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

Commercial Sealant Contractors in Bankside

Planning work on a sealant joint in Bankside? We look at it, seal it with the right product and hand it over with a 12-month guarantee.

  • Greasy, split joints in a kitchen or tea point
  • Untidy joints in a reception, shop floor or lobby
  • Frame sealant that has cracked, shrunk or pulled away
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS accredited
£5m PL insurance

Need commercial sealant contractors in Bankside?

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

Signs you need commercial sealant contractors in Bankside

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.

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

  • Frame mastic that has hardened and come away from the wall
  • Leaks that seem to come through a sealant line
  • Mouldy silicone around WCs, urinals and vanity tops
  • Shrunken sealant along kitchen worktops and splashbacks

A hotel such as Bankside Hotel, under half a mile to the south-west of Bankside, shows how much sealant a hospitality building has on show, from bathroom joints to the bar.

What your quote should include

  • Their pre-qualification and accreditations
  • Their approach to joint depth and backing
  • How long is the guarantee, and what does it include?
  • Their plan for phasing and protecting the area

Our contractor checklist

About our commercial sealant contractors in Bankside

Sealant joints are easy to overlook until one lets water in, and in an occupied building failure normally announces itself as a stained ceiling or an unhappy tenant. Mastic Doctor works as a commercial sealant contractor for facilities managers, managing agents and main contractors looking after property in Bankside. We find out why the sealant joints failed, take them out and seal again using a sealant that suits the joint. If you are dealing with smeared sealant across finishes from a rushed job and water staining near frames, panels or ceilings, we can put it right. Most enquiries from Bankside start with one failed joint and grow into a wider look at the building: we look at the rest while we’re there and tell you what we find.

If you look after more than one building near Bankside, the work can be planned as one programme, so standards and paperwork match across every site.

In London, most commercial sealant work happens in buildings that stay open: offices with staff at their desks, shops trading below flats and receptions that can’t be roped off for long. Work is split into zones agreed with the building or facilities manager, so the premises keep working around us.

Work we carry out comes with a 12-month guarantee. If an installation problem shows up, speak to us on 01277 525 020 or email us and we’ll arrange a return visit.

Mastic Doctor team members lined up next to their branded vans outside an office building
Where
Bankside (SE1, EC4Y, EC4V)
Region
Greater London
Cover
12 months on every job
Price
Fixed quote, scope in writing
Phone
01277 525 020
Last updated
3 November 2026

Our process

Inspect, seal, sign off: that’s the shape of every visit. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and we finish with a walk round so the work can be signed off. In Bankside, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.

  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. Old sealant is cut out completely, never sealed over.
  5. A suitable product for each joint goes in at the right depth and is tooled.
  6. We check the work with you, and the 12-month guarantee starts.

What we need from you

  • Let us know about inductions and permits
  • Send any specification or drawings in advance
  • Send your site hours and access windows

Get a fixed quote

Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we will return a fixed quote that you can work with. For a chat about it beforehand, ring 01277 525 020 or email the details over.

Ask for a quote

Related advice

Work for main contractors and building owners

For main contractors, we work as the sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.

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.

Why deal with it now?

A failed seal around a window, worktop or panel doesn’t mean the element itself has to go. In many cases the element is fine and only the seal around it has given up. A careful reseal is a far smaller undertaking than replacement. In a London building, a failed joint rarely affects only one party. Dealing with it early is simpler for everyone.

There’s no price list, because the scope varies so much from one building to the next. For a fixed figure, call for a quote.

Why appoint us

  • CSCS-carded applicators
  • RAL and finish matching where the product range allows
  • A range of standard colours, depending on the product
  • Joints cleaned back to sound surfaces

Read how commercial sealant jobs are priced and our accreditations and insurance.

Commercial sealant contractors around Bankside: points for this area

Bankside has a good number of hotels close by, all within 2 miles. A hotel refurbishment is full of joints that guests will see, and a matched colour keeps them discreet. In London, commercial buildings often have managed loading bays, goods lifts and permit-to-work systems. We work within them, one zone at a time.

Sites a few miles apart, such as Grand Vitesse Industrial Estate and Southwark Bridge Business Centre, can share one programme and one point of contact. A unit on an estate like Grand Vitesse Industrial Estate, under half a mile to the south of Bankside, typically has an office front, a trade counter and staff facilities with joints of their own.

Bankside is about 1 mile north of London, in Greater London. Looking for commercial sealant contractors in Bankside? We can help, as we do across Greater London. Bankside is one of 764 places we cover in Greater London for sealant joints.

Work on sealant joints is covered throughout SE1, EC4Y and EC4V. If your site is on Bear Lane, Bush Lane and Swan Lane or close by, we can quote for sealant joints. You’ll find Bankside on or near the A201 and A300, so getting applicators and materials to site is simple. If your building is just outside Bankside, we cover Blackfriars (1 mile north-west), Temple (1 mile north-west), Temple Bar (1 mile north-west), Waterloo (1 mile south-west) and Smithfield (1 mile north). A short drive away, we cover Kensington (4 miles west), Walthamstow (6 miles north-east), Hampstead (5 miles north-west), Ruislip (14 miles west), Brompton (3 miles west) and Stockwell (3 miles south).

Landmarks near Bankside

In Bankside, that means premises near St Mary-at-Hill, Bernie Spain Gardens and St Andrew's and St John's Church of England Primary School, among other places. Nearby too are Barts Health Archives (0.6 miles north), The Cathedral School of St Saviour and St Mary Overy (0.5 miles south-east) and Founders Arms (under half a mile west). Bankside has its own railway station: London Blackfriars station. A little further out are Royal Waterloo Hospital for Children and Women (0.6 miles west) and Gabriel's Wharf (under half a mile west). The countryside around Bankside includes Ludgate Hill and Barnsbury Wood.

Map of Bankside © OpenStreetMap contributors

Bankside: questions and answers

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. Send the building rules and access times with your enquiry.

Does your area include sites such as Grand Vitesse Industrial Estate, near Bankside?

Yes. Estates, retail parks and business parks around Bankside, Grand Vitesse Industrial Estate among them, are all within reach. To start, just ring 01277 525 020 or use the quote form with the unit, the joints involved and your access times.

When can the area be used after sealing?

Curing time varies by product, and we confirm it on the day.

How do you choose the sealant?

A specification, where there is one, decides it. Without one, the joint decides: its movement, its surfaces and what it has to cope with.

Do you hold CHAS accreditation?

Yes. We are CHAS accredited and a Constructionline member, which helps with supplier vetting.

Is the old sealant taken out first?

The old bead is stripped out first. After that come cleaning, primer where needed, backing and the new sealant.

How do we get a quote?

The main factors are metres of joint, removal, access, the product and how many phases there are. To get a fixed price, send details through our quote form, or phone or email us.

General trades versus a specialist

Using site staff can make sense for a small touch-up, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.

Certain joints really need a specialist: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong normally costs more in the end than doing them right.

Maintenance after handover

Keep the joints in good shape with a few simple steps:

  • Keep abrasive pads and scrapers off resealed joints
  • Log reseals in the O&M or maintenance records
  • Make sure contractors see the asbestos survey before cutting out old mastic
  • Deal with small splits before they become leaks

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.

Sealant installed at the same time typically fails in sequence. The first failures are often a warning about the rest, so it makes sense to look at the wider elevation or block. We can assess the lot and suggest what to do now and later.

Accreditations

Trusted. Accredited. Insured.