Portsmouth · England
Copnor Commercial Sealant
Commercial sealant for Copnor and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Shower leaks reaching the floor below
- Repeated reseals that do not last
- Failed joints in office kitchens and tea points
Should I try it myself first?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Commercial sealant in Copnor, done properly
For a rental portfolio, resealing between tenants keeps bathrooms and kitchens presentable. We can quote for several properties at once. We work on welfare facilities, hotel bathrooms and student & care accommodation, and common reasons people get in touch are worktop sealant that has shrunk and stained and rental bathrooms that need resealing between tenants.
Commercial work around a smaller place like Copnor usually means a pub, a shop, a school or small business units rather than office blocks. The work is the same as in a big building, just on a smaller scale.
Your job is guaranteed for a year, as with all our work.
- Where
- Copnor (PO3, PO2, PO1)
- Wider area
- Portsmouth
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
If you manage several properties in or around Copnor, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Log resealing so you know what’s due
- Tell cleaning staff when each room can be used
- Keep extractor fans working and serviced
- Plan resealing around quiet periods
Keep the extraction running and maintained. Where a room has no window, the fan is what dries it out, and that is what keeps mould away.
In a commercial building, a leak can quickly spread beyond one room: through floors, into ceilings and across into corridors. Dealing with the joint early stops that spread.
When to call us in Copnor
Commercial bathrooms get far more use than domestic ones, and they’re cleaned with strong products every day. That is why sealant fails sooner.
Look out for any of the following:
- Tired sealant ahead of a health and safety audit
- Whole floors of tired en suites
- Worktop sealant that has shrunk and stained
- Mouldy bathrooms flagged at a tenancy check
Schools such as Westover Primary School are buildings too, and sealant in washrooms, kitchens and changing areas can be renewed around term times or opening hours.
Before you book anyone
- Whether all the old sealant comes out first
- What happens if they find a problem under the old sealant
- Whether the sealant suits the joint
- Whether VAT is included
What we do, step by step
When we arrive, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work begins. The work normally takes as long as the scope needs, from one welfare room to a full building. In a smaller place like Copnor, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- Tell us the rooms, hours and site rules, and we’ll plan the programme.
- We go through your site’s paperwork needs, such as RAMS, before work begins.
- In each room, the old bead comes out and the joint is cleaned and treated.
- We reseal with the right product for each joint.
- Rooms are handed back in order, each with its cure time.
Before we arrive
- Let us know about parking restrictions
- For business premises, tell us about site rules or sign-in
- For indoor joints, keep the area dry beforehand if you can
How to get a quote
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before we start.
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What the job involves on each surface
Hotel bathrooms
Early starts or out-of-hours work can be arranged around check-out and check-in.
Welfare facilities
Busy staff showers wear sealant out quickly. Anti-fungal sanitary silicone is used throughout, including accessible wet rooms.
Other services in Copnor
Commercial buildings in Copnor
If you run a hotel, guest house or holiday let in a coastal place like Copnor, busy months put washrooms and kitchens under pressure, so it’s worth checking the sealant before the busiest weeks. Copnor has hotels and guest accommodation in and around it. For hotels, a room-by-room programme keeps most rooms in use while the work goes on.
If you look after a church, hall or community building such as Church of St Alban, its kitchen and washroom sealant needs looking after like anywhere else. For landlords with property near Fratton station, we can quote for one property or a whole portfolio of rentals.
Copnor is about 1 mile east of Portsmouth, in Portsmouth. Homes, rented property, offices and hotels in Copnor can book us for commercial sealant, old or new, large or small. Every job comes with our one-year guarantee. Our area takes in 19 places across Portsmouth, from the larger towns to small villages.
Jobs for commercial sealant in PO3, PO2 and PO1 is quoted and booked the same way as anywhere else. Commercial sealant is available to properties on New Road, Lynn Road and Byron Road. Being close to the A288, Copnor is simple for us to get to. Other places close to Copnor include Baffins (1 mile south-east), Kingston (1 mile south), Portsmouth (1 mile west), Fratton (1 mile south-west) and North End (1 mile north-west).
Around Copnor
Locally, jobs take us to homes and businesses close to The Jolly Taxpayer pub, Alexandra Park and St Edmund's Catholic School and the streets around them. Copnor’s nearest station is Fratton station, about 1.1 miles south-west. Other landmarks nearby include The Bridge Shopping Centre (1.1 miles south-west) and St Mary's Hospital (0.7 miles south). The countryside around Copnor includes Milton Locks and Portsdown Hill.
Your questions about commercial sealant in Copnor
Is Copnor within the area you cover?
Yes. Copnor is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work for hotels and guest houses in Copnor?
Yes, we work for hotels as well as homes and businesses. Rooms can be done a few at a time, so the building stays open.
Where is Mr Mastic based?
We are based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
How long does commercial sealant take?
As a guide, most jobs take a few hours for a single washroom, longer for a whole building. Bigger jobs take longer.
When can guests or staff use the shower again?
Follow the cure time we give you, which is usually around 24 hours. A room-by-room programme keeps only a few rooms out at once.
Is there a guarantee?
Yes, always. There’s a 12-month guarantee on every job.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
What information do you need?
Tell us what needs doing and where. If we need more, we will ask.
How we quote for commercial sealant
Call for a quick quote. The main things that affect it are:
- The size of the job
- Working hours on commercial sites
- Access and height
- Which sealant suits the joint
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
Helping us quote
To help us quote quickly, please include:
- If someone has resealed it before
- What’s wrong with the joints now
- Pictures of the joints, sent by email
- Any access issues, like height or stairs
Want a quote for commercial sealant? Please call 0345 464 0079 or drop us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.