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

Sealant specialists in Coolham

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

  • Mouldy silicone around WCs, urinals and vanity tops
  • Expansion joints with the sealant torn out
  • Smeared sealant across finishes from a rushed job
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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
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
CHAS & Constructionline
£5m public liability

Commercial sealant contractors for businesses in Coolham

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

Commercial sealant contractors in Coolham

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 a backing rod limits the depth to give the sealant room to work. The enquiries we see most involve gaps behind commercial kitchen worktops and sinks and layers of sealant, all of them failing, across window and door perimeters, floor and threshold joints and movement joints in walls and floors. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, the work in Coolham is the same: the right product in a properly prepared joint.

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

Commercial sealant work around smaller places like Coolham tends to mean pubs and restaurants, halls, farm shops and offices in converted farm buildings. Each has kitchens, washrooms and frames whose joints need renewing in time.

Work we carry out in West Sussex comes with a 12-month guarantee. Should something we installed fail, give us a call on 01277 525 020 or send details through our quote form and we will come back to it.

Location
Coolham (RH13)
Region
West Sussex
Cover
12 months on every job
Quotes
Quoted before any work starts
Telephone
01277 525 020
Updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Sealant on show in Coolham’s commercial buildings

Coolham 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. At about 37 miles from central London, Coolham is within reach of the capital. This part of the South East is dense with business parks and out-of-town offices. Multi-site occupiers here often want one sealant contractor across all their buildings.

On a business park such as Rosier Commercial Centre, which lies north-west of Coolham, sealant work tends to follow fit-outs: receptions, tea points, washrooms and frame perimeters. A business with units at Rosier Commercial Centre and Gillman's Industrial Estate needn’t use two contractors for its sealant.

Coolham is about 6 miles south-west of Horsham, in West Sussex. Commercial clients in Coolham use us for work on sealant joints. 373 places across West Sussex fall within our area, Coolham among them. We also cover Brighton, some 16 miles away.

Commercial sites across RH13 are covered for sealant joints. If your site is on Coolham Road and West Chiltington Lane or close by, send details and we will quote for sealant joints. We also cover Goose Green (3 miles south), Gay Street (3 miles south-west), Adversane (3 miles west), North Heath (3 miles west) and West Chiltington (3 miles south-west). Nearby towns on our patch include Crawley (12 miles north-east), Horsham (6 miles north-east), Worthing (12 miles south), Haywards Heath (13 miles east), Burgess Hill (12 miles east) and Littlehampton (14 miles south-west).

Local landmarks in Coolham

Locally, jobs take us to sites close to The Selsey Arms Public House, among other places. The closest station to Coolham is Billingshurst station, roughly 2.4 miles north-west. A little further out are Christs Hospital School Museum (3.9 miles north-east). For a walk, there’s Knepp Wildland.

Map of Coolham © OpenStreetMap contributors

On site: what to expect

The first thing on site is a walk round with your contact, to confirm the scope, the order of work and any areas we must keep clear. Then we strip out anything that has failed, prepare every joint and seal it. For a building around Coolham, tell us how to find it and who will meet us. Add it to your enquiry and we’ll build it into the plan.

  1. We start with the evidence: photographs, drawings or a look on site.
  2. A fixed quote follows, with removal and preparation included.
  3. We agree the order of work, access windows and site hours with you.
  4. The failed sealant comes out and the faces are prepared, with primer where required.
  5. Backing goes in, the new sealant is laid and tooled, and the area is left neat.
  6. Completed areas are signed off with you under our 12-month guarantee.

Before we start on site

  • Tell us your opening times and when work is allowed
  • Let us know about inductions and permits
  • Confirm the product named in the specification

Request a quote

Photos, drawings or a schedule of the joints and a fixed quote comes back to you. Where a site visit makes more sense, we will arrange one.

Get a price

Read more

For managing agents and facilities managers

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.

Hotels, schools, healthcare sites, offices and retail units book us directly too. We plan around the way the building is used, so the building keeps working while we do.

What sealant work can’t fix

Our job is the joint, not everything around it. On its own, sealant can’t deal with:

  • Faulty windows rather than failed perimeter sealant
  • Leaks from pipework, wastes or valves (that’s plumbing)
  • Old mastic that tests positive for asbestos

If in doubt, give us a call on 01277 525 020 or send details through our quote form and we’ll say what we think before you book.

Where we work in Coolham

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

When to call us in Coolham

If sealant tears through its centre, it has failed cohesively. That normally 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. Replacing it like for like rarely holds, so width, depth and product are checked before we quote.

Most enquiries start with something like this:

  • Untidy joints in a reception, shop floor or lobby
  • Layers of sealant, all of them failing
  • Black mould through washroom sealant that won’t clean off
  • Movement joints packed with grit and debris

Premises within reach of Billingshurst station, 2.4 miles to the north-west of Coolham, often have busy frontages where joints are seen by everyone passing.

What your quote should include

  • How they handle RAMS and site documents
  • Are they CHAS accredited or on Constructionline?
  • Who will actually carry out the work
  • Is depth set with backing rod, or bond-breaker tape in shallow joints?

Choosing a commercial sealant contractor

Your questions answered

Can you work at a site such as Rosier Commercial Centre, by Coolham?

Yes. We cover Coolham and the area around it, including industrial estates, business parks and retail parks such as Rosier Commercial Centre. To start, just call 01277 525 020 or email a schedule or drawings with the unit, the joints involved and your access times.

Can you supply sealant in our brand colour for a site in Coolham?

Yes, we can typically get close to most finishes from the product’s colour range. Available colours for the product are confirmed with the quote.

Is failed sealant stripped out, or sealed over?

Every failed bead is cut out completely. New sealant can’t grip the old bead, so laying over it never lasts.

How long does a typical visit take?

That varies with the scale of the job, though a typical visit usually takes a few hours to several days on most single sites, depending on joint lengths and access. Larger or phased jobs take longer, and we’ll give you a timescale with the quote.

Do you hold CHAS accreditation?

Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.

How long will the new sealant last?

It depends on movement, UV and weather, cleaning, traffic and the product. Sealant joints are maintenance items, so inspect them regularly.

Will you just go over the old sealant?

No. Sealing over old material is one of the classic causes of early joint failure, so it all comes out first.

When to bring in a specialist

For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class.

Some joints are best left to specialists: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong usually costs more in the end than doing them right.

Keeping the joints sound

Regular inspection catches problems early. Specifically:

  • Add sealant to the planned maintenance inspection list
  • Ask cleaners to use a soft cloth and mild cleaner on sealant
  • Make sure ventilation in wet areas is switched on and working
  • Keep a record of which joints were resealed and when

Brief your cleaning team on the joints that have been resealed. Abrasive pads, scrapers and some strong chemicals damage sealant surfaces; a mild cleaner is all most joints need.

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

Accreditations

Trusted. Accredited. Insured.