Greater London · England
Remedial Sealant in Bankside
Remedial sealant across Bankside and nearby, with old sealant always removed completely and a one-year guarantee.
- Repeat leaks from the same joint
- Dark patches showing through the sealant
- Floor or wall movement joints that have failed
Remedial sealant in Bankside
Not every leak is a sealant leak. Cracked trays, leaking wastes and faulty valves often look like a sealant problem. If that’s what we find, we will tell you rather than reseal something that will not fix it. Common call-outs are for mould trapped under a layer of silicone and wide, uneven beads that look worse than the old ones, on mouldy bath & shower sealant, botched or over-sealed joints and expansion joints.
Across London, a large share of homes are flats, conversions or mansion blocks, and many bathrooms sit right above someone else’s ceiling. In Bankside, that is a good reason to put tired sealant and grout right early.
All our work is covered by our one-year guarantee, wherever you are in Greater London.
- Place
- Bankside (SE1, EC4Y, EC4V)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Bathrooms and kitchens in Bankside
London has a lot of flats and conversions, and a failed shower or bath seal in one can show up on the ceiling below, which is why it’s worth fixing early. Bankside has hotels and guest accommodation nearby. Hotel bathrooms are part of our work as well as homes, and can be done room by room.
For landlords with property near London Blackfriars station, botched sealant from a previous quick fix is easier to strip out between tenants. Bankside is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Bankside is about 1 mile north of London, in Greater London. Jobs in Bankside get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 764 places across Greater London, large and small.
Every address in SE1, EC4Y and EC4V is covered for remedial sealant. You’ll find streets such as Bear Lane, Bush Lane and Swan Lane, and we cover them all. Bankside sits on or near the A201 and A300, so getting to you is simple. We also cover the places around Bankside: Blackfriars (1 mile north-west), Temple (1 mile north-west), Temple Bar (1 mile north-west), Waterloo (1 mile south-west) and Smithfield (1 mile north). Further out, we also cover Kensington (4 miles west), Walthamstow (6 miles north-east), Hampstead (5 miles north-west), Ruislip (14 miles west), Brompton (3 miles west) and Stockwell (3 miles south).
Local landmarks in Bankside
Locally, jobs take us to homes and businesses close to St Mary-at-Hill, Bernie Spain Gardens and St Andrew's and St John's Church of England Primary School. Other local landmarks include Barts Health Archives (0.6 miles north), The Cathedral School of St Saviour and St Mary Overy (0.5 miles south-east) and Founders Arms (within half a mile west). Bankside has its own railway station: London Blackfriars station. Nearby you will also find Royal Waterloo Hospital for Children and Women (0.6 miles west) and Gabriel's Wharf (less than half a mile west). Open spaces near Bankside include Ludgate Hill and Barnsbury Wood.
Different surfaces, different methods
Over-sealed & botched joints
Every layer has to come out, including the smears and film on surrounding tiles. New sealant needs a fully clean surface.
Leaking trays & enclosures
Repeat shower leaks often come from a tray that flexes or an enclosure sealed in the wrong place. We check both before any new sealant goes on.
Why deal with it now?
Repeat failures have a cause. Taking time to find the cause, whether it’s movement, a leak or the wrong product, is what stops it happening again. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Why us?
- Colour agreed with you before we start
- Any old sealant cut out fully, not covered over
- Sealant colour chosen to suit
- 4.9 on Google from 180+ five-star reviews
Read how sealant jobs are priced or our reviews.
Places near Bankside
Other services in Bankside
Common problems we fix in Bankside
How a joint is built matters as much as the product. A bead bonded on three sides, or laid too thick, can’t flex, so it tears when the joint moves. Backing sets the depth and stops that.
Any of these means the joints need attention:
- Black mould underneath the bead
- Leaks that keep coming back after resealing
- Wide, uneven beads that look worse than the old ones
- Movement joints that have split or pulled away
If you look after a building such as London Nautical School, we reseal washrooms and kitchens in schools and businesses as well as homes.
Comparing quotes
- Who turns up on the day
- How hidden problems are handled
- What product goes in the joint
- Is the old sealant removed completely?
Landlord and commercial work in Bankside
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
DIY sealant or a professional job?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Common questions in Bankside
Is parking a problem for a job in Bankside?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Do you work in hotels near Bankside?
Yes, hospitality work, including hotels, is part of what we do. Jobs can be programmed room by room, with out-of-hours working possible to arrange.
Can I choose the sealant colour?
Yes. White, clear and grey are common, and other colours are available, and we agree the colour with you before we start.
Can old silicone be taken off without scratching the tiles?
Yes. We take our time over removal, especially on acrylic, enamel and uPVC.
Where do you work from?
Mr Mastic is based in Crawley. Our applicators cover Bankside.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done.
Do the sealants smell?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
Does someone need to be in?
It depends on the job. For work indoors, someone needs to let us in, and for outside work we’ll agree access with you when we book.
How we quote for remedial sealant
We quote each job individually. These are the things that affect it:
- When we can work, for business premises
- The old material and how stubborn it is
- Whether the work is at height
- Which sealant suits the joint
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- Any access issues, like height or stairs
- The type of property
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or drop us an email with the details, and pictures are welcome.
The process
All our tools and materials come with us in the van. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours for a typical bath or shower, longer where several layers have been applied. For a job in Bankside, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- The failure is looked at first, so we know whether it’s sealant, movement or water from elsewhere.
- Each layer is cut out and the residue cleaned off.
- We treat any mould and dry the joint thoroughly.
- The right product goes in, with backing where the joint moves.
- We finish neatly and point out anything that needs another trade.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Let us know about stairs, lifts or work at height
- Let us know about parking restrictions
Getting a quote
Want a quote for remedial sealant? Please call 0345 464 0079 or drop us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.