Greater London · England
Seven Sisters Remedial Sealant
Removing failed, mouldy or leaking sealant and putting it right for Seven Sisters, backed by a 12-month guarantee. Ask us for a quote.
- Wide, uneven beads that look worse than the old ones
- Repeat leaks from the same joint
- Mould trapped under a layer of silicone
Remedial sealant for homes and businesses in Seven Sisters
Remedial jobs in Seven Sisters generally fall into a few patterns: sealant over sealant, mould under the bead, leaks that come back and movement joints that have split. Each is stripped back and done again properly. Typical jobs include leaks that keep coming back after resealing and sealant applied over old sealant that has lifted, on botched or over-sealed joints, shrunken worktop sealant and leaking tray & enclosure joints.
London’s water is hard, so limescale builds up along sealant lines, in grout and on fittings. For a bathroom or kitchen in Seven Sisters, getting the joints right keeps water where it belongs and the room looking clean.
There’s a 12-month guarantee on every job, whatever its size.
- Place
- Seven Sisters (N15, N17, N16)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What the job involves on each surface
Movement & expansion joints
Some movement joints have been filled with mortar or grout. We rake that out where it can be removed and seal with a flexible product.
Leaking trays & enclosures
If the tray is cracked, or the leak is from the valve or waste, sealant will not fix it. We say so rather than reseal.
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Never seal over old silicone
- Have loose fittings fixed before resealing
- Run the fan after every shower
- Use a soft cloth, not a scourer, on silicone
Give the new sealant its full cure time: generally around 24 hours, or as long as we advise.
A failing joint rarely gets better on its own. Every shower or downpour sends more water through, into whatever is behind or below. Sorting it early limits the damage.
What we do, step by step
When we arrive, we look over the joints with you first, so you know exactly what we are doing. Surfaces next to the work are protected before work begins. Most jobs take a few hours for most joints, depending on how much old sealant has to come out. In a London area like Seven Sisters, 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.
- First we work out whether the problem is the sealant, movement or a leak.
- Each layer is cut out and the residue cleaned off.
- Mould is treated and the joint dried.
- The right product goes in, with backing where the joint moves.
- We finish neatly and point out anything that needs another trade.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- Tell us if parking is tricky
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
We quote each job on its own, so start by telling us what you need. Just ring 0345 464 0079 or email us with the details.
Read more
Leave it or put it right?
DIY removal often leaves scratches and a film of residue, and any film left behind stops new sealant sticking. Careful removal is most of a remedial job. 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.
The cost depends on the amount of work, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Why Seven Sisters customers choose us
- Any old sealant cut out fully, not covered over
- White, clear, grey or another colour, product permitting
- 4.9 on Google from 180+ five-star reviews
- Colour agreed with you before work begins
See our cost guide or our reviews.
Honest limits
Before you book, it’s worth knowing the limits too:
- Failed tanking or loose tiles behind the sealant
- Movement from fittings that are not supported
- Old mastic in a building from before 2000 that should be checked for asbestos before it’s disturbed
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think before you book.
Where we work in Seven Sisters
- Shrunken worktop sealant
- Expansion joints
- Botched or over-sealed joints
- Leaking tray & enclosure joints
- Mouldy bath & shower sealant
- Failed movement joints
What remedial sealant looks like in Seven Sisters
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. London has hard water, so limescale builds up on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in.
Rented homes near Seven Sisters station change hands often, and botched sealant from a previous quick fix is easier to strip out between tenants. In the older streets around Church of Holy Trinity, bathrooms in older houses have often been refitted more than once, with sealant laid over sealant.
Seven Sisters is about 2 miles west of Walthamstow, in Greater London. Every kind of property in Seven Sisters is covered for remedial sealant. The work is guaranteed for a year. Across Greater London, we cover 764 places, and Seven Sisters is one of them. London is on our list too, about 6 miles from Seven Sisters.
We work across N15, N17 and N16 for remedial sealant and the streets around it. We cover properties on Ida Road, Elmar Road and Grove Road and the roads around them. Close by, we work in South Tottenham (1 mile north), Tottenham Green (1 mile north), St Ann's (1 mile west), Tottenham Hale (1 mile north-east) and West Green (1 mile west). Larger places within reach include London (6 miles south), City of Westminster (6 miles south-west), Marylebone (5 miles south-west), Kensington (8 miles south-west), St Pancras (4 miles south-west) and Shoreditch (4 miles south).
Near you in Seven Sisters
Locally, jobs take us to homes and businesses close to No.8 Seven Sisters pub, Ada College and Chestnuts Park, among other places. Also close by are Gladesmore Community School (within half a mile east) and Church of St Andrew (0.8 miles south). There’s a railway station in Seven Sisters itself: Seven Sisters station. Other landmarks nearby include Montfichet's Tower (4.9 miles south) and The Mall Wood Green (1.7 miles north-west). Green spaces nearby include Highgate Hill and Woodberry Wetlands.
Signs you need remedial sealant in Seven Sisters
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 rod or bond-breaker tape prevents it.
Signs it’s time to call us include:
- Sealant peeling off a dusty or damp surface
- Worktop sealant that has shrunk and split
- Torn expansion joints
- Decorators’ caulk around a bath or shower
If you look after a building such as Earlsmead Primary School, its toilets, changing areas and kitchens need their sealant renewed like any other building’s.
Before booking anyone
- Is the old sealant removed completely?
- Whether you can choose the colour
- The length of the guarantee
- Whether VAT is included
Questions from Seven Sisters
I let a flat near Seven Sisters station. Can you help?
Yes. We work for landlords and letting agents as well as householders. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Could a tired shower seal in my Seven Sisters flat affect the neighbours below?
It can, yes: water that gets past a split bead or cracked grout often runs under the tray and shows on the ceiling below. Replacing the sealant and grout before that happens is much less trouble than repairing a neighbour’s ceiling.
Do you work in Seven Sisters?
Yes, we do. Our applicators work in Seven Sisters.
How long does the work take?
Allow a few hours, depending on how many layers have to come out. You’ll know the timing when we quote.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us.
Is it worth trying it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Can I add another job to the visit?
Yes. Several rooms, windows or areas can go on one quote.
Can you match 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.
Landlords, agents and businesses in Seven Sisters
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.