Greater London · England
South Hampstead Commercial Sealant
We cover South Hampstead for sealant work for offices, hotels, washrooms and commercial buildings. Old material cut out, joints cleaned and sealed neatly.
- Rental bathrooms that need resealing between tenants
- Washroom sealant that looks dirty however often it’s cleaned
- Sealant failing again soon after quick repairs
What sealant work cannot fix
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- A shower tray, bath or basin that is cracked or broken
- Faulty shower valves and leaking traps
- Extraction that isn’t working, which needs an electrician or ventilation contractor
If you’re not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
Joints and surfaces we work on
- Retail & leisure sites
- Hotel bathrooms
- Office washrooms & kitchens
- Welfare facilities
- Rental portfolios
- Student & care accommodation
About our commercial sealant in South Hampstead
Wet areas get anti-fungal sanitary silicone, and kitchens get a food-safe product where it’s needed. We use sealants from Arbo and Everbuild, chosen to suit each joint. If you have failed joints in office kitchens and tea points and joints that need doing before an inspection or audit, we can put it right, whatever the surface.
Commercial work in London comes with its own logistics: loading restrictions, building rules and tight access. Timings and access are agreed with the building before work starts in South Hampstead.
Our work is backed for twelve months.
- Place
- South Hampstead (NW3, NW8, NW6)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Hotel bathrooms
Hotel showers and baths get used and cleaned every day, so we use anti-fungal sanitary silicone and finish joints smooth for easy cleaning.
Student & care accommodation
In care settings, we agree the order and timings with staff, and staff are told when each bathroom can be used.
Aftercare tips
Simple care keeps the joints in good condition. We recommend:
- Check extract fans are actually running
- Put a squeegee in each shower
- Tell cleaning staff when each room can be used
- Log resealing so you know what’s due
Keep the extraction running and maintained. In internal bathrooms, a weak or broken fan lets moisture linger, and mould comes back faster without it.
Rooms out of use cost a hotel or landlord money. Catching faults early means they can be put right in a short window, instead of turning into a leak that closes the room.
Quotes for commercial sealant in South Hampstead
Your quote is based on your job. We look at:
- When we can work, for business premises
- Access and height
- How many rooms, windows or areas are involved
- Whether old sealant or filler has to be cut out
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Asking for a quote
What to tell us when you ask for a quote:
- The problem you’ve noticed
- The rough size of the job
- Whether it has been sealed before
- Access, such as stairs, a lift or height
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll talk you through the work before giving you a price.
Common questions in South Hampstead
Is parking a problem for a job in South Hampstead?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Do you work for landlords with property near South Hampstead station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we will send you a clear quote.
Where is Mr Mastic based?
We’re based in Crawley, and we cover South East England, London and all of Scotland.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints.
Is it OK to seal over old sealant?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Can I do it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Is commercial work guaranteed?
Yes. Our 12-month guarantee covers commercial work too.
Can the hotel stay open while you work?
Yes. We work through rooms in batches, keeping most rooms available. Each room comes back with its cure time for housekeeping.
Commercial sealant in South Hampstead: local notes
London’s water is hard, so limescale builds up on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in. There are hotels and other places to stay in and around South Hampstead. For hotels, a room-by-room programme keeps most rooms in use while the work goes on.
For site and facilities teams at buildings such as The UCL Academy, washroom and kitchen sealant can be programmed around term times or opening hours. Community buildings like Church of All Souls are part of the picture too: its kitchen and washroom sealant needs looking after like anywhere else.
South Hampstead is about 1 mile south of Hampstead, in Greater London. If you need commercial sealant in South Hampstead, please call 0345 464 0079 or send us an email for a quick quote. We cover Greater London from our Crawley base. Our area takes in 764 places across Greater London, large and small.
Our applicators cover all of the NW3, NW8 and NW6 postcode area for commercial sealant and the streets around it. You’ll find streets such as Avenue Road, Acacia Road and Harben Road, all of which we cover. We also cover Swiss Cottage (1 mile north), St John's Wood (1 mile south), Haverstock (1 mile east), Belsize Park (1 mile east) and Primrose Hill (1 mile east). Further out, we also cover London (4 miles south-east), Kensington (3 miles south-west), St Pancras (3 miles south-east), Shoreditch (4 miles east), Walthamstow (7 miles north-east) and Hoxton (4 miles east).
What’s near South Hampstead
Around South Hampstead, our work takes us to homes and buildings near Cafe Med pub, St. Mary's Town and Country School and Holy Trinity CofE Primary School. Nearby too are Cecil Sharp House (1.1 miles east) and Primrose Hill (0.6 miles east). South Hampstead has its own railway station: South Hampstead station. Well-known places in the area include Isokon Gallery (0.8 miles north-east) and O2 Centre (0.5 miles north-west). Green spaces nearby include Adelaide Nature Reserve and The Long Water.
Nearby places to South Hampstead
Other services in South Hampstead
Should I try it myself first?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
When to call us in South Hampstead
Internal washrooms and en suites without a window rely entirely on extraction, so if the fan is weak, steam lingers and the sealant stays damp. That is when black mould sets into the bead.
Look out for these signs:
- Joints that need doing before an inspection or audit
- Rental bathrooms that need resealing between tenants
- Mouldy washroom sealant that staff and guests notice
- Worktop sealant that has shrunk and stained
South Hampstead is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
What your quote should include
- What the quote includes, VAT included or not
- How the joint is cleaned and prepared
- When the joint can take water or movement
- What guarantee comes with the work
What happens on the day
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and tidy away. Most jobs take a morning for a small washroom, and a planned programme for bigger sites. In a London area like South Hampstead, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We walk the site with you and agree the rooms, the order and the hours.
- Room by room, we protect the area and remove all the old sealant.
- We clean the joints, treat any mould and let them dry.
- Anti-fungal sanitary silicone goes into wet areas, with suitable sealants elsewhere.
- Each room is checked and handed back with its cure time.
Before we arrive
- Keep children and pets away from the work area
- Tell us if parking is tricky
- For business premises, tell us about site rules or sign-in
Getting a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.