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

Harrietsham coloured sealant

Coloured and colour-matched sealant for visible joints in Harrietsham and across Kent. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Joints that need to match a new RAL frame colour
  • Poorly tooled joints on visible finishes
  • Coloured joints that have cracked with movement
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
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 & Constructionline
£5m public liability

Coloured sealant across Harrietsham

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

How we handle coloured sealant in Harrietsham

We can agree a short trial length before the full run. Cured sealant may look a shade different from the wet bead, and lighting changes it again. Let us know who signs off colour, and we’ll fit the sample into the programme. Most enquiries involve old colour-matched joints lifting at the edges and previous reseals that don’t match the original, across cladding panels, hotel bathrooms and public areas and office fit-out finishes. Whether you call it commercial sealant work, mastic application or joint sealing, in Harrietsham it comes down to the same thing: the right product in a properly prepared joint.

Sealant jobs for businesses in a place the size of Harrietsham are often best grouped: shopfront, washroom, kitchen and any external joints done together. That keeps travel and disruption down, and where colour matters on the frontage, we’ll confirm what’s available for the product.

Every job ends the same way: guaranteed. Our workmanship is backed for 12 months, and we explain exactly what that covers when we quote.

Location
Harrietsham (ME17)
Wider area
Kent
Guarantee
12 months on every job
Quote
A fixed quote before we start
Telephone
01277 525 020
Updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

How the job changes by surface

Office fit-outs

Office fit-outs include glazed partitions, kitchens, washrooms and reception areas. Colour-matched joints keep the finish consistent across floors at handover.

Natural stone

Stone has variation, so the aim is a colour that sits naturally against it. A stone-compatible, neutral-cure sealant avoids staining in a colour chosen from its range.

Keeping the joints sound

For the best life from the joints:

  • Clean coloured joints with mild products
  • Keep the colour details for future repairs
  • Agree the sealant colour early and write it into the specification
  • Keep the same sealant colour across a brand

Use gentle cleaning methods on coloured sealant. Strong solvents and abrasive pads can dull or mark the surface.

Make sure every contractor knows which sealant and colour are on the building file. It stops mismatched repairs creeping in.

When to call us in Harrietsham

Internal joints can stain from cleaning products, spills or mould. Mould that has rooted into a bead rarely cleans out, so the joint is replaced.

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

  • Old colour-matched joints lifting at the edges
  • Smeared sealant on stone or joinery
  • Joints that need to match a new RAL frame colour
  • Stained or mouldy coloured joints in washrooms

Offices and shops close to stations such as Harrietsham station, less than half a mile to the north-west of Harrietsham, tend to be busy all day, so sealant work is planned around opening hours.

Questions to ask before you book

  • What the guarantee covers, and for how long
  • Their approach to joint depth and backing
  • Whether primer will be used where the manufacturer specifies it
  • Proof of insurance

Choosing a commercial sealant contractor

From enquiry to sign-off

The first thing on site is a walk round with your contact, agreeing which joints are in scope, where to start and what must stay open. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. What matters most for a job in Harrietsham is a clear list of what needs doing. You will then get a fixed price for the work.

  1. We start with photographs, drawings or a visit to see the finishes.
  2. We send the closest colours from the product’s range.
  3. The programme and access are agreed, including any phasing.
  4. Joints are prepared, primed where specified and backed.
  5. The agreed colour is installed and tooled neatly.

Before we start on site

  • Explain the parking and delivery arrangements
  • Tell us which areas need to stay in use
  • Tell us what induction or permit system the site runs

Get 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 will fill any gaps with a visit.

Ask for a quote

Read more

Why deal with it now?

A brand roll-out or multi-site fit-out benefits from a consistent sealant colour. Fixing the colour reference at the start keeps every site the same. For buildings in places like Harrietsham, one well-planned visit beats several small ones, so it’s worth dealing with every failing joint at once.

There’s no price list, because the scope varies so much from one building to the next. Call for a quote and we will price your job on its own details.

Why choose Mastic Doctor in Harrietsham

  • Commercial sealant work since 2005
  • RAL and finish matching where the product range allows
  • Public liability insurance in place
  • Fixed quotes based on photographs, drawings or a visit

Take a look at our cost guide or our accreditations and insurance.

Harrietsham: questions and answers

Is a smaller place like Harrietsham outside your area?

No. Places such as Harrietsham are covered as much as the big towns. We cover Greater London and the counties of the South East. We plan jobs in smaller places so return trips are kept to a minimum.

Can the sealant on our Harrietsham premises match the finishes?

Yes. Colour matching to frames, cladding, stone and shop-fit finishes is a regular part of the work. Available colours for the product are confirmed with the quote.

Are you fully insured?

Yes. We’re fully insured, including public liability cover.

What if there’s asbestos in the old mastic?

Some older mastics, especially in pre-2000 buildings, can contain asbestos. 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.

When can the area be used after sealing?

We’ll confirm how long the chosen product needs to cure, and flag anything to keep off until it has cured.

How long will the new sealant last?

There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Sealant joints are maintenance items, so inspect them regularly.

Can staff carry on working while you are here?

Normally, yes. We phase the work so most of the building stays in use.

What Harrietsham’s businesses ask us to seal

Rainfall across the South East, Harrietsham included, is lower than in many parts of the UK. External joints still need dry faces and the right temperature, and damp or frosty mornings can hold work up. Harrietsham is about 38 miles from central London. The South East around the capital has large numbers of business parks, offices and retail centres, especially around the motorway corridors. Occupiers with several premises in the region tend to prefer one contractor and one point of contact.

Parks like Roebuck Business Park (to the west of Harrietsham) see tenants come and go, and every move-in brings joints to seal.

Harrietsham is about 7 miles east of Maidstone, in Kent. We send applicators to Harrietsham for colour-matched joints, handled exactly as we handle every other area. 931 places across Kent fall within our area, Harrietsham among them. Our London page has more on work in that area (38 miles or so).

If you need coloured sealant in ME17, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. If your site is on Church Road, Station Road and Norris Walk or close by, send details and we will quote for colour-matched joints. Just outside Harrietsham, we also work in Marley (1 mile east), Pollhill (1 mile west), Chegworth (1 mile west), Sandway (1 mile south-east) and Platt's Heath (1 mile south). Nearby towns on our patch include Maidstone (7 miles west), Ashford (11 miles south-east), Sittingbourne (7 miles north), Faversham (10 miles north-east), Minster (13 miles north-east) and Kings Hill (12 miles west).

What’s near Harrietsham

In Harrietsham, that means premises near Kiln Wood, The Lenham School and The Roebuck Public House. There’s a railway station in Harrietsham itself: Harrietsham station. Other landmarks nearby include The Dog Collar Museum (2.1 miles west) and Leeds Castle (2.2 miles west).

Map of Harrietsham © OpenStreetMap contributors

Should maintenance staff do it?

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.

Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.

Accreditations

Trusted. Accredited. Insured.