Hill and Ranscombe Farm.

Map of Borstal © OpenStreetMap contributors

Signs you need commercial sealant contractors in Borstal

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. It’s one of the commonest faults we find on earlier work.

Look out for the following:

  • Messy, uneven beads from earlier work that let the building down
  • A top-up bead over failed sealant, now lifting
  • Movement joints packed with grit and debris
  • Frame sealant that has cracked, shrunk or pulled away

Offices and shops close to stations such as Cuxton station (1 mile west of Borstal) tend to be busy all day, so sealant work is planned around opening hours.

Before you book anyone

  • What level of public liability insurance do they hold?
  • How the existing material will be dealt with
  • Are they CHAS accredited or on Constructionline?
  • What the guarantee covers, and for how long

Choosing a commercial sealant contractor

Questions we’re asked in Borstal

Will you take on work at estates like Strood Retail Park, close to Borstal?

Yes. We cover Borstal and the area around it, including industrial estates, business parks and retail parks such as Strood Retail Park. To start, just call 01277 525 020 or email us with the unit, the joints involved and your access times.

Is Borstal off your patch?

Not at all. Borstal is within our area. London and every South East county are within our area. We plan jobs in smaller places so return trips are kept to a minimum.

Is the old sealant taken out first?

Removal of the failed sealant is always part of the job. New sealant can’t grip the old bead, so laying over it never lasts; the faces are then cleaned and prepared.

What guarantee do you give on resealing?

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

Do you work for facilities managers and managing agents?

Yes. You can send details through our quote form, and tell us what site paperwork you need.

How long does a typical visit take?

It depends on the scope, though a typical visit typically takes part of a day on a small job and longer where several buildings or phases are involved. For bigger or phased jobs, we will set out a timescale with the quote.

Will your applicators have CSCS cards?

Yes. If you need card details for site access, let us know and we will send them with the quote.

When it isn’t the sealant

Being straight saves everyone time. Fresh joints won’t solve:

  • A dripping trap, valve or pipe behind a fitting
  • Faulty windows rather than failed perimeter sealant
  • Structural cracks or movement the joints weren’t designed for

If in doubt, speak to us on 01277 525 020 or send details through our quote form and we will say what we think before you book.

Where we work in Borstal

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

Work for main contractors and building owners

Facilities managers want contractors who arrive with the paperwork sorted. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.

Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.

Accreditations

Trusted. Accredited. Insured.