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

Commercial Sealant Contractors in Sidlesham

Commercial sealant contractors in Sidlesham, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.

  • Shrunken sealant along kitchen worktops and splashbacks
  • Black mould through washroom sealant that won’t clean off
  • Untidy joints in a reception, shop floor or lobby
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
12-month guarantee on our workmanship.
London, the South East & Scotland
CHAS accredited
Fully insured: £5m PL

Commercial sealant contractors near Sidlesham

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

Sidlesham: questions and answers

Does a coastal location like Sidlesham affect which sealant is used?

It can, yes: buildings near the sea take more wind-driven rain, and salt in the air nearer the shore. That puts more weight on product choice, primers where the manufacturer specifies them, and correct joint sizing.

Is Sidlesham off your patch?

No. Places such as Sidlesham are covered as much as the big towns. London and every South East county are within our area. We plan jobs in smaller places so return trips are kept to a minimum.

Is it fine to apply new sealant on top of old?

No, never. Overlaying old sealant is a frequent cause of early failure, so everything comes out first.

What site paperwork can you provide?

Let us know your requirements when you ask for a price, and we will confirm the RAMS, insurance and CSCS details with the quote. From you, we will need the asbestos information for older buildings and any site rules.

Is your work guaranteed?

The work is guaranteed for 12 months. Should a joint we sealed give trouble during those 12 months, let us know and we will look at it.

How do you keep disruption to occupiers down?

Most of the buildings we work in stay occupied. Only the area being sealed is closed, and the sequence is agreed in advance.

Who decides which product is used?

Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.

Commercial sealant contractors in Sidlesham, done properly

On a commercial site, sealant turns up in more places than people expect: around sanitaryware, along worktops and splashbacks, at window boards, partition heads and floor junctions. Outside, it closes facade joints, frame perimeters and movement joints against the weather. We deal with internal and external sealant joints alike. If you are dealing with wall and floor joints that have lost their seal and frame mastic that has hardened and come away from the wall, we can put it right, on washrooms and tea points, movement joints in walls and floors and kitchen worktops and splashbacks alike. Whoever orders the work in Sidlesham, the brief is typically the same: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

On a typical commercial building in Sidlesham, the joints that fail first are the hardest-worked ones: frame perimeters in the sun, floor joints at doorways and anything that gets wet every day.

Rural business units near smaller places such as Sidlesham are frequently converted agricultural buildings. Old masonry beside new aluminium, timber and plasterboard gives plenty of joints between materials that move differently.

Every job ends the same way: guaranteed. You get a 12-month guarantee on our workmanship, and the quote explains what it covers.

The Mastic Doctor team beside their liveried vans in front of an office building
Where
Sidlesham (PO20)
Region
West Sussex
Guarantee
12 months on our workmanship
Quote
Quoted before any work starts
Phone
01277 525 020
Page updated
3 November 2026

Common problems we fix in Sidlesham

Resealing over the top is a false economy we come across often. Fresh sealant won’t stick to the old bead underneath, so the top layer lifts, holds water and hides what’s going on. Getting back to a clean joint then means removing every layer.

These are often picked up first by site or facilities staff:

  • Wall and floor joints that have lost their seal
  • Mouldy silicone around WCs, urinals and vanity tops
  • External beads that have gone brittle and cracked
  • A top-up bead over failed sealant, now lifting

For tenants and agents on sites such as Enborne Business Park (0.8 miles south of Sidlesham), office fit-outs, reception joints and window perimeters are the usual sealant work.

What your quote should include

  • Their pre-qualification and accreditations
  • Do they follow the manufacturer’s priming guidance?
  • How they’ll work around occupants
  • What level of public liability insurance do they hold?

Our contractor checklist

Our process

We begin with a short walk round with whoever looks after the building, agreeing which joints are in scope, where to start and what must stay open. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. If others near Sidlesham need work, visits can be combined. A fixed quote is given before anything starts.

  1. First, details come to us: photographs, drawings or a schedule of the areas, and a site visit is booked where it helps.
  2. Next comes a diagnosis and a fixed quote.
  3. Before anything is cut out, we agree access, timings and sequence.
  4. Failed sealant is cut out and each joint cleaned back to sound, dry faces.
  5. The depth is set, primer is used where the maker calls for it, and the fresh bead is applied and tooled.
  6. We walk the completed areas with you and sign them off under the 12-month guarantee.

Before we start on site

  • Point out parking and an unloading spot
  • Point out any areas we must not close
  • Share your working hours and any access restrictions

Getting a fixed quote

Let us know the site, the scope and your timescale, and a fixed quote will follow. The easiest way is to phone 01277 525 020 or email a schedule or drawings.

Ask for a quote

Read more

Why it’s worth doing now in Sidlesham

A cheaper quote sometimes means the old bead stays in. 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. Older rural buildings around Sidlesham move with the seasons, and rigid or tired sealant can’t keep up. The right product, sized to the joint, copes much better.

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

Why us?

  • Colour options checked against the specified product
  • Health and safety: CHAS accredited
  • RAL and finish matching where the product range allows
  • Over 20 years of commercial sealing

Take a look at our cost guide or how we’re accredited.

Quoting for work in Sidlesham

Before we quote, we look at:

  • The total length or number of joints
  • The size and state of each joint
  • Which sealant the job calls for
  • How much existing material needs removing

The price depends on how many linear metres there are, what has to come out first and the access. Call for a fixed quote once you have the details.

Before you send an enquiry

A few photographs plus some basic facts will normally do. Please tell us:

  • Your programme or deadline
  • Whether an asbestos survey exists
  • The product your specification calls for
  • The site address and postcode

For a fixed quote, call the office on 01277 525 020 or send photos by email, telling us the site location and the nature of the job. Our quote form is another easy route.

Commercial sealant contractors in Sidlesham: the local picture

Sidlesham is within about 1 mile of the coast. Buildings near the sea put their external joints through more driven rain, with salt air nearer the beach. A matched colour is only half the brief on an exposed frontage. Less than 3 miles from Sidlesham there are at least three named estates and business parks. Units on sites like these change tenants and get refitted, and each refit leaves joints to seal.

Offices and shops close to stations such as Chichester station, 3.9 miles to the north of Sidlesham, tend to be busy all day, so sealant work is planned around opening hours. Occupiers with premises at both Enborne Business Park and Ferry Yard Industrial Park could have the sealant at each handled under one quote.

Sidlesham is about 3 miles north of Selsey, in West Sussex. Businesses, contractors and managing agents in Sidlesham can call on us for sealant joints. We work across 373 places in West Sussex, from busy centres to rural villages. We also cover Portsmouth, around 13 miles from Sidlesham.

We cover the PO20 postcode districts. Buildings on Rookery Lane, Selsey Road and Manhood Lane are within our area. You’ll find Sidlesham on or near the B2145. We also cover Keynor Estate (1 mile south-west), Street End (1 mile north), Sidlesham Common (1 mile north), Fisher (2 miles north-east) and Church Norton (2 miles south). Nearby towns on our patch include Bognor Regis (4 miles east), Chichester (4 miles north), Selsey (3 miles south), Littlehampton (11 miles east), Rustington (12 miles east) and Angmering (14 miles east).

Around Sidlesham

For rail, the closest station is Chichester station, roughly 3.9 miles north of the centre. Other landmarks nearby include St Richard's Hospital (4.7 miles north) and Chichester Castle (4.4 miles north).

Map of Sidlesham © OpenStreetMap contributors

When something else is needed

We check first that sealant really is the fix. It won’t put right:

  • Suspect materials that need testing and specialist removal
  • Leaks from pipework, wastes or valves (that’s plumbing)
  • Roof leaks that only look like a joint problem

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

What we seal

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

Site staff or a sealant specialist?

A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.

Accreditations

Trusted. Accredited. Insured.