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

Commercial sealant contractors in Colgate, West Sussex

Sealant work for offices, shops, hotels and other commercial buildings in Colgate and across West Sussex. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Layers of sealant, all of them failing
  • Black mould through washroom sealant that won’t clean off
  • Hardened, chalky sealant on south-facing or exposed elevations
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
Constructionline member
£5m public liability

Commercial sealant contractors across Colgate

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

Commercial sealant contractors in Colgate, done properly

We’ve applied sealant on commercial sites for over 20 years: CHAS accredited, Constructionline member, five million pounds of public liability insurance and CSCS-carded applicators. Let us know which site documents you need and they’ll be confirmed with the quote. If you’re dealing with black mould through washroom sealant that won’t clean off and external beads that have gone brittle and cracked, we can help, whatever the surface. Facilities teams, main contractors and managing agents in Colgate tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

Multi-site clients with buildings in and around Colgate can put several sites on one programme, with one quote format and one point of contact.

Business units in the countryside around places like Colgate are often converted barns, stables or farmyards. Their mix of old walls with new frames, partitions and floors means many joints between unlike materials, and a sealant colour that suits the building’s character is often part of the brief.

We stand by our work with a 12-month guarantee. It covers how we prepared and applied the sealant, and if something we did falls short, we return to it.

Mastic Doctor team members lined up next to their branded vans outside an office building
Location
Colgate (RH13, RH12)
Region
West Sussex
Cover
12 months on every job
Price
Quoted before any work starts
Phone
01277 525 020
Last updated
3 November 2026

On site: what to expect

We begin with a short walk round with whoever looks after the building, to confirm the scope, the order of work and any areas we must keep clear. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. Smaller jobs around Colgate can be grouped with others nearby, which keeps travel down. You will have a fixed quote before work starts.

  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. Each joint gets a suitable sealant, laid to depth and tooled.
  6. A final walk-round, then the 12-month guarantee applies.

Before we start on site

  • Warn occupants and staff about the work
  • Send any specification or drawings in advance
  • Let us know about inductions and permits

Getting a fixed quote

A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we will fill any gaps with a visit.

Get a quick quote

Read more

Building owners, agents and FMs in Colgate

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. Keys, access and contacts can be agreed in advance.

Hospitality, education, healthcare, office and retail clients book us directly too. The work is planned around how the building runs, so the building keeps working while we do.

Your questions answered

Is a smaller place like Colgate outside your area?

Not at all: smaller places are covered as well as towns. We work across Greater London and the South East. Where we can, we group nearby jobs to make the most of each trip.

Can you work at a site such as Holmbush Potteries Industrial Estate, by Colgate?

Yes. Our area takes in Colgate and its surroundings, with estates and business parks such as Holmbush Potteries Industrial Estate included. Photos and a short description are enough for a first look.

Does the weather affect the work?

It can, for external work. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Indoors, the weather is rarely a problem.

How soon can the area be used again?

The product and site conditions decide that. Some products skin over quickly but need longer to cure fully, so we’ll confirm the curing time on the day.

How long does a typical visit take?

It depends on the scope, but the work usually takes anything from part of a day on a short run of joints to several weeks on a large phased package. Larger or phased jobs take longer, and we will give you a timescale with the quote.

Do you work directly for building managers?

Yes. You can send details through our quote form.

Do your applicators hold CSCS cards?

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

Frontages, fit-outs and joints in Colgate

Colgate has two care or nursing homes no more than 2 miles away. Kitchens and communal rooms in care settings are cleaned constantly, so their joints need to be smooth and sound; colours can be chosen to suit the interior. Central London is about 30 miles from Colgate. This part of the South East is dense with business parks and out-of-town offices. Firms with branches across the South East can use one contractor for every site.

Shops and cafés around stations like Faygate station, 1.3 miles to the north-west of Colgate, trade from early, so work is timed around them. Industrial estates such as Holmbush Potteries Industrial Estate (to the north of Colgate) have offices, trade counters and welfare areas whose sealant ages like any other building’s.

Colgate is about 3 miles south-west of Crawley, in West Sussex. Our applicators travel to Colgate for work on sealant joints. Across West Sussex, 373 places are covered, Colgate among them. We also cover Brighton, some 18 miles away.

Business premises anywhere in RH13 and RH12 are within our area. Streets here include Forest Road, Vicarage Close and Blackhouse Road. We also cover Kilnwood Vale (1 mile north), Faygate (1 mile north-west), Broadfield (2 miles north-east), Roffey (2 miles west) and Handcross (3 miles south-east). A short drive away, we cover Crawley (3 miles north-east), Horsham (4 miles west), Haywards Heath (9 miles south-east), Burgess Hill (10 miles south-east), East Grinstead (11 miles east) and Storrington (14 miles south-west).

Near you in Colgate

In Colgate, that means premises near The Dragon pub, Target Hill Park and Cottesmore School and the streets around them. The closest station to Colgate is Faygate station, roughly 1.3 miles north-west of the centre. A little further out are Crawley Museum (3.4 miles north-east) and County Mall (3.4 miles north-east). For a walk, there’s Tilgate Lake and Warnham LNR.

Map of Colgate © OpenStreetMap contributors

Common problems we fix in Colgate

If sealant tears through its centre, it has failed cohesively. That usually means the joint stretched further than the product could cope with: a bead laid too thin, an over-stretched joint or the wrong movement class. The same product in the same joint tends to fail the same way.

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

  • Layers of sealant, all of them failing
  • Water staining near frames, panels or ceilings
  • Black mould through washroom sealant that won’t clean off
  • Hardened, chalky sealant on south-facing or exposed elevations

Sites a few miles apart, such as Holmbush Potteries Industrial Estate and New House Business Centre, can share one programme and one point of contact.

What your quote should include

  • Whether primer will be used where the manufacturer specifies it
  • Is depth set with backing rod, or bond-breaker tape in shallow joints?
  • Will RAMS and insurance details be available?
  • Will failed sealant be removed rather than covered?

Choosing a commercial sealant contractor

Quoting for work in Colgate

What shapes the price:

  • Whether old sealant has to be cut out first
  • Whether the work must be split into stages
  • Joint width, depth and condition
  • How accessible the joints are

Pricing sealant joints depends on how many there are, their condition and the access. Call for a quote.

What we need to price the job

For an accurate fixed quote, we need a clear picture of the site. Useful things to include:

  • When you need the work done
  • The type of building and who uses it
  • The site address and postcode
  • How the joints are reached, and at what height

Send us photographs, drawings or a joint schedule are often enough for a fixed quote. If the job needs a look first, we will arrange a site visit.

What we can’t put right

We seal joints; we don’t mend everything behind them. Sealant alone won’t deal with:

  • A dripping trap, valve or pipe behind a fitting
  • Suspect materials that need testing and specialist removal
  • A failed roof covering or waterproofing membrane

If in doubt, give us a call on 01277 525 020 or email the details over and we’ll say what we think.

What we seal

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

After the work

Regular inspection catches problems early. In particular:

  • Ask fit-out and M&E contractors to report any sealant they disturb
  • Have extract fans checked so wet areas dry out
  • Keep barriers up until the new sealant has cured
  • Log reseals in the O&M or maintenance records

In washrooms and kitchens, extraction makes a real difference to sealant life. Fans that are broken or switched off leave joints damp for longer, and mould follows damp. Your maintenance team can look at extract fans at the same time.

Tenants and staff spot black or split sealant quickly. Planned replacement saves fielding the same complaint again and again.

Accreditations

Trusted. Accredited. Insured.