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

Old Malden construction mastic

Need construction mastic in Old Malden? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.

  • Bath and shower joints scraped during the final clean
  • Existing joints on a refurb that need cutting out and resealing
  • Caulk cracking where joints are moving more than expected
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS & Constructionline
£5m public liability

Construction mastic near Old Malden

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

Doing it in-house

Certain joints really need a specialist: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.

For a quick touch-up, site staff may be fine, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.

About our construction mastic in Old Malden

A typical mastic package covers more than window perimeters: external door and window perimeters, internal decorators’ caulk where specified, sanitary joints in bathrooms and washrooms, kitchen worktops and splashbacks, and snagging before handover. One contractor for all of it keeps the responsibility in one place, and one applicator team gives a consistent finish. If you have a mastic package split between trades with no clear owner and cracks opening in caulked internal joints, we can help, on brick and block movement joints, window and door perimeters and internal decorators’ caulk alike. For commercial sealant work in Old Malden, you deal with one contact from quote to sign-off, whether it’s one building or several.

Construction in a London area such as Old Malden means working on constrained sites: limited storage, booked deliveries and access shared with other trades. We fit around the programme, sealing each elevation or floor as other trades hand over.

Every job ends the same way: guaranteed. Our workmanship is backed for 12 months, and we explain exactly what that covers when we quote.

The Mastic Doctor team beside their liveried vans in front of an office building
Where
Old Malden (KT19, KT4, KT5)
Region
Greater London
Guarantee
12 months on our workmanship
Price
Quoted before any work starts
Phone
01277 525 020
Page updated
3 November 2026

What sealant work can’t fix

We check first that sealant really is the fix. It isn’t the answer for:

  • Glazing units that are cracked or misted
  • Frames fitted out of tolerance
  • Deciding which fire-stopping product a penetration needs

If in doubt, speak to us on 01277 525 020 or email us and we will say what we think.

Joints and surfaces we work on

  • Sanitary and kitchen joints
  • Floor and skirting junctions
  • Cladding and panel joints
  • Window and door perimeters
  • Internal decorators’ caulk
  • Brick and block movement joints

Owners, agents and contractors

We work for building owners and managing agents on everything from one building to a spread of sites. Several sites can go on one quote, so there’s one set of paperwork to deal with.

Agents, factors and owners’ representatives all follow the same route: send the details, accept a fixed quote, and we carry out and guarantee the work. We can agree access arrangements and keyholder contacts beforehand.

Construction mastic in Old Malden: the local picture

A 2-mile radius around Old Malden takes in a number of hotels. When hotels extend or refit, the work is normally squeezed between peak periods, mastic included. As part of Greater London, Old Malden is inside the ULEZ, which applies to every van on site. London sites also mean booked deliveries and limited storage, which the mastic programme has to allow for.

Work at a hotel such as Orchid Epsom Hotel, 0.9 miles to the south-east of Old Malden, tends to be programmed around bookings, mastic included. For contractors at a college like Hillcroft College, which lies north-west of Old Malden, perimeters and internal sealant are timed for the holidays.

Old Malden is about 2 miles north-west of Ewell, in Greater London. We cover commercial sites throughout Old Malden, for single jobs and planned programmes alike. We work across 764 places in Greater London, large and small. Our London page has more on work in that area (11 miles or so).

Commercial sites across KT19, KT4 and KT5 are covered. Among the streets we cover are Curtis Road, Rowden Road and Grafton Road, and sites on any of them can send details for a fixed quote. If your building is just outside Old Malden, we cover 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).

Around Old Malden

We work on buildings around Hogsmill LNR, Richard Challoner School and The Plough Inn Public House and the streets around them. For rail, the closest station is Tolworth station, roughly 0.5 miles west of the centre. Well-known places in the area include Tolworth Hospital (0.9 miles west) and Cockney Museum (1.3 miles south-east). Open spaces near Old Malden include Tolworth Court Farm Fields and The Lake.

Map of Old Malden © OpenStreetMap contributors

Common problems we fix in Old Malden

Wide, tapered or inconsistent gaps around frames are a common problem. Every product has limits on how wide a joint it can bridge and gaps beyond it need packing or adjusting by the frame installer. We flag them early rather than filling them with sealant that won’t last.

If one of these sounds familiar, it’s time for a closer look:

  • Internal caulk splitting as the building dries out
  • Window and door perimeters that won’t pass inspection
  • Existing joints on a refurb that need cutting out and resealing
  • Sanitary sealant damaged by following trades

When units on a site such as Beverley Trading Estate, 2.1 miles to the east of Old Malden, are refurbished or reclad, the panel joints and window perimeters are part of the mastic package.

Before you book anyone

  • Will CSCS-carded applicators be on site?
  • Will RAMS and insurance details be available?
  • What level of public liability insurance do they hold?
  • Their pre-qualification and accreditations

Questions to ask before you appoint anyone

How the job changes by surface

Bathrooms, en suites and washrooms

In bathrooms and washrooms, an anti-mould sanitary silicone goes around every fitting. Each joint is prepared, sealed and finished with a neat tooled line and baths are loaded where appropriate before sealing.

Window and door perimeters

Frames sealed into the opening keep rain out of the reveal. We use the specified perimeter sealant, usually a low-modulus neutral-cure silicone, with backing rod in deeper gaps.

Our process

Occupied buildings need a little choreography. We sign and contain the area we are in, 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 Old Malden starts with access: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Send the building rules and access times with your enquiry.

  1. First we take quantities off the drawings and read through the specification.
  2. You receive a fixed quote listing scope, products and phasing.
  3. Any site paperwork you need (RAMS, insurance certificate, CSCS details) is confirmed with the quote.
  4. Work follows the programme, area by area, as rooms and elevations become ready.
  5. Every joint is prepared, set to depth and sealed with the specified product.
  6. Snags are cleared before handover and completed areas carry our 12-month guarantee.

Preparing the site

  • Make sure the joints can be reached
  • Tell staff and tenants when we’ll be in
  • Send asbestos survey details if the building is pre-2000

Quotes

Pricing a project or setting a maintenance budget? We will quote against your scope and drawings you can plan around. For a chat about it beforehand, speak to us on 01277 525 020 or email the details over.

Get a price

Advice

Your questions answered

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

Yes. Inductions, permits and timed loading are routine for us in London. The building manager’s rules go straight into our method. We allow for the ULEZ, which covers every borough

Will you plan work around the academic year at somewhere like Kingston University?

Yes. Tell us the term dates, vacation periods and access windows, and we’ll plan the work around them. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

When can you be on site?

We are in the office from 8am until 5pm, Monday to Friday. Let us know your site hours and access windows, and the work will be planned around them.

Do you guarantee new-build sealant work?

The work is guaranteed for 12 months on the workmanship. Protecting sealed areas from following trades helps avoid damage.

How do we ask for a quote?

The quote form is the simplest route, though you can also call the office on 01277 525 020 or email a schedule or drawings. Photos, drawings or a joint schedule help us quote quickly.

What happens if the weather stops external sealing?

External sealant needs a dry joint and a temperature within the product’s range. Frosty or damp mornings can hold up external sealing.

What will the job cost?

That depends on the job: quantities, access, the product and any phasing. Call for a quote.

Accreditations

Trusted. Accredited. Insured.