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

Catherington commercial sealant contractors

Commercial sealant contractors for Catherington, from a contractor working since 2005. Fully insured and CHAS accredited.

  • Gaps behind commercial kitchen worktops and sinks
  • Black mould through washroom sealant that won’t clean off
  • Leaks that seem to come through a sealant line
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
London, the South East & Scotland
Constructionline member
£5m public liability

Commercial sealant contractors for businesses in Catherington

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

Common questions from Catherington clients

Will you take on work at estates like Enterprise Industrial Estate, close to Catherington?

Yes, sites like Enterprise Industrial Estate are within our area, along with the rest of Catherington. A few photographs and the unit address let us price the work.

Do you offer colour-matched sealant for buildings in Catherington?

Yes, we can normally get close to most finishes from the product’s colour range. The quote lists the colours the product is made in.

How long does a job like this take?

We plan the time on site around your programme and access. You’ll have an expected duration with the quote.

How is commercial sealant work priced?

Send photos, drawings or a list of locations through the quote form on this site. If a visit is needed we’ll book one, and a fixed quote follows.

How long do sealant joints last?

Nobody can honestly give a figure in years, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular inspection is the best way to catch problems early.

Can you take on work for an FM or managing agent?

Yes. FMs, managing agents and landlords are among our regular clients as well as contractors. We can work to your instruction process and site rules.

Can you supply RAMS and insurance details?

Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote. We’re CHAS accredited and a Constructionline member, with five million pounds of public liability insurance.

Sealant specialists in Catherington

Most of the buildings we seal stay open while we are there. Tell us your site hours and access windows and we will plan around them. That applies whether the building is an office, a shop, a hotel, a college or a care home. Site teams most often ask us about frame sealant that has cracked, shrunk or pulled away and water staining near frames, panels or ceilings, on movement joints in walls and floors, window and door perimeters and floor and threshold joints. Whether you call it commercial sealant work, mastic application or joint sealing, in Catherington it comes down to the same thing: the right product in a properly prepared joint.

A lot of what we do in Catherington is replacing sealant that has done its years: hardened, cracked or shrunk away from the faces, and letting water or dirt in.

Work in smaller places such as Catherington tends to come one building at a time: a pub kitchen, a hall, a small office. We’ll want a full list and photographs first, so the right products come on the day and nothing waits for a second trip.

We stand by our work: 12 months, guaranteed. It covers how we prepared and applied the sealant, and we come back if anything isn’t right.

The Mastic Doctor team standing beside their branded vans outside an office building
Where
Catherington (PO8)
Wider area
Hampshire
Cover
12 months on our workmanship
Price
Fixed quote, scope in writing
Telephone
01277 525 020
Updated
3 November 2026

Cost factors for sealant joints

Your fixed quote is built from the real scope. It allows for:

  • The site’s rules and procedures
  • Distance, for remote addresses
  • The total length or number of joints
  • Backing rod, priming and other preparation

The product called for affects the cost, and so does the preparation, from cutting out to priming and backing rod. Access, phasing and site rules also count.

Details that help us quote

A few photos plus some basic facts will normally do. It helps to include:

  • When you need the work done
  • Drawings or a marked-up plan, if available
  • Specification clauses that apply
  • Clear photographs of the problem areas

The quickest route to a quote is a few photographs and the site postcode. Upload them with the quote form, or phone 01277 525 020 or use the quote form to discuss it first.

Common problems we fix in Catherington

When a bead peels cleanly off one face, it has failed in adhesion. Typical reasons include rushed preparation, no primer where one was needed, dust or release agents on the surface, or three-sided adhesion. It’s one of the commonest faults we find on earlier work.

Things that typically lead to an enquiry:

  • Weathered facade sealant that no longer flexes
  • Damp patches where an external joint has failed
  • Black mould through washroom sealant that won’t clean off
  • Messy, uneven beads from earlier work that let the building down

If you have premises on more than one site, say at Enterprise Industrial Estate and Westfield Industrial Estate, one contractor and one quote can cover both.

Before you book anyone

  • How long is the guarantee, and what does it include?
  • How joint depth will be controlled
  • Will failed sealant be removed rather than covered?
  • The named product and why it was chosen

Choosing a commercial sealant contractor

Owners, agents and contractors

Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Catherington can form part of a wider programme.

Hotels, schools, healthcare sites, offices and retail units come to us directly as well. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.

Maintenance after handover

After handover, these steps help:

  • Check joints after other trades have worked nearby
  • Make sure ventilation in wet areas is switched on and working
  • Log reseals in the O&M or maintenance records
  • Add sealant to the planned maintenance inspection list

Keep an eye out for other trades after we have gone. Shop refits, new services and replaced fittings often break the seal around them and the joint gets left open. If that happens, give us a call on 01277 525 020 or send photos by email and we will price putting it right.

Once sealant fails in a movement joint, grit and debris get in. With nothing soft to close against, the materials either side take the load and start to break up. At that point it’s a repair job rather than a reseal.

Why it’s worth doing now in Catherington

Reactive resealing, a leak at a time, tends to cost more overall than a plan. A planned programme groups work by building or area, cuts repeat visits and gives you a budget figure. We’ll suggest an order, worst sealant joints first. Halls, stores and units around places like Catherington may not be checked every day, so a failed joint can leak for a while before anyone sees it. Renewing joints in good time avoids the problem.

Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a fixed quote.

Why choose Mastic Doctor in Catherington

  • Work carried out by CSCS-carded applicators
  • Over 20 years of commercial sealing
  • Old sealant cut out, never sealed over
  • Constructionline member

Read our cost guide or our accreditations and insurance.

From enquiry to sign-off

Where the site stays busy, the work is phased so only one area is out of use at a time. Each section is protected, cleaned back and sealed before we move to the next. Jobs in and around smaller places like Catherington are normally planned as a single visit, so photographs and measurements up front really help. That way the right products come on the day.

  1. You send photos, drawings or a list of the joints and areas involved, or we arrange a site visit.
  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. Backing and primer go in where needed, then the chosen sealant is applied and tooled.
  6. Each area is inspected, signed off and backed by our 12-month guarantee.

Preparing the site

  • Tell us what induction or permit system the site runs
  • Move anything stored against the joints
  • Tell staff and tenants when we’ll be in

Get a fixed quote

If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price the work to it. For smaller jobs, photos and a description will do.

Get a price

Related advice

What Catherington’s businesses ask us to seal

Less than 3 miles from Catherington there are two named estates and business parks. Units on sites like these change tenants and get refitted, and each refit leaves joints to seal. Central London is about 56 miles from Catherington. The South East around the capital has large numbers of business parks, offices and retail centres, especially around the motorway corridors. Occupiers with several premises in the region tend to prefer one contractor and one point of contact.

On a business park such as Enterprise Industrial Estate (0.9 miles south-east of Catherington), sealant work tends to follow fit-outs: receptions, tea points, washrooms and frame perimeters. Premises within reach of Rowlands Castle station (3.5 miles south-east of Catherington) often have busy frontages where joints are seen by everyone passing.

Catherington is about 2 miles north of Horndean, in Hampshire. If you are looking for commercial sealant contractors in Catherington, we can help. Across Hampshire, 723 places are covered, including Catherington. Portsmouth is covered too, some 9 miles away.

Anyone looking for commercial sealant contractors in PO8 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. Streets here include Glamorgan Road, Wrexham Grove and White Dirt Lane, and sites on any of them can send details for a fixed quote. We also cover Clanfield (1 mile north), Lovedean (2 miles south-west), Horndean (2 miles south), Wecock Farm (2 miles south-west) and Anmore (3 miles south-west) for sealant joints. Further afield, our area takes in Gosport (11 miles south-west), Havant (5 miles south), Eastleigh (15 miles west), Fareham (10 miles south-west), Alton (15 miles north) and Hedge End (13 miles west).

Near you in Catherington

Around Catherington, our work takes us to commercial buildings near Horndean Technology College, among other places. The closest station to Catherington is Rowlands Castle station, roughly 3.5 miles south-east. Well-known places in the area include Havant War Memorial Hospital (5.3 miles south) and Clanfield Earthwork (1.7 miles north-east). Green spaces nearby include Windmill Hill.

Map of Catherington © OpenStreetMap contributors
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