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

Sealant applicators in Dollis Hill

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

  • Expansion joints with the sealant torn out
  • Mouldy silicone around WCs, urinals and vanity tops
  • A top-up bead over failed sealant, now lifting
1
Send details
Send the specification, photos or a marked-up plan.
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
Signed off, with 12 months’ guarantee.
London, the South East & Scotland
CHAS accredited
£5m PL insurance

Commercial sealant contractors for businesses in Dollis Hill

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

Frontages, fit-outs and joints in Dollis Hill

Three care or nursing homes sit less than 2 miles from Dollis Hill. In care settings, a neat joint at a kitchen worktop or a lounge window is part of keeping the place easy to clean. Less than 3 miles from Dollis Hill there are at least three named estates and business parks. Units on sites like these change tenants and get refitted, and each refit leaves joints to seal, often in a colour the occupier specifies.

Premises within reach of Brent Cross West station (under half a mile north-east of Dollis Hill) often have busy frontages where joints are seen by everyone passing. Occupiers with premises at both Brent Cross Shopping Park and Falcon Park Industrial Estate could have the sealant at each handled under one quote.

Dollis Hill is about 1 mile north-east of Neasden, in Greater London. We cover Dollis Hill, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Dollis Hill is one of 764 places in Greater London on our list for sealant joints. Sites around London have their own page, about 7 miles away.

If you need commercial sealant contractors in NW2, NW10 and NW9, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. For a building on Brook Road, Lane Close and Crest Road or nearby, send details and we’ll quote for sealant joints. Close to Dollis Hill, our area also takes in Staples Corner (1 mile north-east), Neasden (1 mile south-west), Cricklewood (1 mile south-east), Willesden (1 mile south) and Brent Cross (1 mile north-east). Bigger towns within reach include London (7 miles south-east), City of Westminster (5 miles south-east), Marylebone (5 miles south-east), Kensington (5 miles south), St Pancras (6 miles south-east) and Shoreditch (7 miles east).

Around Dollis Hill

Locally, jobs take us to sites close to Woodfield School, The Crown Public House and Gladstone Park. There’s a railway station in Dollis Hill itself: Brent Cross West station. Other landmarks nearby include Brent Cross Shopping Centre (1 mile north-east) and St Andrew's Hospital (less than half a mile south). The countryside around Dollis Hill includes Darland's Lake and Parliament Hill.

Map of Dollis Hill © OpenStreetMap contributors

Commercial sealant contractors in Dollis Hill

Sealant joints are easy to overlook until one lets water in, and in an occupied building failure typically announces itself as a stained ceiling or an unhappy tenant. We’re commercial sealant applicators for FMs, managing agents, landlords and contractors with sites in Dollis Hill. Our job is to diagnose the failure, remove the old bead and seal again using a product chosen for the movement and exposure. We work on window and door perimeters, washrooms and tea points and movement joints in walls and floors, and what we’re called in for most is sanitary sealant that has gone black and patchy and a top-up bead over failed sealant, now lifting. Whoever orders the work in Dollis Hill, the brief is normally the same: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

Quotes for commercial sealant in Dollis Hill can come from photos and a joint schedule, or from a walk-round, and the scope is set out in writing.

Buildings in a London area such as Dollis Hill rarely close for maintenance: occupied offices, ground-floor retail under residential floors and busy shared entrances. We plan the joints floor by floor or unit by unit with the building manager, so areas stay in use.

Every job is signed off with a 12-month guarantee. The promise is simple: if the work we did fails within twelve months, we return to fix it.

The Mastic Doctor team beside their liveried vans in front of an office building
Location
Dollis Hill (NW2, NW10, NW9)
Region
Greater London
Guarantee
A 12-month guarantee
Quote
Fixed quote, scope in writing
Telephone
01277 525 020
Updated
3 November 2026

What sealant work can’t fix

Some faults sit outside our scope, and we say so rather than covering them up:

  • Leaking roofs, gutters or flat-roof membranes (those need a roofer)
  • Faulty windows rather than failed perimeter sealant
  • Old mastic that tests positive for asbestos

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

Surfaces we seal

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

From enquiry to sign-off

We follow your site rules from the start: sign-in, induction and whatever permit system the building uses. With the paperwork done, the joints are worked through in the order agreed with your site contact. Most London premises stay occupied while we are on site, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.

  1. We start with the evidence: photographs, drawings or a look on site.
  2. You get a fixed quote covering removal, preparation and the new sealant.
  3. We agree the order of work, access windows and site hours with you.
  4. Each joint is stripped, cleaned back to sound faces and primed where the maker specifies.
  5. Backing goes in, the new sealant is laid and tooled, and the area is left neat.
  6. Completed areas are signed off with you under our 12-month guarantee.

Preparing the site

  • Send your site hours and access windows
  • Make sure the joints can be reached
  • Arrange parking or a loading space

Quotes

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, speak to us on 01277 525 020 or use the quote form.

Get a quick quote

Read more

What happens if it’s left?

On many buildings the mastic was done by whichever trade was on site. Choosing the product, setting the depth and preparing the faces are what a specialist brings, the three things that decide how long a joint lasts. You notice the difference years later, not on the day. Getting scaffold, permits or access booked in Dollis Hill takes effort, so it makes sense to deal with every failing joint while access is in place.

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

Why choose Mastic Doctor in Dollis Hill

  • One phone line for London, the South East and Scotland
  • Public liability insurance in place
  • Health and safety: CHAS accredited
  • Sealing commercial buildings since 2005

Read our cost guide or our accreditations and insurance.

How the quote is worked out

What shapes the price:

  • Whether old sealant has to be cut out first
  • Location, for remote and island sites
  • Whether the work must be split into stages
  • The size and state of each joint

Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote, and you will have a fixed figure to work with.

Details that help us quote

A good diagnosis starts with the right details. Let us know:

  • The type of building and who uses it
  • Clear photos of the problem areas
  • Asbestos survey details if the building is older
  • Drawings or a marked-up plan, if available

For a fixed quote, give us a call on 01277 525 020 or send photos by email. You can also send details through our quote form.

Surface by surface

Commercial kitchens and tea points

Gaps and ragged beads trap dirt that cleaning can’t reach, which matters when environmental health officers look at a kitchen. Work is timed around the hours you give us so the kitchen isn’t out of use longer than needed.

Window and door perimeters

The perimeter joint between a frame and the structure keeps rain out of the reveal. Failed perimeters are cut out and cleaned, backing goes into deeper gaps, and the joint is resealed with a low-modulus neutral-cure silicone or another suitable product.

FAQs: Dollis Hill

Do you take on jobs in Dollis Hill where loading and access are tightly controlled?

Yes, we plan every London job around the building’s own access rules. Say when the building is occupied and when it’s quiet, and we will plan accordingly. The ULEZ covers the whole of Greater London, which we allow for

Is Brent Cross Shopping Park, near Dollis Hill, within your area?

Yes, sites like Brent Cross Shopping Park are within our area, along with the rest of Dollis Hill. To start, just call the office on 01277 525 020 or email drawings and photos with the unit, the joints involved and your access times.

What do you need from us to quote?

Start with whatever information is to hand. Questions or a site visit follow where needed.

Can one contractor look after sealant on all our buildings?

Yes, within the areas we cover: South East England, Greater London and Scotland. One contact and one process for every building makes a portfolio easier to manage.

Do you check for asbestos before removing sealant?

On older buildings, our first request is the asbestos survey. The duty to manage asbestos sits with the dutyholder and removing it isn’t something we do.

Do you hold CHAS accreditation?

Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.

Do you work in Dollis Hill?

Yes. Sites across Dollis Hill are covered, and the same phone number covers every area.

When to call us in Dollis Hill

Washrooms and kitchens wear sealant out in their own way. Constant moisture, cleaning chemicals and weak extraction let mould grow into the sealant, and once established it rarely cleans out. The fix is a new bead of anti-mould sanitary silicone.

Things that typically lead to an enquiry:

  • A top-up bead over failed sealant, now lifting
  • Weathered facade sealant that no longer flexes
  • Expansion joints with the sealant torn out
  • Untidy joints in a reception, shop floor or lobby

A hotel such as The Crown Moran Hotel (1 mile south-east of Dollis Hill) shows how much sealant a hospitality building has on show, from bathroom joints to the bar.

Questions to ask before you book

  • How joint depth will be controlled
  • How long is the guarantee, and what does it include?
  • Which product they’ll use, and why it suits the joint
  • Will failed sealant be removed rather than covered?

Questions to ask before you appoint anyone

Accreditations

Trusted. Accredited. Insured.