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

Sealant applicators in Downside

Sealant work for offices, shops, hotels and other commercial buildings throughout Downside and nearby, by CSCS-carded applicators. Fully insured and CHAS accredited.

  • Hardened, chalky sealant on south-facing or exposed elevations
  • Gaps behind commercial kitchen worktops and sinks
  • Messy, uneven beads from earlier work that let the building down
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
London, the South East & Scotland
Constructionline member
£5m public liability

Commercial sealant contractors in Downside

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

Questions we’re asked in Downside

Do you offer colour-matched sealant for buildings in Downside?

Yes, sealants come in a wide range of standard colours, and matching to RAL references, cladding, stone or frames is a common request. Send colour references or photos and we will confirm what’s available for the product.

Does your area include sites such as Bookham Industrial Estate, near Downside?

Yes, sites like Bookham Industrial Estate are within our area, along with the rest of Downside. To start, just ring 01277 525 020 or use the quote form with the unit, the joints involved and your access times.

How do you keep disruption to occupiers down?

We phase the work so parts of the building stay open. Tell us your site hours and access windows and we’ll plan around them.

Will you just go over the old sealant?

No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.

How soon can the area be used again?

The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.

Will your applicators have CSCS cards?

Yes. Our applicators hold CSCS cards, as many construction sites ask for.

What site paperwork can you provide?

We confirm documents at quote stage: RAMS, an insurance certificate and CSCS details are the usual requests. Every applicator holds a CSCS card.

How we handle commercial sealant contractors in Downside

A reseal stands or falls on the preparation underneath it. Old silicone gives new sealant nothing to grip, so every trace of it is removed. Where the sealant maker specifies a primer for that substrate, it goes on before the new bead and the joint depth is controlled with backing rod. The enquiries we see most involve smeared sealant across finishes from a rushed job and greasy, split joints in a kitchen or tea point, across external facade joints, washrooms and tea points and floor and threshold joints. A single leaking joint is often how a building in Downside first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.

In Downside, as anywhere, the first joints to go are normally the ones that work hardest: south-facing perimeters, entrance thresholds and busy washrooms.

Business units in the countryside around places like Downside are often converted barns, stables or farmyards. Their mix of old walls with new frames, partitions and floors means many joints between unlike materials.

Our 12-month guarantee is about workmanship, not wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we spell out the cover before we begin.

The Mastic Doctor team standing beside their branded vans outside an office building
Place
Downside (KT11)
Region
Surrey
Cover
12 months on our workmanship
Quote
Quoted before any work starts
Call
01277 525 020
Page updated
3 November 2026

Quoting for work in Downside

Each job is priced on its own details. The main factors are:

  • The size and state of each joint
  • Phasing around occupants
  • Specialist products, such as fire-rated or hygienic sealants
  • Travel to remote or island sites

What a job costs comes down to the quantity of joints, what has to come out first and how the joints are reached. Call for a quote when you’re ready.

Before you send an enquiry

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

  • Access details, including height
  • Photos of the joints, close up and from further back
  • Rough lengths or quantities, or drawings if you have them
  • Asbestos survey details if the building is older

Photos, drawings or a schedule of the joints and a fixed quote comes back to you. If the job needs a look first, we’ll arrange a site visit.

Frontages, fit-outs and joints in Downside

Downside sits in one of the drier corners of the country, the South East. External joints still need dry faces and the right temperature, and damp or frosty mornings can hold work up. Central London is about 19 miles from Downside. The South East around the capital has large numbers of business parks, offices and retail centres, especially around the motorway corridors. Firms with branches across the South East can use one contractor for every site.

Offices and shops close to stations such as Cobham & Stoke Dabernon station, 1 mile north-east of Downside, tend to be busy all day, so sealant work is planned around opening hours. If you run a unit on an estate such as Bookham Industrial Estate, which lies south-east of Downside, the trade counter, offices and staff facilities have joints to look after as well as the warehouse.

Downside is about 4 miles west of Leatherhead, in Surrey. Commercial clients in Downside can call on us for sealant joints. Our Surrey coverage takes in 379 places, from busy centres to rural villages. Sites around London have their own page, roughly 19 miles from Downside.

If you need commercial sealant contractors in KT11, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. Among the streets we cover are Downside Common, Downsview Close and Deacon Close. We also cover Hatchford (1 mile west), Martyr's Green (1 mile south-west), Hatchford End (2 miles west), Whiteley Village (3 miles north) and Wisley (3 miles west). Nearby towns on our patch include Guildford (8 miles south-west), Woking (7 miles west), Camberley (14 miles west), Epsom (6 miles east), Horley (14 miles south-east) and Redhill (12 miles south-east).

What’s near Downside

In Downside, that means premises near The Plough Public House and Parkside School, among other places. Downside’s nearest station is Cobham & Stoke Dabernon station, about 1 mile north-east of the centre. Other landmarks nearby include Epsom Cottage Hospital (5.1 miles north-east) and Send and Ripley History Society Museum (3.8 miles west). For a walk, there’s Jubilee Wood and Boldermere Lake.

Map of Downside © OpenStreetMap contributors

Surface by surface

Movement joints in walls and floors

A trafficked floor joint needs a different product from a wall joint. We’ll recommend the right filler or sealant for the traffic and movement, and tell you if the edges need repairing first.

Fire-rated seals where specified

Not every penetration suits a sealant. Other products, such as collars, wraps and batts, are specified for different services, and we’ll tell you if the detail calls for something else.

Honest limits

Being straight saves everyone time. Fresh joints won’t solve:

  • A failed roof covering or waterproofing membrane
  • Walls or slabs moving more than any sealant can take
  • Broken glass or blown double-glazed units

Not sure which it is? You can call 01277 525 020 or send photos by email and we will tell you honestly before you book.

Where we work in Downside

  • Floor and threshold joints
  • Movement joints in walls and floors
  • External facade joints
  • Washrooms and tea points
  • Window and door perimeters
  • Kitchen worktops and splashbacks

Keeping the joints sound

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

  • Make sure contractors see the asbestos survey before cutting out old mastic
  • Look at the sealant around anything that has been moved or replaced
  • Ask cleaners to use a soft cloth and mild cleaner on sealant
  • Keep barriers up until the new sealant has cured

New joints need their full cure time before they take water, cleaning or traffic. Cure time varies with the product, conditions and depth of the joint, so we confirm it for each area at handover. Keeping signs or barriers up until then protects the finish.

Sealant installed at the same time normally fails in sequence. A few splits this year normally mean more next year, 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.

Our process

When we get to site, we report to your site contact and complete whatever induction the building runs. Floors, finishes and fittings next to the joints are covered before anything is cut or cleaned, and the work normally takes part of a day on a small job and longer where several buildings or phases are involved. Smaller jobs around Downside can be grouped with others nearby, which keeps travel down. You will have a fixed quote before work starts.

  1. First, details reach us through the quote form or a site visit.
  2. We diagnose the cause of failure and price a fixed scope.
  3. Work is phased around your occupiers where areas need to stay in use.
  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. We check the work with you, and the 12-month guarantee starts.

Preparing the site

  • Send any specification or drawings in advance
  • Arrange parking or a loading space
  • Let building users know which areas are affected

Getting a fixed quote

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to phone 01277 525 020 or email drawings and photos with what you know.

Get a quick quote

Advice

Why act early in Downside

Some low prices are low because nothing gets cut out. New sealant laid on old silicone has nothing to bond to, so it peels. Our prices always include removal of the failed bead and full joint preparation, which is where the lasting value is. Older rural buildings around Downside move with the seasons, and rigid or tired sealant can’t keep up. The right product, sized to the joint, copes much better.

A quote for sealant joints depends on quantities, condition and access, and any specification that applies. Call for a quote.

Why us?

  • Colours chosen to suit frames, cladding or finishes where possible
  • One phone line for London, the South East and Scotland
  • CSCS-carded applicators
  • Coloured sealants to suit the setting, where available

Take a look at what affects the cost or our accreditations.

Accreditations

Trusted. Accredited. Insured.