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

Industrial and floor joint sealing in Cannon Hill, Greater London

Floor joint sealing and filling in warehouses, factories and industrial units across Cannon Hill, by CSCS-carded applicators. Fully insured and CHAS accredited.

  • Untidy open joints in a retail unit
  • Trucks and loads jolting over damaged joints
  • Soft sealant dragged out of trafficked joints
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
CHAS accredited
£5m PL insurance

Floor joint sealing for Cannon Hill sites

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

Our process

Before we leave any area, the masking comes off, the area is cleaned and every joint is checked. Where the sealant needs time to cure before use, we tell you and sign the area. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. Let us know about any on-site parking or loading arrangements when you send the job details.

  1. First, the zones and order of work are agreed with you.
  2. We point out joints whose edges need repairing first.
  3. Failed material and debris are removed and the joint cleaned.
  4. The chosen filler or sealant goes in flush with the slab.
  5. Each area is handed back when ready for traffic.

What we need from you

  • Send asbestos survey details if the building is pre-2000
  • Make sure the joints can be reached
  • Arrange parking or a loading space

Request a quote

A handful of photographs and a postcode is the fastest way to a quote. Upload them with the quote form, or give us a call on 01277 525 020 or send photos by email to discuss it first.

Get a quick quote

Advice

About our floor joint sealing in Cannon Hill

Sometimes the concrete either side of a joint has already spalled. A filler laid against broken edges has nothing sound to grip, so if the edges need repair before any filling, we’ll say so and explain how it affects the programme. We work on joints along racking aisles, construction joints and saw-cut induced joints, and what we’re called in for most is flexible sealant torn out by wheels and a rough ride across broken joints. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Cannon Hill, that means joint design, primers and backing rod as standard.

Most London buildings can’t shut a car park, loading bay or warehouse floor for long. We work through joints a section at a time, closing small areas in turn.

The 12-month guarantee covers our workmanship: preparation, application and finish. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.

Location
Cannon Hill (SW20, SM4, KT3)
Region
Greater London
Cover
12 months on every job
Quotes
Quoted before any work starts
Phone
01277 525 020
Page updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Work for main contractors and building owners

Whether you’re a managing agent, a property factor or an owner’s representative: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.

For main contractors, we work as the sealant subcontractor, on new build and refurbishment alike. We work to your programme, your specification and your site rules, with CSCS-carded applicators on site.

Doing it in-house

Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.

For most general trades, sealant is a sideline. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint, which is what makes a joint last.

Warehouse floors and decks around Cannon Hill

At least three named trading, business or retail sites lie within about 3 miles of Cannon Hill. Their warehouses, yards and car parks are exactly where joints take the most punishment. Basement car parks and service yards in London tend to be in use all working day, which is why we work a few bays at a time.

Hospital campuses such as New Victoria Hospital, 1.9 miles to the north-west of Cannon Hill, grow in stages, leaving movement joints wherever new blocks meet old. Retail centres such as Priory Retail Park (2 miles north-east of Cannon Hill) have floors, service yards and car parks with joints under constant traffic. On industrial estates such as Rainbow Industrial Estate, which lies north-west of Cannon Hill, saw-cut floor joints, loading bay slabs and yard joints take the heaviest traffic.

Cannon Hill is about 1 mile north-west of Morden, in Greater London. Looking for floor joint sealing in Cannon Hill? We can help, as we do across Greater London. 764 places across Greater London fall within our area, Cannon Hill among them. Sites around London have their own page, about 9 miles away.

We cover the SW20, SM4 and KT3 postcode districts for floor joints. Streets here include Aylward Road, Camborne Road and Botsford Road, and sites on any of them can send details for a fixed quote. Close to Cannon Hill, our area also takes in Bushey Mead (1 mile north-west), Raynes Park (1 mile west), Wimbledon Chase (1 mile north), West Barnes (1 mile west) and Merton Park (1 mile north-east). Nearby towns on our patch include London (9 miles north-east), City of Westminster (8 miles north), Marylebone (9 miles north), Kensington (7 miles north), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).

Near you in Cannon Hill

Locally, jobs take us to sites close to The Edward Rayne pub, Cannon Hill Common and Harris Academy Wimbledon and the streets around them. Cannon Hill’s nearest station is South Merton station, roughly 0.5 miles north-east. Other landmarks nearby include St. Anthony's Hospital (1.5 miles south) and Wimbledon Museum (1.6 miles north). For a walk, there’s Cherry Wood and Henman Hill.

Map of Cannon Hill © OpenStreetMap contributors

What sealant work can’t fix

Before quoting, we check that sealant is the right answer. It isn’t the answer for:

  • Slab panels that rock or move under load
  • Spalled arrises, which need an edge repair first
  • A failing floor coating, which is a flooring contractor’s job

If in doubt, ring 01277 525 020 or use the quote form and we will say what we think.

Surfaces we seal

  • Joints along racking aisles
  • Saw-cut induced joints
  • Retail and showroom floors
  • Construction joints
  • Forklift and pallet-truck routes
  • Loading bays

How the quote is worked out

These are the things that shape the price:

  • The total length or number of joints
  • The size and state of each joint
  • Which sealant the job calls for
  • Induction, permit and paperwork requirements

Every site prices differently: joint size, product, access and site hours all play a part. A fixed quote follows once we understand the job.

What to include in your enquiry

To price the job accurately, we need a clear picture of the site. Send us:

  • Drawings or a marked-up plan, if available
  • The product your specification calls for
  • What the building is and how it’s used
  • A wide shot and a close-up of the area

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, call 01277 525 020 or email us.

Questions about Cannon Hill

Do you take on work at healthcare sites like New Victoria Hospital?

Yes, healthcare and care buildings are part of our work. Each area is agreed with the ward or department and the estates team in advance.

Do you work in London buildings with loading restrictions?

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. We allow for the ULEZ, which covers every borough

Why has the filler pulled away from one side?

Young concrete carries on shrinking for a long time and a stiff filler can separate down one side. It is usually dealt with by topping up.

What happens if the joint edges are damaged?

We check the edges as part of the survey. Where they have broken away, we’ll tell you before quoting the filling, so nothing is filled that won’t hold.

Will your applicators have CSCS cards?

Yes. We use CSCS-carded applicators.

Do you cover Cannon Hill?

Yes. We take on work across Cannon Hill, and the same phone number covers every area.

How soon can traffic go back on the floor?

Cure times vary with the product and the conditions. We’ll give you a time for each zone before we start.

Why it’s worth doing now in Cannon Hill

Broken joints shake trucks, stock and operators alike. That means extra wear on wheels and a rougher ride for staff, which nobody budgets for. A properly filled joint smooths the route. Failed sealant in a building in Cannon Hill can quickly affect neighbours, tenants or the floor below: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.

A quote for floor joints depends on how many there are, their condition and the access, and any specification that applies. Ask us for a fixed quote.

Why choose Mastic Doctor in Cannon Hill

  • Old sealant cut out, never sealed over
  • Public liability insurance in place
  • One number for every site we cover
  • Commercial sealant work since 2005

Read what affects the cost or our accreditations and insurance.

Accreditations

Trusted. Accredited. Insured.