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

Mastic sealing for building owners and managing agents in Slindon, West Sussex

Mastic sealing for Slindon, from a contractor working since 2005. Fully insured and CHAS accredited.

  • Occupiers reporting cold air round windows
  • Communal area joints that look neglected
  • Leaks at window and door perimeters
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
Constructionline member
£5m PL insurance

Mastic sealing for Slindon sites

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

Mastic sealing for commercial buildings in Slindon

Different joints need different sealants. Window perimeters and external joints often take a low-modulus neutral-cure silicone, while hybrid polymer sealants grip many materials and are often paintable, and colours are confirmed for whichever product is used. Site teams most often ask us about water getting in round frames after rain and the same joint failures repeated across a portfolio, on shopfronts below residential blocks, external wall and movement joints and balcony and threshold joints. For commercial sealant work in Slindon, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.

Rural conversions near places like Slindon often set modern frames into older stone, flint or brick. The mastic needs to suit an irregular masonry face and the look of the building.

We sign every job off with a 12-month guarantee. The promise is simple: if the work we did fails within twelve months, we return to fix it.

The Mastic Doctor team standing beside their branded vans outside an office building
Location
Slindon (BN18)
Wider area
West Sussex
Guarantee
12 months on our workmanship
Price
A fixed quote before we start
Call
01277 525 020
Updated
3 November 2026

What sealant work can’t fix

Being straight saves everyone time. New sealant won’t cure:

  • Leaks from above rather than through a joint
  • Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
  • Frames that are rotten, warped or broken

If you are not sure, just ring 01277 525 020 or email a schedule or drawings and we’ll give you a straight answer.

Surfaces we seal

  • Communal kitchens and washrooms
  • Communal entrances and stairwells
  • Shopfronts below residential blocks
  • Balcony and threshold joints
  • External wall and movement joints
  • Window and door perimeters on blocks

Questions we are asked in Slindon

Is Tokar Industrial Park, near Slindon, within your area?

Yes. Estates, retail parks and business parks around Slindon, Tokar Industrial Park among them, are all within reach. Photos and a short description are enough for a first look.

Is Slindon too small for you to travel to?

No. Small places get the same service as large ones. London and every South East county are within our area. Send photographs and a list of what needs doing, and we will plan the job to need as few trips as possible.

Is any job too small?

Small jobs are welcome alongside larger packages. Photos and a description are enough to start.

Do you need to see the site first?

Many jobs can be quoted from photographs, drawings or a joint schedule. Where they aren’t, we arrange a site visit.

Is mastic sealing guaranteed?

Every building we reseal has a 12-month guarantee. It applies to our workmanship rather than damage or problems with the frames.

Do you work to architects’ specifications?

Yes. Include it with the drawings when you ask for a quote, and we’ll price the work to it, flagging anything that needs clarifying.

How long will the new sealant last?

Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular inspection is the best way to catch problems early.

Signs you need mastic sealing in Slindon

Buildings move with temperature and moisture, and every joint has to stretch and squeeze with them. A joint that was too narrow, too thin or the wrong product can’t cope long before it should.

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

  • Movement joints with sealant missing
  • Complaints coming in block by block
  • Damaged joints in communal entrances and corridors
  • The same joint failures repeated across a portfolio

Property owners at sites such as Tokar Industrial Park, 2 miles south of Slindon, can have mastic renewed between lettings.

Questions to ask before you book

  • Which product they’ll use, and why it suits the joint
  • Whether old or failed sealant will be cut out, not overlaid
  • What site paperwork they can supply
  • How long is the guarantee, and what does it include?

Our contractor checklist

From enquiry to sign-off

On arrival, we sign in, go through any site induction and check how permits are handled. Everything around the joints gets protected before anything is cut or cleaned, and the work typically takes a day or two for a single block, longer for an estate programme. If others near Slindon need work, visits can be combined. You will have a fixed quote before work starts.

  1. We inspect the joints, building by building, and record what has failed and why.
  2. We send a fixed quote that sets out the joints, the products and the programme.
  3. The programme is fixed with you, including dates you can pass on to residents or tenants.
  4. Failed mastic is removed and the faces taken back to sound, dry material.
  5. Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
  6. Completed joints are inspected and carry a 12-month workmanship guarantee.

Before we start on site

  • Tell us what induction or permit system the site runs
  • Send your site hours and access windows
  • Tell us which areas need to stay in use

Ask for a quote

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price against exactly what is specified. For smaller jobs, photographs and a description will do.

Ask for a quote

Advice

What happens if it’s left?

Piecemeal repairs over the years often leave mismatched sealant. Resealing a whole building gives a consistent finish and one 12-month guarantee. One visit to deal with every failing joint makes more sense than several trips to a place like Slindon, rather than one at a time. Send photographs of each area and we will quote for the lot.

The work involved drives the cost: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a quote and we’ll explain how it’s made up.

Why clients in Slindon choose us

  • Our applicators hold CSCS cards
  • Public liability insurance in place
  • Constructionline member
  • Specification-led, product-correct work

See how commercial sealant jobs are priced and our accreditations.

Looking after buildings in and around Slindon

Central London is about 50 miles from Slindon. Around the capital’s commuter belt, managing agents look after many blocks close to stations and town centres. Slindon sits in one of the drier corners of the country, the South East. Outside work still depends on dry joints, while the elevations that take the most sun tend to show hardened mastic first.

If your remit includes a building such as Slindon CofE Primary School, frame and door mastic can be programmed for the holidays. For agents with blocks near Barnham station, 2.5 miles south of Slindon, a block-wide mastic programme deals with frames, balconies and entrances in one go.

Slindon is about 6 miles north-east of Bognor Regis, in West Sussex. Anywhere in BN18, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. We work across 373 places in West Sussex, from busy centres to rural villages. Portsmouth is covered too, around 20 miles from Slindon.

Anyone looking for mastic sealing in BN18 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. We cover commercial and managed buildings on School Hill, Dyers Lane and Slindon Top Road and the roads nearby. Nearby places we also cover include Slindon Common (1 mile south-east), Fontwell (1 mile south-west), Avisford (1 mile south-east), Walberton (1 mile south) and Binsted (2 miles south-east) for mastic joints. A short drive away, we cover Worthing (11 miles east), Bognor Regis (6 miles south-west), Chichester (7 miles west), Selsey (11 miles south-west), Littlehampton (6 miles south-east) and Lancing (14 miles east).

Local landmarks in Slindon

We work on buildings around Ormiston Six Villages Academy and The Newburgh Arms Public House. Slindon’s nearest station is Barnham station, about 2.5 miles south of the centre. Other landmarks nearby include Arundel and District Hospital (3 miles east) and Tote Copse Castle (3.4 miles south-west). Not far away are Bignor Hill and WWT Arundel.

Map of Slindon © OpenStreetMap contributors

Owners, agents and contractors

CHAS accredited and a Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.

Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Slindon can form part of a wider programme across West Sussex.

Quoting for work in Slindon

Quotes vary with the job. Expect it to depend on:

  • Distance, for remote addresses
  • How accessible the joints are
  • How much there is to seal
  • Removal of failed or old sealant

Larger quantities, tricky access or phasing all shape the price. Site requirements like inductions and permits play a part as well.

Before you send an enquiry

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

  • Your programme or deadline
  • The asbestos register, for older buildings
  • The type of building and who uses it
  • The product your specification calls for

Every quote starts with the facts: the joints involved, quantities, access and the product called for. Share whatever details you have and we’ll fill any gaps with a visit.

Accreditations

Trusted. Accredited. Insured.