Greater London · England
South Bank New Build Mastic
Professional new build mastic in and around South Bank, with every bit of old sealant taken out first and a 12-month guarantee.
- Sealant that never bonded to the surface
- Cracked caulk along new skirting
- Worktop and upstand sealant coming away
Common problems we fix in South Bank
Baths and trays settle under load once the home is lived in. If a bath wasn’t filled when it was sealed, the bead is stretched the first time it’s used and can tear.
Look out for these signs:
- Cracked sealant around new window and door frames
- Messy sealant that spoils new finishes
- Gaps behind new kitchen upstands
- Skirting joints opening in the first winter
South Bank is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Before you book anyone
- Whether VAT is included
- Who does the work, and how experienced they are
- Are they insured?
- How the colour is chosen
New build mastic in South Bank, done properly
Building dust is behind a lot of failed new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the sealant actually sticks rather than sitting on a layer of grit. We’re often asked to deal with worktop and upstand sealant coming away and second-fix sealing on new plots, on skirting & floors, plot handovers and windows & doors.
From brand-new flats to converted terraces with new flooring, London has every kind of floor. Every joint between floor, skirting and threshold has to cope with some movement, in South Bank as anywhere.
You are covered for a year from the day we finish. If anything is not right with it, ring 0345 464 0079 or send us an email.
- Place
- South Bank (SE1, WC2E, WC2N)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Leave it or put it right?
A tube of sealant from the DIY shop will not fix the cause: dust, no primer and old sealant left in the joint. Proper removal and preparation are what make it last. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in South Bank, the repair is bigger than the sealant job would have been.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we will explain the quote if you ask.
What you get with us
- We leave the area clean and tidy
- White, clear, grey or another colour, product permitting
- Over 20 years’ experience
- Rated 4.9 stars on Google
Take a look at how sealant jobs are priced and customer reviews.
For landlords and businesses
Letting agents and landlords in South Bank can book us as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
If you manage several properties in or around South Bank, several properties can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Also near South Bank
Other services in South Bank
What happens on the day
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours in a single home. In a London area like South Bank, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- First we work through your snagging list or plot schedule with you.
- We cut out every bit of the failed or messy sealant.
- We clean off dust from the build and prime the surfaces where the product needs it.
- We apply a sealant that suits each joint and tool it to a neat finish.
- Each area is checked and left with its cure time.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Mention any leaks or damp you’ve noticed
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work.
Read more
What affects the quote in South Bank
Your quote is based on your job. We take into account:
- The size of the job
- Which sealant suits the joint
- Mould in or behind the old joints
- How easy the joints are to reach
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and agree the price before starting.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- How we’d reach the joints
- Roughly how big the job is
- If someone has resealed it before
- Where the property is
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or send us an email with the details, and pictures are welcome.
New build mastic in South Bank: local notes
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent.
For new homes near London Waterloo station, it’s worth checking the sealant early, while snags are still fresh.
South Bank is about 1 mile west of London, in Greater London. We carry out new build mastic for homeowners, landlords and businesses in South Bank. We cover 764 towns and villages across Greater London.
Postcode districts we cover here for new build mastic: SE1, WC2E and WC2N. You will find streets such as York Road, Spur Road and Lower Road, and we cover them all. You will find South Bank on the A301 and A302, so it’s easy for us to get to with everything needed for new build mastic. We also cover Waterloo (1 mile south-east), Adelphi (1 mile north-west), Charing Cross (1 mile north-west), Temple (1 mile north-east) and Aldwych (1 mile north). Larger places within reach include Kensington (4 miles west), Walthamstow (7 miles north-east), Hampstead (4 miles north-west), Ruislip (14 miles west), Stockwell (3 miles south) and Orpington (13 miles south-east).
Around South Bank
Around South Bank, our work takes us to homes and buildings near Jubilee Gardens, The Hole In The Wall pub and The BFI Reuben Library, among other places. Also close by are St Andrew's and St John's Church of England Primary School (less than half a mile east) and London Nautical School (less than half a mile north-east). South Bank has its own railway station: London Waterloo station. Nearby you will also find Florence Nightingale Museum (within half a mile south) and Royal Waterloo Hospital for Children and Women (less than half a mile north-east). Green spaces nearby include Barnsbury Wood and St. James's Park Lake.
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Ventilate bathrooms well, especially in the first year
- Don’t seal over failed sealant yourself
- Follow the cure time we give you
- Check bath and shower seals every few months as the house settles
Clean the sealant with a mild detergent and a soft cloth. Keep scourers and harsh chemicals off it as they wear the bead.
If a shower tray or bath seal splits in the first year, look for movement. Have it resealed, and the tray or bath checked, before it gets worse.
South Bank: your questions answered
Is parking a problem for a job in South Bank?
Parking in South Bank, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
I let a flat near London Waterloo station. Can you help?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Can new sealant go on top of the old bead?
No. New silicone won’t bond to old silicone, so sealing over the top fails quickly. The old sealant always comes out first.
How long should I leave it?
That depends on the sealant used, so follow the cure time we give you when we finish.
Why does sealant fail so quickly in new builds?
Lots of new homes see sealant crack early. Rushed application on dusty surfaces makes it worse.
Is there any odour?
Some sealants have a smell while they cure. Opening a window helps.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit.
How long will you be here?
A typical job takes a few hours for most snagging lists, longer for a run of plots, including preparation and clearing up. We’ll confirm how long when we quote.