Greater London · England
Dalston Remedial Sealant
Specialist remedial sealant for Dalston: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Torn expansion joints
- Wide, uneven beads that look worse than the old ones
- Repeat leaks from the same joint
Why act early in Dalston
Remedial work takes longer than a straight reseal, but rarely a lot: it takes a few hours for most joints, depending on how much old sealant has to come out. Compared with chasing the same leak every few months, it’s time well spent. In a flat in Dalston, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, call 0345 464 0079 or email us and we will give you an honest view and a quote.
Why choose Mr Mastic in Dalston
- Sanitary silicone with an anti-fungal additive in wet areas
- Arbo and Everbuild products
- Any old sealant cut out fully, not covered over
- One-year guarantee on every job
Take a look at what affects the cost and customer reviews.
Remedial sealant in Dalston
Getting old sealant out properly is slow, careful work. Every layer is cut out, the residue cleaned off and the joint degreased, without scratching tiles, trays or frames. New sealant only bonds to a clean, dry joint. If you have worktop sealant that has shrunk and split and mould trapped under a layer of silicone, we can help, on leaking tray & enclosure joints, mouldy bath & shower sealant and botched or over-sealed joints alike.
In much of London, period terraces have been converted into flats over the years, and bathrooms were often squeezed into small rooms. Small, steamy rooms are where mould gets into sealant and grout fastest, and homes in Dalston are no different.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Location
- Dalston (E8, N1, N16)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Looking after it afterwards
Looking after new joints is easy:
- Have loose fittings fixed before resealing
- Do not wait for a small gap to become a leak
- Air the bathroom so the sealant can dry
- Do not add new sealant on top of old
If the joint ever needs renewing, have it cut out, not sealed over. New silicone doesn’t bond to old.
Signs to act on: peeling layers, mould showing through the bead, leaks after showering or cracks in a movement joint. Any of them means it’s time for remedial work.
What we do, step by step
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes a few hours for a typical bath or shower, longer where several layers have been applied and we leave things clean and tidy. In Dalston, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We start by checking the joint for movement, leaks and the reason it failed.
- Every layer of old sealant is cut and cleaned out.
- Next, any mould is treated and the joint dried.
- We use the right backing and sealant for any joint that moves.
- Finally we finish the joint and talk you through what we found.
Before we arrive
- Clear the area around the work
- Tell us about any previous sealing or DIY attempts
- Plan for the work area to be out of bounds to pets and children
How to get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that’s easy.
Read more
What affects the cost of remedial sealant
The quote reflects the job in front of us. We look at:
- Whether old sealant or filler has to be cut out
- Whether the work is at height
- Which sealant suits the joint
- The number of rooms or windows
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- How many joints, rooms or windows are involved
- The problem you’ve noticed
- Any previous sealing or DIY work
- Any access issues, like height or stairs
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job.
How the job changes by surface
Worktops & kitchens
Kitchen joints often have grease and cleaning residue deep in them, so cleaning takes longer than in a bathroom before resealing.
Mouldy bath & shower sealant
Mould that has grown into silicone does not clean out for good. The sealant is cut out completely, the joint treated with a mould remover and dried before anti-fungal sanitary silicone goes in.
Bathrooms and kitchens in Dalston
Dalston has hotels and guest accommodation nearby. As well as homes, we work in hotel bathrooms, where resealing and regrouting can be done room by room. In a London flat, water from a failed bath or shower seal can reach the neighbours below, which is why it’s worth fixing early.
If you let a flat or house near Dalston Junction station, a joint that keeps failing is best fixed properly while the property is empty. For site and facilities teams at buildings such as Holy Trinity Church of England Primary School, we reseal washrooms and kitchens in schools and businesses as well as homes. For an older house near a landmark such as Holy Trinity Church, timber floors under older bathrooms flex, so joints need a sealant that moves with them.
Dalston is about 1 mile north-east of Hoxton, in Greater London. Whether you’re in the middle of Dalston or further out, remedial sealant is available for homes and businesses alike. Our area takes in 764 places across Greater London, from the larger towns to small villages.
All of E8, N1 and N16 is covered for remedial sealant. We cover properties on Glebe Road, Forest Road and Boleyn Road. You’ll find Dalston on the A107 and A1207, which makes it straightforward to reach with everything needed for remedial sealant. Other places close to Dalston include Kingsland (1 mile west), De Beauvoir Town (1 mile west), Hackney Central (1 mile east), London Fields (1 mile south-east) and Shacklewell (1 mile north). Within a short drive, we also cover London (3 miles south), City of Westminster (4 miles south-west), Marylebone (4 miles south-west), Kensington (6 miles south-west), Walthamstow (4 miles north-east) and Hampstead (5 miles west).
Around Dalston
Locally, jobs take us to homes and businesses close to Kingsland Secondary School, The Petchey Academy and The Duke Of Richmond Public House. Also close by are Haggerston Park (0.8 miles south) and Bishopsgate Institute Special Collections and Archives (1.9 miles south). Dalston has its own railway station: Dalston Junction station. Nearby you’ll also find Clowns Gallery-Museum (under half a mile west) and Montfichet's Tower (2.6 miles south-west). The countryside around Dalston includes Gillespie Park and Ludgate Hill.
Landlord and commercial work in Dalston
We also work for property managers and facilities teams. Several sites can go on one quote.
Landlords and agents in Dalston can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Common questions in Dalston
Do you work for landlords with property near Dalston Junction station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Could a tired shower seal in my Dalston flat affect the neighbours below?
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.
How long will it take to strip and reseal the joint?
Allow a few hours for a typical bath or shower, longer where several layers have been applied. We will give you a timescale when we quote.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all, and any smell fades as they cure.
Do you come to Dalston?
We do. Our applicators work in Dalston, and the service is the same as everywhere else.
Does remedial work come with a guarantee?
Yes. Our one-year guarantee covers the work.
Can you remove old sealant without damaging the bath?
Yes. We avoid heavy scraping and use the right cleaner for each surface.
Can you fix a reseal that hasn’t worked?
Yes. We’ll take all the sealant out, look for why it failed and reseal it properly.
When it isn’t the sealant
We will not take on work that will not last, so here’s what sealant can’t put right:
- Movement from fittings that aren’t supported
- A leaking trap, valve or supply pipe
- Cracks in the fitting rather than the joint
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Where we work in Dalston
- Expansion joints
- Mouldy bath & shower sealant
- Leaking tray & enclosure joints
- Shrunken worktop sealant
- Failed movement joints
- Botched or over-sealed joints