Greater London · England
East Dulwich Remedial Sealant
Remedial sealant for East Dulwich, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Dark patches showing through the sealant
- Products that weren’t meant for the joint
- Wide, uneven beads that look worse than the old ones
How we handle remedial sealant in East Dulwich
Removing failed sealant is the hardest part of the job. 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. We work on shrunken worktop sealant, failed movement joints and leaking tray & enclosure joints, and people most often call us about caulk or the wrong sealant used in a wet area and torn expansion joints.
London’s water is hard, so limescale builds up along sealant lines, in grout and on fittings. In East Dulwich, remedial sealant is as much about a room looking cared for as about keeping water out.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Place
- East Dulwich (SE5, SE22, SE15)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Quotes for remedial sealant in East Dulwich
Call for a quick quote. The main things that affect it are:
- When we can work, for business premises
- The number of rooms or windows
- The number and length of the joints
- Mould in or behind the old joints
Combining jobs into one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. We will give you a clear price for the lot.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- What’s wrong with the joints now
- How we’d reach the joints
- Any previous sealing or DIY work
- The type of property
If you’re in East Dulwich and need remedial sealant, ring 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before work begins.
Do you need remedial sealant in East Dulwich?
Water from somewhere else can ruin a good seal. A leaking valve, a failed waste or cracked grout feeds water behind the bead, so the silicone goes mouldy or lets go.
Look out for these signs:
- Repeat leaks from the same joint
- Sealant peeling off a dusty or damp surface
- Thick, messy sealant smeared over tiles
- Sealant applied over old sealant that has lifted
If you look after a building such as Dog Kennel Hill School, we reseal washrooms and kitchens in schools and businesses as well as homes.
Before booking anyone
- Which sealant they’ll use, and why
- What happens if the job turns out different
- What preparation is included
- Whether they seal over old material or remove it
Your questions about remedial sealant in East Dulwich
Can you help a landlord with a rental near East Dulwich station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can be quoted together. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Can worn sealant in a flat in East Dulwich cause a leak downstairs?
Yes, and the first sign is often a stain on the ceiling below. A proper reseal before the leak starts is the easy fix.
Can failed expansion joints be resealed?
Yes. Backing sets the depth and stops the sealant sticking to the back, which lets it stretch.
How do I get a quote for remedial sealant in East Dulwich?
Size, access and the old material all affect the cost. Ask us for a quote.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us and we’re fully insured.
How long does remedial resealing take?
A little longer than a standard reseal. For most joints, it’s a few hours, and we confirm the time with your quote.
Will you leave a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Can I choose the sealant colour?
We help you choose a colour that suits. The product needed can limit the range.
The process
You do not need to clear the whole room or building before we come, just the space around the work. Everything nearby is protected, and the work takes a few hours for most joints, depending on how much old sealant has to come out for a typical job. In East Dulwich, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- Surrounding tiles, trays and frames are protected first.
- Every layer of failed sealant is stripped out.
- We clean and degrease the joint and look for signs of movement or water.
- New sealant goes in once the joint is dry, and is tooled smooth.
- We give you the cure time and explain what caused the failure.
How to prepare
- Mention any tricky access
- Mention any leaks or damp you’ve noticed
- Let us know about earlier repairs to the joints
How to get a quote
Need a quote? Please call 0345 464 0079 or email us with a few details. We will explain what we’d do and send you a clear quote before any work starts.
Related advice
What we cannot put right
A few problems are outside what sealant work can do:
- Plumbing leaks behind walls or under trays
- A tray or bath that is cracked
- Older mastics that may need an asbestos check before removal
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
Where we work in East Dulwich
- Shrunken worktop sealant
- Leaking tray & enclosure joints
- Mouldy bath & shower sealant
- Botched or over-sealed joints
- Expansion joints
- Failed movement joints
What remedial sealant looks like in East Dulwich
In a London flat, water from a failed bath or shower seal can reach the neighbours below, so tired sealant is best dealt with early. East Dulwich 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.
For landlords with property near East Dulwich station, a joint that keeps failing is best fixed properly while the property is empty. East Dulwich is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
East Dulwich is about 3 miles south of London, in Greater London. If you need remedial sealant in East Dulwich, please ring 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover Greater London, East Dulwich included. Across Greater London, we cover 764 places, and East Dulwich is one of them.
Postcode districts we cover here for remedial sealant: SE5, SE22 and SE15. That includes homes and businesses on Rye Lane, Wren Road and Adys Road. East Dulwich is on the A2214 and A2215, which makes it straightforward to reach with everything needed for remedial sealant. Close by, we work in Denmark Hill (1 mile north-west), Herne Hill (1 mile south-west), Dulwich Village (1 mile south), Camberwell (1 mile north) and Peckham (1 mile north-east). Further out, we also cover London (3 miles north), City of Westminster (5 miles north-west), Marylebone (5 miles north-west), Kensington (6 miles north-west), St Pancras (5 miles north) and Shoreditch (4 miles north).
Near you in East Dulwich
Typical jobs here are in homes near The Fox on the Hill pub, The Charter School East Dulwich and The Charter School. East Dulwich has its own railway station: East Dulwich station. Nearby you will also find House of Dreams Museum (less than half a mile south-east) and Surrey Quays Shopping Centre (2.8 miles north-east). Not far away are Knight's Hill and Centre for Wildlife Gardening.
Landlord and commercial work in East Dulwich
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Leave it or put it right?
Another bead over the top will not fix a failed joint. It does not grip the old layer, leaving the leak in place and one more layer to cut out later. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble for homes in East Dulwich.
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Why choose Mr Mastic in East Dulwich
- Neat joints and a tidy finish
- Anti-fungal sanitary silicone in wet areas
- Every job guaranteed for a year
- Full insurance on every job
See our cost guide and our reviews.
Also near East Dulwich
What else we do in East Dulwich
Keeping the joints in good condition
Aftercare is simple, and it makes a real difference:
- Report a tray that rocks or a worktop that lifts
- Use a soft cloth, not a scourer, on silicone
- Never seal over old silicone
- Keep an eye on the ceiling below the bathroom
Ventilation keeps mould away from the new bead: run the fan during and after showers, or open a window.
If a joint has failed more than once, stop resealing it. Have someone find out why, otherwise the next attempt will fail too.