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

Sealant applicators in Old Malden

Commercial sealant contractors in Old Malden, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.

  • Sanitary sealant that has gone black and patchy
  • Weathered facade sealant that no longer flexes
  • Damp patches where an external joint has failed
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Signed off, with 12 months’ guarantee.
South East, London & Scotland
CHAS accredited
Fully insured: £5m PL

Commercial sealant contractors in Old Malden

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

What affects the price in Old Malden

Before we quote, we look at:

  • Site requirements such as inductions and permits
  • Travel to remote or island sites
  • Whether the work must be split into stages
  • Whether old sealant has to be cut out first

Whether it’s a single area or a whole estate, the same things set the price: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we’ll put a fixed figure on it.

Before you send an enquiry

A few photographs plus some basic facts will normally do. Please tell us:

  • Where the site is, with the postcode
  • Access details, including height
  • Clear photographs of the problem areas
  • Rough lengths or quantities, or drawings if you have them

Pricing a project or setting a maintenance budget? We will quote against your scope and drawings that you can work with. If you have questions first, call 01277 525 020 or email the details over.

Sealant applicators in Old Malden

Most of the buildings we seal stay open while we’re there. Work is scheduled around the site hours and access windows you give us; phased work can also be planned so areas stay in use. It’s the same approach in offices, retail units, hotels, schools and healthcare buildings. If you’re dealing with earlier reseals applied straight onto the failed bead and hardened, chalky sealant on south-facing or exposed elevations, we can put it right. Most enquiries from Old Malden start with one failed joint and grow into a wider look at the building: we check the joints around it and give you an honest view of what needs doing now and what can wait.

Multi-site clients with buildings in and around Old Malden can put several sites on one programme, so standards and paperwork match across every site.

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. With access agreed, we work through the sealant joints a section at a time, keeping disruption to tenants low.

Work we carry out in Greater London comes with a 12-month guarantee. If an installation problem shows up, give us a call on 01277 525 020 or email a schedule or drawings and we will arrange a return visit.

Mastic Doctor team members lined up next to their branded vans outside an office building
Place
Old Malden (KT19, KT4, KT5)
Wider area
Greater London
Cover
12 months on our workmanship
Price
A fixed quote before we start
Telephone
01277 525 020
Last updated
3 November 2026

Diagnose, treat, sign off

Occupied buildings need a little choreography. We sign and contain the area we’re in, with routes through the building left open and move on in phases so staff and visitors can carry on around us. Most London premises stay occupied while we are on site, so zones and timings are agreed with whoever manages the building. Areas are handed back as each section is finished.

  1. We start with the evidence: photos, 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. The failed sealant comes out and the faces are prepared, with primer where required.
  5. Depth is set with backing, then the sealant is applied, tooled and the area tidied.
  6. Completed areas are signed off with you under our 12-month guarantee.

Getting the site ready

  • Arrange parking or a loading space
  • Make sure the joints can be reached
  • Share your working hours and any access restrictions

Getting a fixed quote

For a fixed quote, give us a call on 01277 525 020 or email us. Our quote form is another easy route.

Get a price

Read more

What happens if it’s left?

Sealant is often treated as an afterthought by the trade that fitted the element. Choosing the product, setting the depth and preparing the faces are what a specialist brings, and they’re where most failures begin. You notice the difference years later, not on the day. In a London building, a failed joint rarely affects only one party: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.

Access often affects the price as much as the sealing: joints within easy reach take less time than ones that need access equipment. Mention the access as part of your enquiry.

Why choose Mastic Doctor in Old Malden

  • Old sealant cut out, never sealed over
  • Matching to RAL references, product permitting
  • CHAS accredited
  • Over 20 years of commercial sealing

Take a look at how commercial sealant jobs are priced and our accreditations.

Questions about Old Malden

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. Say when the building is occupied and when it’s quiet, and we will plan accordingly. All of Greater London is inside the ULEZ, and our planning allows for it

Do you cover business parks and estates near Old Malden, such as Beverley Trading Estate?

Yes, sites like Beverley Trading Estate are within our area, along with the rest of Old Malden. A few photographs and the unit address let us price the work.

When can the area be used after sealing?

Curing time varies by product, and we confirm it on the day, and sign any area that should be left alone.

Is your work guaranteed?

Our workmanship is guaranteed for 12 months. Public liability insurance is in place too.

What about asbestos in old mastic?

We check the asbestos register or survey before any old sealant is disturbed. Managing asbestos is the dutyholder’s responsibility and removing it isn’t something we do.

Can you supply RAMS and insurance details?

The paperwork is agreed with the quote: RAMS, an insurance certificate and CSCS details are the usual requests. Every applicator holds a CSCS card.

Do you work directly for building managers?

Yes. A large share of our work comes through facilities managers, managing agents and landlords. Tell us how you issue work and we will fit in.

Building owners, agents and FMs in Old Malden

Hospitality, education, healthcare, office and retail clients book us directly too. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.

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.

When to call us in Old Malden

A good share of the joints we inspect were topped up instead of being renewed. Fresh sealant won’t stick to the old bead underneath so it soon peels and traps moisture against the joint. Getting back to a clean joint then means removing every layer.

It’s worth sending us details if you spot any of the following:

  • Damp patches where an external joint has failed
  • A top-up bead over failed sealant, now lifting
  • Gaps behind commercial kitchen worktops and sinks
  • Expansion joints with the sealant torn out

Occupiers with premises at both Beverley Trading Estate and Shannon Commercial Centre could have the sealant at each handled under one quote.

Before you book anyone

  • Will failed sealant be removed rather than covered?
  • How long is the guarantee, and what does it include?
  • What level of public liability insurance do they hold?
  • Their pre-qualification and accreditations

How to choose a sealant contractor

Looking after the joints

Your facilities or cleaning team can help the joints last. Share these points with them:

  • Have extract fans checked so wet areas dry out
  • Respect the cure time before reopening an area
  • Make sure contractors see the asbestos survey before cutting out old mastic
  • Log reseals in the O&M or maintenance records

Give fresh sealant time to cure before it’s cleaned, wetted or walked past. Cure time varies with the product, conditions and depth of the joint. Keeping signs or barriers up until then protects the finish.

An open joint in a food area or toilet collects dirt and moisture that cleaning can’t reach. Cleanability is something environmental health officers pay attention to.

What Old Malden’s businesses ask us to seal

The 2 miles around Old Malden include 14 care or nursing homes. In care settings, a neat joint at a kitchen worktop or a lounge window is part of keeping the place easy to clean. Old Malden has a number of hotels close by, all within 2 miles. Hotel refurbishments are where a matched sealant colour earns its place: bathroom, bar and reception joints have to sit with the finishes, with rooms done in turn while the rest stay let.

Trade counters and showrooms on estates such as Beverley Trading Estate, 2.1 miles east of Old Malden, need neat joints where clients see them. For premises near Tolworth station, which lies west of Old Malden, footfall is part of the plan: work is phased so shops and offices keep trading.

Old Malden is about 2 miles north-west of Ewell, in Greater London. Commercial clients in Old Malden can call on us for sealant joints, as part of our coverage of Greater London. Across Greater London, 764 places are covered, Old Malden among them. Sites around London have their own page, roughly 11 miles from Old Malden.

Postcode districts covered here: KT19, KT4 and KT5 for sealant joints. Streets here include Curtis Road, Rowden Road and Grafton Road, and sites on any of them can send details for a fixed quote. Sites close to Old Malden are covered too, including Worcester Park (1 mile east), Tolworth (1 mile north-west), Stoneleigh (1 mile south-east), Berrylands (1 mile north-west) and Chessington (2 miles south-west). A short drive away, we cover London (11 miles north-east), City of Westminster (11 miles north-east), Marylebone (11 miles north-east), Kensington (9 miles north), St Pancras (12 miles north-east) and Shoreditch (13 miles north-east).

Local landmarks in Old Malden

Recent enquiries here include premises near Hogsmill LNR, Richard Challoner School and The Plough Inn Public House. The closest station to Old Malden is Tolworth station, about 0.5 miles west. Well-known places in the area include Tolworth Hospital (0.9 miles west) and Cockney Museum (1.3 miles south-east). Green spaces nearby include Tolworth Court Farm Fields and The Lake.

Map of Old Malden © OpenStreetMap contributors
Accreditations

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