Southampton · England
Commercial Sealant in Portswood
Washrooms, bathrooms and kitchens in Portswood need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Sealant failing again soon after quick repairs
- Washrooms that need sorting before an inspection
- Worktop sealant that has shrunk and stained
About our commercial sealant in Portswood
Mouldy or split sealant in a commercial building causes more than a bad impression. It’s a cleaning problem, a leak risk and something guests and staff notice. Our applicators renew sealant across washrooms, welfare areas, kitchens and guest bathrooms. We work on rental portfolios, retail & leisure sites and welfare facilities, and common reasons people get in touch are sealant failing again soon after quick repairs and black, stained silicone in guest bathrooms.
Commercial work around a smaller place like Portswood generally 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.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Location
- Portswood (SO17, SO14, SO18)
- Region
- Southampton
- Cover
- A year, on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How we quote for commercial sealant
The quote reflects the job in front of us. We look at:
- Working hours on commercial sites
- How many areas need sealing
- Whether the work is at height
- Whether old sealant or filler has to be cut out
The cost depends on the size of the job, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts.
What we need to know
When you call or email, it’s useful to know:
- If someone has resealed it before
- The address or postcode of the job
- A few pictures by email, if you can
- Roughly how big the job is
Need a quote? Please call 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Leave it or put it right?
In a building with rooms above rooms, a failed shower seal can soon show on a ceiling below. Then two rooms are out of action, not one. A reseal now avoids that. Around Portswood, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.
Leaving a failed joint generally makes the job bigger, not smaller. If you are not sure whether it needs doing, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why choose Mr Mastic in Portswood
- Full insurance on every job
- More than 20 years in sealant work
- Anti-fungal silicone where joints get wet
- Sealant colour chosen to suit
Workplaces and buildings in Portswood
For seaside hotels, guest houses and holiday lets around Portswood, busy months put washrooms and kitchens under pressure, so it’s worth checking the sealant before the busiest weeks. Hard water is the norm across most of the South East, which leaves limescale on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in.
Letting a property close to St Denys station? Then several rental properties can be resealed on one programme. Managing a site like St Denys Primary School? Then busy washrooms and kitchens can be resealed in phases so they stay open.
Portswood is about 1 mile north of Southampton, in Southampton. Across the SO17 area, we can carry out commercial sealant at your property. 40 places in Southampton are on our list, from the larger towns to small villages.
Every address in SO17, SO14 and SO18 is within our area for commercial sealant. Whether your property is on Ivy Road, Alma Road and Lawn Road or anywhere close by, our applicators can take on the job. Being close to the A335 and A3035, Portswood is simple for us to get to. If you’re just outside Portswood, we cover St Denys (1 mile south-east), Southampton (1 mile south), Inner Avenue (1 mile south-west), Bitterne Manor (1 mile south-east) and Bitterne Park (1 mile east). Further out, we also cover Thornhill (3 miles south-east), Maybush (3 miles west), Eling (4 miles west), Rownhams (3 miles north-west), Millbrook (3 miles west) and Weston (3 miles south).
Near you in Portswood
Typical jobs here are in homes near St Anne's Catholic School, St Mary's Independent School and South Western Arms. There’s a railway station in Portswood itself: St Denys station. Other landmarks nearby include Marlands Shopping Centre (1.5 miles south) and Royal South Hants Hospital (0.9 miles south). Not far away are Netley Common.
How the job changes by surface
Welfare facilities
Busy staff showers wear sealant out quickly. We reseal with anti-fungal sanitary silicone, including accessible wet rooms.
Office washrooms & kitchens
Office washrooms and tea points are used all day, so we can work early or out of hours where that can be arranged. Basins, urinals, worktops and sinks are all resealed.
Landlord and commercial work in Portswood
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.
If you manage several properties in or around Portswood, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and photos by email help.
When it is not the sealant
In fairness, some problems need a different trade:
- Extraction that isn’t working, which needs an electrician or ventilation contractor
- Certifying fire stopping or building compliance
- Water coming from plumbing rather than sealant
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly before you book.
What we seal
- Hotel bathrooms
- Rental portfolios
- Student & care accommodation
- Welfare facilities
- Retail & leisure sites
- Office washrooms & kitchens
Portswood: your questions answered
Can you help a landlord with a rental near St Denys station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Will you come out to Portswood?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
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, and we’ll say how long yours will take.
Do you take out the old sealant first?
Yes, always, and completely. New silicone does not stick to old silicone, so the joint is cleaned back first.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
Can you work outside opening hours?
In many cases. Tell us your opening hours and quiet times, and we’ll see what can be arranged.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Can you match the sealant colour?
We will suggest a colour to suit the surroundings. The product needed can limit the range.
Common problems we fix in Portswood
Quick fixes come back quickly. Sealing over old silicone, sealing wet joints or using the wrong product all lead to the same thing: another reseal before long.
Any of these means the joints need attention:
- Tired sealant in let properties
- Sealant failing again soon after quick repairs
- Tired sealant ahead of a health and safety audit
- Washroom sealant that looks dirty however often it’s cleaned
Community buildings like Highfield Church are part of the picture too: its kitchen and washroom sealant needs looking after like anywhere else.
Before you book anyone
- Whether they seal over old material or remove it
- What insurance they hold
- Whether VAT is included
- What preparation is included
Places near Portswood
What else we do in Portswood
The process
The work is kept neat and contained to the joints we’re treating, so you can get on with your day. The job normally takes a few hours per area, with larger sites planned over several visits, and we tell you how long to leave it before we go. For a job in Portswood, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- The first visit is a look round the site to agree the scope.
- We agree when we’ll work, with early or out-of-hours slots where they can be arranged.
- Each area is protected and stripped of old sealant.
- Joints are dried, then resealed and tooled neatly.
- Housekeeping or site staff are told when each area can be used.
How to prepare
- Keep children and pets away from the work area
- Mention if the joints have been sealed before
- Let us know if you’ve seen damp or leaks
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.