Commercial sealant contractors in Crawley, West Sussex
We carry out sealant work for offices, shops, hotels and other commercial buildings in Crawley and the surrounding area. Send details for a fixed quote.
- Black mould through washroom sealant that won’t clean off
- External beads that have gone brittle and cracked
- Messy, uneven beads from earlier work that let the building down
Commercial sealant contractors across Crawley
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
When to call us in Crawley
Every sealant joint is a maintenance item. Its life comes down to movement, UV and weather, how it’s cleaned, how much traffic passes it and what was used in the first place. In commercial buildings those factors tend to act together.
Site and facilities staff are often the first to spot these:
- Window and door perimeter joints that have cracked open
- Black mould through washroom sealant that won’t clean off
- A top-up bead over failed sealant, now lifting
- Hardened, chalky sealant on south-facing or exposed elevations
Industrial estates such as Denvale Trade Park (less than half a mile north-east of Crawley) have offices, trade counters and welfare areas whose sealant ages like any other building’s.
What your quote should include
- Whether their applicators hold CSCS cards
- Their plan for phasing and protecting the area
- What site paperwork they can supply
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
Sealant applicators in Crawley
Mastic Doctor has been sealing joints for businesses and contractors since 2005, and the paperwork side is in order: we are CHAS accredited and a Constructionline member, our applicators hold CSCS cards, and we carry five million pounds of public liability insurance. Let us know which site documents you need and they’ll be confirmed with the quote. Most enquiries involve frame sealant that has cracked, shrunk or pulled away and a top-up bead over failed sealant, now lifting, across movement joints in walls and floors, external facade joints and floor and threshold joints. A single leaking joint is often how a building in Crawley 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.
Quotes for commercial sealant in Crawley can come from photos and a joint schedule, or from a walk-round, with the scope listed so everyone knows what’s included.
A large place such as Crawley tends to have every kind of commercial building: offices on business parks, shopping centres and retail parks, hotels and healthcare buildings. For anyone looking after more than one of them, one contractor and one point of contact for the sealant keeps things simple.
We stand by our work: 12 months, guaranteed. It covers how we prepared and applied the sealant.
- Where
- Crawley (RH10, RH11, RH12, RH6)
- Region
- West Sussex
- Cover
- A 12-month guarantee
- Quotes
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
What the job involves on each surface
Washrooms and toilets
Black sealant in a toilet block is normally beyond cleaning. The lasting answer is removal, preparation and a new sanitary bead, room by room if that suits the building.
Window and door perimeters
The perimeter joint between a frame and the structure keeps rain out of the reveal. Failed perimeters are cut out and cleaned, backing goes into deeper gaps, and the joint is resealed with a low-modulus neutral-cure silicone or another suitable product.
Commercial sealant contractors in Crawley: the local picture
There are a good number of hotels within about 2 miles of Crawley. In hotels, sealant shows everywhere, from bathroom joints to reception counters, so colour and a clean finish matter. At least three named trading, business or retail sites lie within about 3 miles of Crawley. Units on sites like these change tenants and get refitted, and each refit leaves joints to seal.
Units at places like County Mall, under half a mile north-east of Crawley, are refitted as brands change, and the joints have to suit each new scheme. Shops and cafés around stations like Crawley station (to the north-east of Crawley) trade from early, so work is timed around them.
Crawley is about 27 miles south of London, in West Sussex. Anywhere in RH10, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. We work across 373 places in West Sussex, large and small. For work in that direction, see our Brighton page, about 19 miles away.
We cover the RH10, RH11, RH12 and RH6 postcode districts for sealant joints. Buildings on Station Road, Queens Square and High Street are within our area. Being close to the A23 and A264, Crawley is easy to get to with materials and equipment. Close to Crawley, our area also takes in Southgate (1 mile south-west), Tilgate (1 mile south-east), West Green (1 mile north), Three Bridges (1 mile east) and Langley Green (1 mile north). Further afield, our area takes in Horsham (7 miles south-west), Haywards Heath (9 miles south-east), Burgess Hill (11 miles south), East Grinstead (8 miles east), Billingshurst (13 miles south-west) and Roffey (5 miles south-west). Crawley is one of the busier places in West Sussex, and we take on sealant joints for its commercial and public buildings.
Near you in Crawley
In Crawley, that means premises near Tilgate Park, St Wilfrid's Catholic School and St Francis of Assisi Catholic Primary School and the streets around them. There’s a railway station in Crawley itself: Crawley station. Nearby you’ll also find Crawley Hospital (0.5 miles north-west) and County Mall (under half a mile north-east). Green spaces nearby include Tilgate Lake.
What sets the cost
A fixed quote reflects the actual work. It takes account of:
- Quantities, in metres or numbers
- How much existing material needs removing
- Which sealant the job calls for
- Working within restricted access windows
Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.
What to include in your enquiry
A few photos plus some basic facts will normally do. It helps to include:
- Photos of the joints, close up and from further back
- What the building is and how it’s used
- How the joints are reached, and at what height
- Whether an asbestos survey exists
Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we’ll fill any gaps with a visit.
FAQs: Crawley
Can you supply sealant in our brand colour for a site in Crawley?
Yes. Colour matching to frames, cladding, stone and shop-fit finishes is a regular part of the work. Send colour references or photographs and we will confirm what’s available for the product.
Will you take on work at estates like Denvale Trade Park, close to Crawley?
Yes. Estates, retail parks and business parks around Crawley, Denvale Trade Park among them, are all within reach. To start, just phone 01277 525 020 or email us with the unit, the joints involved and your access times.
What do you need from us to quote?
The main factors are metres of joint, removal, access, the product and how many phases there are. To get a fixed price, send details through our quote form, or phone or email us.
Do you hold CHAS accreditation?
Yes. Mastic Doctor is CHAS accredited and a Constructionline member.
How long before the joints can be used?
Curing time varies by product, and we confirm it on the day, and flag anything to keep off until it has cured.
Does the weather affect the work?
It can, when the joints are outside. Sealant won’t bond properly to a wet or frosty joint, so we watch the forecast and rearrange outside work if we have to. Indoors, the weather is rarely a problem.
Who decides which product is used?
The specification comes first, if there is one. Without one, the joint decides: its movement, its surfaces and what it has to cope with.
On site: what to expect
On arrival, we sign in, go through any site induction and check how permits are handled. Floors, finishes and fittings next to the joints are covered before any cutting starts, and the work usually takes a few hours for one area, or a planned series of visits across a bigger building. Bigger buildings in Crawley are typically done in phases agreed with the site or facilities manager, so the building keeps working. Photos and drawings let us propose a sequence with the quote.
- First, details come to us: photos, drawings or a schedule of the areas, and a site visit is booked where it helps.
- Next comes a diagnosis and a fixed quote.
- We plan around your site hours and access windows, phasing the work where areas have to stay in use.
- Failed sealant is cut out and each joint cleaned back to sound, dry faces.
- We fit backing to the right depth, prime where specified and lay the new bead.
- We walk the completed areas with you and sign them off under the 12-month guarantee.
Before we start on site
- Let us know about inductions and permits
- Point out any areas we must not close
- Share your working hours and any access restrictions
Request a quote
Send us photographs, drawings or a joint schedule and a fixed quote comes back to you. Where a site visit makes more sense, we will arrange one.
Related advice
What sealant work can’t fix
Not every problem is a sealant problem, and we’re upfront when that’s the case. It won’t fix:
- Leaking roofs, gutters or flat-roof membranes (those need a roofer)
- Suspect materials that need testing and specialist removal
- Broken glass or blown double-glazed units
Not sure which it is? You can give us a call on 01277 525 020 or email the details over and we’ll tell you honestly.
Surfaces we seal
- Window and door perimeters
- Kitchen worktops and splashbacks
- Washrooms and tea points
- Movement joints in walls and floors
- External facade joints
- Floor and threshold joints
Towns and villages near Crawley
Other services in Crawley
Site staff or a sealant specialist?
Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
Some joints are best left to specialists: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong normally costs more in the end than doing them right.