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

Sealant applicators in Horndean

Need commercial sealant contractors in Horndean? It’s simple: send details, get a quote, we seal, guaranteed.

  • Mouldy silicone around WCs, urinals and vanity tops
  • Movement joints packed with grit and debris
  • Smeared sealant across finishes from a rushed job
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
Constructionline member
£5m PL insurance

Commercial sealant contractors for Horndean sites

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

Sealant specialists in Horndean

Most commercial buildings carry hundreds of metres of sealant that nobody thinks about until it fails. Mastic Doctor works as a commercial sealant contractor for facilities managers, managing agents and main contractors looking after property in Horndean. Our job is to diagnose the failure, remove the old bead and seal again using a product chosen for the movement and exposure. Site teams most often ask us about messy, uneven beads from earlier work that let the building down and frame mastic that has hardened and come away from the wall, across movement joints in walls and floors, window and door perimeters and washrooms and tea points. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, the work in Horndean is the same: failed joints cut out, faces prepared and the right sealant laid to the right depth.

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

Many businesses in towns like Horndean work from older buildings that have been altered more than once. Joints where brick or render meets a newer frame or panel move differently, so the sealant has to suit both sides, in a colour that suits the frontage.

We stand behind the joints we seal: 12 months, guaranteed. It covers how we prepared and applied the sealant, and if something we did falls short, we return to it.

Where
Horndean (PO8, PO7)
Region
Hampshire
Guarantee
A 12-month guarantee
Price
A fixed quote before we start
Phone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

How the quote is worked out

A fixed quote reflects the actual work. It takes account of:

  • Backing rod, priming and other preparation
  • How much there is to seal
  • How much existing material needs removing
  • The site’s rules and procedures

The price depends on the quantity of joints, what has to come out first and how the joints are reached. Call for a quote when you are ready.

What we need to price the job

Whether it’s one area or a whole building, these details speed things up:

  • Clear photos of the problem areas
  • Specification clauses that apply
  • Access details, including height
  • Where the site is, with the postcode

Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price against exactly what is specified. Smaller jobs need nothing more than photos and a few notes.

Commercial premises in Horndean

Three care or nursing homes sit less than 2 miles from Horndean. Care homes need tidy, cleanable joints in kitchens, corridors and communal rooms. Rainfall across the South East, Horndean included, is lower than in many parts of the UK. Even so, outside sealing waits for a dry joint, and cold, damp mornings can delay it.

A unit on an estate like Westfield Industrial Estate (to the north-east of Horndean) normally has an office front, a trade counter and staff facilities with joints of their own. A business with units at Westfield Industrial Estate and Enterprise Industrial Estate needn’t use two contractors for its sealant. For premises near Rowlands Castle station, 2.6 miles to the south-east of Horndean, footfall is part of the plan: work is phased so shops and offices keep trading.

Horndean is about 7 miles north-east of Portsmouth, in Hampshire. Any commercial site in Horndean is covered, whether it’s a single job or part of a planned programme. We work across 723 places in Hampshire, large and small. For work in that direction, see our Portsmouth page.

Business premises anywhere in PO8 and PO7 are within our area for sealant joints. For a building on London Road, Kings Mede and Causeway Farm or nearby, we can quote for sealant joints. With the A3 and A3(M) nearby, Horndean is straightforward for us to reach. We also cover Lovedean (1 mile west), Wecock Farm (1 mile south-west), Catherington (2 miles north), Anmore (2 miles west) and Denmead (2 miles west). A short drive away, we cover Gosport (9 miles south-west), Havant (3 miles south), Eastleigh (15 miles west), Fareham (9 miles south-west), Hedge End (13 miles west) and Petersfield (7 miles north-east). Horndean is one of the busier places in Hampshire, and we take on sealant joints for its commercial and public buildings.

Local landmarks in Horndean

We work on buildings around Horndean Infant School and Red Lion Inn and the streets around them. For rail, the closest station is Rowlands Castle station, about 2.6 miles south-east. A little further out are Havant War Memorial Hospital (3.8 miles south) and Clanfield Earthwork (3 miles north-east). Open spaces near Horndean include Windmill Hill and Southmoor Nature Reserve.

Map of Horndean © OpenStreetMap contributors

FAQs: Horndean

Can the sealant on our Horndean premises match the finishes?

Yes, sealants come in a wide range of standard colours, and matching to RAL references, cladding, stone or frames is a common request. The quote lists the colours the product is made in.

Which documents can you supply for work in Horndean?

We will confirm the paperwork you need, such as RAMS, our insurance certificate and CSCS details, with the quote. Our applicators are CSCS-carded, and we carry £5m public liability insurance.

Does weather matter for sealant work?

For external joints, yes. Sealant needs a dry joint and a temperature within the product’s range, so frost, rain or cold mornings can delay outside work. Internal work is rarely affected.

Do you check for asbestos before removing sealant?

We check the asbestos register or survey before any old sealant is disturbed. The duty to manage asbestos sits with the dutyholder, and we don’t remove asbestos-containing materials.

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.

How long does a job like this take?

It depends on the scope, though a typical visit 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’ll give you a timescale with the quote.

Are you CHAS accredited?

Yes. We’re CHAS accredited, we’re a Constructionline member and we use CSCS-carded applicators.

How the job changes by surface

Washrooms and toilets

Mould that has grown into washroom sealant can’t normally be cleaned out. The lasting answer is removal, preparation and a new sanitary bead.

Shop fronts and retail fit-outs

Retail work typically has to fit around trading. Tell us your trading hours and access windows and we will plan around them, working in sections where that helps.

What happens if it’s left?

A cheaper quote sometimes means the old bead stays in. New sealant laid on old silicone has nothing to bond to, so it peels. Every quote we give includes full removal and preparation, because that’s what makes the new bead last. In a town such as Horndean, a lot of buildings are older and have been altered over time, so joints between old and new are often the first to go. Resealing them early protects the building behind.

No two sites price the same: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.

What you get with us

  • A Constructionline member, so easy to vet
  • Fully insured, including public liability cover
  • Colours confirmed for the specified product
  • Health and safety: CHAS accredited

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

On site: what to expect

We follow your site rules from the start: sign-in, induction and whatever permit system the building uses. With the paperwork done, we take the joints in the sequence agreed with you, and each area is checked before we leave it. Most work in Horndean is one building at a time: a school, a unit, an office or a block. Your photos, drawings or a site visit come first, followed by a fixed quote.

  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. Work is phased around your occupiers where areas need to stay in use.
  4. Old sealant is cut out completely, never sealed over.
  5. Each joint gets a suitable sealant, laid to depth and tooled.
  6. We check the work with you, and the 12-month guarantee starts.

Getting the site ready

  • Agree which areas must stay open
  • Point out parking and an unloading spot
  • Let building users know which areas are affected

Get a fixed quote

Tell us about the building, the joints and when you need the work done, and we’ll put a fixed quote together. To get it moving, phone 01277 525 020 or send details through our quote form.

Ask for a quote

Read more

Owners, agents and contractors

Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. We work to your programme, your specification and your site rules.

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.

What we can’t put right

Our job is the joint, not everything around it. Sealant alone won’t deal with:

  • A failed roof covering or waterproofing membrane
  • Cracking that needs a structural engineer to look at it
  • Old mastic that tests positive for asbestos

If you are not sure, just give us a call on 01277 525 020 or send details through our quote form and we’ll give you a straight answer before you book.

What we seal

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

Trusted. Accredited. Insured.