Portsmouth · England
Commercial sealant contractors in PO3
We cover every part of the PO3 postcode district, which takes in Baffins, Copnor and Milton. Failed sealant is always cut out completely, with a 12-month guarantee.
Sealant contractors for PO3
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Places in PO3
Services in PO3
- Coloured and colour-matched sealant
- Commercial sealant contractors
- Mastic sealing for building owners and managing agents
- Fire-rated sealing and fire stopping
- Commercial washroom and wet-area sealing
- Industrial and floor joint sealing
- Facade and window perimeter sealing
- Construction and new-build mastic
- Expansion and movement joint sealing
- See all services
Tell us what needs doing and your postcode and we’ll come back with a price: speak to us on 01277 525 020 or email a schedule or drawings.
Postcodes nearby
Across Portsmouth
Towns and villages in Portsmouth
Areas we cover
Commercial sealant contractors in PO3: how it works
Sometimes a split bead is a symptom rather than the cause. Water at a window perimeter might be coming from the frame, the cill or the wall behind while a movement joint that keeps tearing may simply be too narrow for the job. Part of the job is telling you when the fix is something other than sealant. We work on kitchen worktops and splashbacks, external facade joints and movement joints in walls and floors, and what we’re called in for most is damp patches where an external joint has failed and frame mastic that has hardened and come away from the wall.
On arrival, we report to your site contact and complete whatever induction the building runs. Everything around the joints gets protected before any cutting starts, and the work typically takes a few hours for one area, or a planned series of visits across a bigger building.
- We begin with whatever information you have, whether that’s photos, a drawing or a list of locations, and a site visit is booked where it helps.
- We work out why the joints have failed and fix a quote for the agreed scope.
- Site hours, access windows and the order of areas are agreed before we start.
- Failed sealant is cut out and each joint cleaned back to sound, dry faces.
- The depth is set, primer is used where the maker calls for it, and the fresh bead is applied and tooled.
- We walk the completed areas with you and sign them off under the 12-month guarantee.
How we quote
Pricing sealant joints depends on how many there are, their condition and the access, plus any specification you are working to. Ask us for a fixed quote.
Why choose Mastic Doctor
- Work to your specification and the manufacturer’s guidance
- Public liability insurance in place
- 12-month guarantee on workmanship
- RAL and finish matching where the product range allows
Request a quote
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to ring 01277 525 020 or email the details over with what you know.
Landmarks near Baffins
We work on buildings around The Baffins pub, St Edmund's Catholic School and Miltoncross Academy, among other places. Other local landmarks include Church of St Cuthbert (under half a mile west), Langstone Junior Academy (under half a mile south) and Alexandra Park (1.7 miles north-west). The nearest railway station is Fratton station, about 1 mile south-west of the centre. A little further out are The Bridge Shopping Centre (1.1 miles south-west) and Southsea Castle (2.4 miles south-west). Not far away are Portsdown Hill and Milton Locks.
Shops, offices and hotels in PO3
In PO3, much commercial sealant work follows refits in shops, offices and hotels in places such as Milton, Hilsea and Baffins. Visible joints call for a matched colour and a clean tooled finish.
The South East is one of the UK’s drier regions, but external sealing in PO3 still needs a dry joint and the right temperature, and damp or frosty mornings can hold it up. Along the coast in PO3, hospitality buildings tend to be busiest in the summer months, which makes the quieter months a good time for sealant work.
Baffins: In hotels such as Eastfield Hotel, 1.2 miles south of Baffins, refurbishments usually mean bathroom, bar and reception joints where a matched sealant colour has to sit with the finishes. For premises near Fratton station (1 mile south-west of Baffins), footfall is part of the plan: work is phased so shops and offices keep trading.
After the work
Your facilities or cleaning team can help the joints last. Share these points with them:
- Keep abrasive pads and scrapers off resealed joints
- Report cracked or peeling sealant early
- Keep barriers up until the new sealant has cured
- Put external and wet-area joints on a regular inspection round
Brief your cleaning team on the joints that have been resealed. Abrasive pads, scrapers and some strong chemicals damage sealant surfaces.
Tenants and staff spot black or split sealant quickly. Replacing it on a planned cycle keeps complaints down.
Common problems we fix in PO3
If only one face has lost its grip, that’s an adhesion failure. Typical reasons include rushed preparation, no primer where one was needed, dust or release agents on the surface, or three-sided adhesion. We see it often where joints were sealed in a hurry.
It’s worth sending us details if you spot any of the following:
- Weathered facade sealant that no longer flexes
- Smeared sealant across finishes from a rushed job
- Earlier reseals applied straight onto the failed bead
- Leaks that seem to come through a sealant line
Honest limits
Sealant solves a lot, but not everything, and we’re upfront when that’s the case. These need a different solution:
- A dripping trap, valve or pipe behind a fitting
- Cracking that needs a structural engineer to look at it
- A failed roof covering or waterproofing membrane
What happens if it’s left?
Before budgeting for new frames, cubicles or worktops, check whether it’s just the sealant. Often the fitting is sound and the joint is the only thing letting it down. A careful reseal is a far smaller undertaking than replacement.
What your quote should include
- Whether their applicators hold CSCS cards
- Whether primer will be used where the manufacturer specifies it
- The terms of the workmanship guarantee
- Will RAMS and insurance details be available?
Site staff or a sealant specialist?
General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class, which is what makes a joint last.
A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
Questions about PO3
How soon can the area be used again?
The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.
Is failed sealant stripped out, or sealed over?
Every scrap of failed sealant is removed before the new bead goes on. A bead laid on old silicone peels away.
Do you work for facilities managers and managing agents?
Yes, and through main contractors too. We quote, schedule and report back in the way that suits your process, with a 12-month guarantee on the workmanship.
When is resealing likely to be due?
It depends on movement, UV and weather, cleaning, traffic and the product. Sealant joints are maintenance items, so inspect them regularly.
Are you CHAS accredited?
Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.
Are your applicators CSCS-carded?
Yes. Should the site need card details in advance, tell us and we’ll confirm them with the quote.
Will the building have to shut during the work?
It’s normal for us to work in occupied buildings. We agree the order of areas, protect what’s nearby and close off only the section we are sealing for as long as the cure needs.