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

Sealant applicators in Ruxley

Our CSCS-carded applicators take on sealant work for offices, shops, hotels and other commercial buildings in Ruxley and the surrounding area. Send details for a fixed quote.

  • Black mould through washroom sealant that won’t clean off
  • Hardened, chalky sealant on south-facing or exposed elevations
  • Window and door perimeter joints that have cracked open
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
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS accredited
£5m PL insurance

Commercial sealant contractors across Ruxley

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

Looking after the joints

To get the most from the new sealant:

  • Log reseals in the O&M or maintenance records
  • Act on the first lifting edges rather than waiting
  • Brief cleaning contractors to avoid scourers and blades on sealant
  • Keep washroom and kitchen extraction working

In washrooms and kitchens, extraction makes a real difference to sealant life. Fans that are broken or switched off leave joints damp for longer. It’s worth having fans checked while the sealant is fresh.

Once sealant fails in a movement joint, grit and debris get in. With nothing soft to close against, the materials either side take the load and start to break up. That turns a sealant job into something bigger.

Commercial sealant contractors for commercial buildings in Ruxley

Some sealants used before 2000 can contain asbestos, so older stock needs a check first. We ask to see the asbestos register or survey before old sealant is disturbed, since managing asbestos is the dutyholder’s responsibility. If a material is suspected, work stops until it’s tested (removing asbestos-containing materials isn’t something we do). Site teams most often ask us about untidy joints in a reception, shop floor or lobby and mouldy silicone around WCs, urinals and vanity tops, across washrooms and tea points, movement joints in walls and floors and kitchen worktops and splashbacks. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, the work in Ruxley is the same: the right product in a properly prepared joint.

The most common commercial job in Ruxley is resealing joints that have simply reached the end of their life: hardened, cracked or shrunk away from the faces, and letting water or dirt in.

Much of the planning for a London commercial job is about getting in and out: booked loading, goods-lift times, the permit system and a place to stage materials. Once that’s settled, the sealant joints are resealed in sections so tenants are disturbed as little as possible.

Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.

The Mastic Doctor team beside their liveried vans in front of an office building
Location
Ruxley (DA14)
Wider area
Greater London
Guarantee
12 months on every job
Price
Fixed quote, scope in writing
Phone
01277 525 020
Last updated
3 November 2026

Questions we are asked in Ruxley

Will you take on work at estates like Crayfields Business Park, close to Ruxley?

Yes. We cover Ruxley and the area around it, including industrial estates, business parks and retail parks such as Crayfields Business Park. Photos and a short description are enough for a first look.

Can you work in a London building with booked loading and goods-lift slots?

Yes, most London buildings have access rules of some kind, and we plan around them. The building manager’s rules go straight into our method. All of Greater London is inside the ULEZ, and our planning allows for it

Are you CHAS accredited and on Constructionline?

Yes. We are CHAS accredited, we are a Constructionline member and we use CSCS-carded applicators.

Do you work for facilities managers and managing agents?

Yes, and through main contractors too. We quote, schedule and report back in the way that suits your process, with a 12-month guarantee on the workmanship.

Do you take on multi-site sealant work?

Yes, we can. Send a list of addresses and what’s needed at each, and fixed prices follow, with a suggested sequence.

How do we get a quote?

Photos, drawings or a schedule of the joints are normally enough to start. If a visit is needed we will book one, and a fixed quote follows.

Do your applicators hold CSCS cards?

Yes. Should the site need card details in advance, let us know and we will send them with the quote.

What Ruxley’s businesses ask us to seal

The 3 miles around Ruxley 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. Ruxley has seven care or nursing homes no more than 2 miles away. Kitchens and communal rooms in care settings are cleaned constantly, so their joints need to be smooth and sound.

On a business park such as Crayfields Business Park, which lies south-west of Ruxley, sealant work tends to follow fit-outs: receptions, tea points, washrooms and frame perimeters. Sites a few miles apart, such as Crayfields Business Park and Crayfields Industrial Park, can share one programme and one point of contact. For a shop at a centre such as Nugent Retail Park (1.7 miles south-west of Ruxley), tidy joints at counters and displays matter as much as the fixtures.

Ruxley is about 2 miles south-east of Sidcup, in Greater London. We cover commercial sites throughout Ruxley. We work across 764 places in Greater London. London is covered too, some 11 miles away.

Commercial sites across DA14 are covered. Nearby places we also cover include Upper Ruxley (1 mile south-east), Foots Cray (1 mile west), Hockenden (1 mile south-east), North Cray (1 mile north) and Stonehill Green (1 mile east) for sealant joints. Further afield, our area takes in London (11 miles north-west), City of Westminster (14 miles north-west), Marylebone (14 miles north-west), St Pancras (13 miles north-west), Shoreditch (12 miles north-west) and Walthamstow (14 miles north-west).

Around Ruxley

Locally, jobs take us to sites close to Kemnal Technology College, Foots Cray Meadows and Walsingham School, among other places. The closest station to Ruxley is Albany Park station, about 1.5 miles north of the centre. Nearby you will also find Metropolitan Police Museum (1.8 miles north-west) and Eynsford Castle (4.6 miles south-east). Not far away are The Warren and Summer Hill.

Map of Ruxley © OpenStreetMap contributors

When to bring in a specialist

Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.

For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class.

What the job involves on each surface

Window and door perimeters

Inside, cracked sealant around frames and window boards is common. We use a paintable product where decorating follows and a silicone where it doesn’t.

Washrooms and toilets

Black sealant in a toilet block is normally beyond cleaning. Replacement is the fix: strip, clean, dry and reseal, planned so the building keeps enough facilities in use.

Leave it or put it right?

A cheaper quote sometimes means the old bead stays in. New sealant laid on old silicone has nothing to bond to, so it peels. Every quote we give includes full removal and preparation, because that’s what makes the new bead last. Access in London is hard enough to arrange once, so while access is arranged it pays to renew all failing joints, not just the worst.

The price depends on how many linear metres there are, what has to come out first and the access. Call for a fixed quote when you are ready.

Why appoint us

  • Colour agreed before work starts
  • Products installed to the manufacturer’s instructions
  • Fully insured, including public liability cover
  • Health and safety: CHAS accredited

Read our cost guide and our accreditations.

Our process

Working in a building that stays open takes some planning. The work area is signed and kept contained, with routes through the building left open and move on in phases so staff and visitors can carry on around us. Planning a London job such as one in Ruxley starts with access: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Give us the hours we can be on site and we will schedule to suit.

  1. Send details through our quote form, or ask for a site visit.
  2. We diagnose the cause of failure and price a fixed scope.
  3. Where parts of the building must stay open, the work is phased.
  4. Every failed bead is removed rather than covered.
  5. A suitable product for each joint goes in at the right depth and is tooled.
  6. A final walk-round, then the 12-month guarantee applies.

Preparing the site

  • Have the specification and drawings to hand
  • Let building users know which areas are affected
  • Make sure the joints can be reached

Quotes

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. For smaller jobs, photos and a description will do.

Ask for a quote

Related advice

How the quote is worked out

What shapes the price:

  • Any access equipment needed
  • Quantities, in metres or numbers
  • Travel to remote or island sites
  • Backing rod, priming and other preparation

Larger quantities, tricky access or phasing all shape the price. So do site requirements such as inductions and permits.

Sending details for a quote

Good information means a firmer quote. When you get in touch, include:

  • Photos of the joints, close up and from further back
  • Whether an asbestos survey exists
  • Access details, including height
  • Specification clauses that apply

Quotes are fixed against the scope you send, so the cost is agreed before work starts. To ask for one, give us a call on 01277 525 020 or email drawings and photos.

Accreditations

Trusted. Accredited. Insured.