Greater London · England
Remedial sealant & repairs in South Bank, Greater London
Specialist remedial sealant for South Bank: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Smears and lumps from a botched reseal
- Worktop sealant that has shrunk and split
- Movement joints that have split or pulled away
About our remedial sealant in South Bank
A movement joint stops working when its sealant splits or sets hard. We cut out the failed sealant and set the depth with backing, then a flexible sealant matched to the movement goes in. If you have kitchen joints letting water behind the worktop and products that weren’t meant for the joint, we can put it right.
London homes include a lot of flats, conversions and mansion blocks, so a bathroom is often directly above a neighbour’s ceiling. That makes worn sealant and cracked grout in South Bank more than a cosmetic job.
Every job is covered by a one-year guarantee, wherever you are in Greater London.
- Where
- South Bank (SE1, WC2E, WC2N)
- Region
- Greater London
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and tidy away. It generally takes a few hours for most joints, depending on how much old sealant has to come out. In South Bank, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- We protect the surfaces around the joint.
- Every layer of failed sealant is stripped out.
- The joint is degreased and checked for movement and leaks.
- Once dry, a suitable sealant is applied and tooled.
- You get the cure time and our view on why the joint failed.
Before we arrive
- Clear items away from the joints we are working on
- Plan for the work area to be out of bounds to pets and children
- On commercial sites, let us know about site rules
Get a quote
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job, and we’ll come back to you with a quote.
Related advice
How we quote for remedial sealant
The quote reflects the job in front of us. We look at:
- Working hours on commercial sites
- The old material and how stubborn it is
- How many areas need sealing
- Whether there’s mould to deal with
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first.
Asking for a quote
Before you ask for a quote, have a think about:
- The rough size of the job
- If it’s domestic, commercial or a hotel
- Photos by email, if that is easy
- Any access issues, like height or stairs
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 is easy.
Do you need remedial sealant in South Bank?
How a joint is built matters as much as the product. Sealant packed too deep, or stuck to the back of the joint as well as the sides, cannot stretch, and tears at the first real movement. Backing sets the depth and stops that.
Look out for any of the following:
- A shower that leaks however often it’s resealed
- Mould trapped under a layer of silicone
- Sealant that came away because the surface wasn’t prepared
- Smears and lumps from a botched reseal
For an older house near a landmark such as St John's Church, bathrooms in older houses have often been refitted more than once, with sealant laid over sealant.
Comparing quotes
- Is the old sealant removed completely?
- What happens if they find a problem under the old sealant
- How long to leave it before use
- Whether the sealant suits the joint
DIY sealant or a professional job?
If you are set on DIY, put the effort into 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.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Nearby places to South Bank
What else we do in South Bank
FAQs for South Bank
Is parking a problem for a job in South Bank?
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.
Can worn sealant in a flat in South Bank cause a leak downstairs?
Yes, and the first sign is often a stain on the ceiling below. Cutting out the old sealant and laying a new bead early stops it getting that far.
Do you come to South Bank?
Yes. We are based in Crawley and work across South East England, London and Scotland.
Can you work on commercial sites?
Yes. Larger jobs can be planned room by room or area by area.
Can you take off two layers of silicone?
Yes. It’s slower than a standard reseal, because every layer has to come out cleanly, but it’s what makes the new bead last.
Can old silicone be taken off without scratching the tiles?
Yes. Careful removal is most of a remedial job, particularly on softer surfaces like acrylic.
Can I choose the sealant colour?
We help you choose a colour that suits, from white and clear to greys and other shades. The choice depends on the product the joint needs.
How long does remedial resealing take?
Allow a few hours, depending on how many layers have to come out. We will give you a timescale when we quote.
Why act early in South Bank
It’s easy to scratch acrylic, enamel or an uPVC frame cutting out old sealant, and the residue left behind stops the next bead bonding. Careful removal is most of a remedial job. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble.
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, phone 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Why choose Mr Mastic in South Bank
- We never seal over old sealant
- Trusted Arbo and Everbuild sealants
- Colour picked to suit the job
- Tidy, careful work
Read our cost guide and what customers say.
How to look after the new joints
After the cure time, these simple habits help:
- Have loose fittings fixed before resealing
- Keep movement joints clear of mortar and paint
- Keep an eye on the ceiling below the bathroom
- Keep the room well ventilated
Give the new sealant its full cure time: follow the cure time we give you.
Movement joints that have split let water into the structure, and left long enough, the edges of the joint can crumble. Resealing while the edges are sound is simpler.
What the job involves on each surface
Leaking trays & enclosures
If the tray is cracked, or the leak is from the valve or waste, sealant won’t fix it. We say so rather than reseal.
Movement & expansion joints
Joints filled with mortar, grout or rigid filler can’t move. Where it can be raked out, we replace it with flexible sealant.
Bathrooms and kitchens in South Bank
London’s water is hard, which leaves limescale on sealant, grout and taps, and it has to be cleaned off before new sealant goes in. London has a lot of flats and conversions, and a failed shower or bath seal in one can show up on the ceiling below, so tired sealant is best dealt with early.
If you let a flat or house near London Waterloo station, a joint that keeps failing is best fixed properly while the property is empty. Schools such as Oasis Academy Johanna are buildings too, and its toilets, changing areas and kitchens need their sealant renewed like any other building’s.
South Bank is about 1 mile west of London, in Greater London. We provide remedial sealant to homes and businesses in South Bank and nearby. South Bank is one of 764 places in Greater London we cover for remedial sealant.
We cover every part of the SE1, WC2E and WC2N postcode area for remedial sealant and the streets around it. Local streets include York Road, Spur Road and Lower Road. You will find South Bank on the A301 and A302, which makes it straightforward to reach with everything needed for remedial sealant. If you are just outside South Bank, we 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).
Landmarks near South Bank
Locally, jobs take us to homes and businesses close to Jubilee Gardens, The Hole In The Wall pub and The BFI Reuben Library and the streets around them. Nearby too are St Andrew's and St John's Church of England Primary School (under half a mile east) and London Nautical School (within half a mile north-east). There’s a railway station in South Bank itself: London Waterloo station. Other landmarks nearby include Florence Nightingale Museum (under half a mile south) and Royal Waterloo Hospital for Children and Women (under half a mile north-east). Open spaces near South Bank include Barnsbury Wood and St. James's Park Lake.