Greater London · England
Remedial Sealant in Dulwich Village
Removing failed, mouldy or leaking sealant and putting it right for householders, landlords and businesses in Dulwich Village. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- A shower that leaks however often it’s resealed
- Beads that never stuck properly
- Floor or wall movement joints that have failed
Remedial sealant in Dulwich Village, done properly
Decorators’ caulk in a shower, bathroom silicone on a window, a rigid filler in a movement joint fails however neatly it’s applied. We take it out and use a sealant made for that joint. We work on leaking tray & enclosure joints, shrunken worktop sealant and failed movement joints, and people most often call us about leaks that keep coming back after resealing and kitchen joints letting water behind the worktop.
London’s water is hard, so limescale builds up along sealant lines, in grout and on fittings. In Dulwich Village, remedial sealant is as much about a room looking cared for as about keeping water out.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Dulwich Village (SE22, SE21, SE24)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Dulwich Village: your questions answered
Do you work for landlords with property near North Dulwich station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear quote.
Can parking be tricky for a visit in Dulwich Village?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Can you remove old sealant without damaging the bath?
Yes. We cut and lift the old sealant with tools suited to the surface, then clean off the residue. Any existing damage is pointed out before work begins.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Is remedial work guaranteed?
Yes. You get our 12-month guarantee, and we’re fully insured.
What do you need from me for a quote?
A short description and the location, plus pictures if you have them. We’ll ask anything else we need to know.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Do you fix expansion and movement joints?
Yes. Where mortar or filler has been used instead of sealant, it’s removed where it can be, and reseal with a flexible product.
How the job changes by surface
Worktops & kitchens
Old kitchen sealant pulls back from the wall over time. We strip it, degrease the joint and reseal in a colour to suit.
Over-sealed & botched joints
Thick, smeared sealant looks messy and hides problems. Taking it back shows what’s underneath, then reseal neatly.
Remedial sealant around Dulwich Village
London has hard water, so limescale builds up on sealant, grout and fittings. 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.
Letting a property close to North Dulwich station? Then botched sealant from a previous quick fix is easier to strip out between tenants. If you live in an older home near St Barnabas' Church, bathrooms in older houses have often been refitted more than once, with sealant laid over sealant. If you look after a building such as Dulwich Hamlet Junior School, washroom and kitchen sealant there needs the same care as at home, and schools and businesses are part of our work as well as homes.
Dulwich Village is about 1 mile south-east of Herne Hill, in Greater London. Dulwich Village gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. 764 places in Greater London are on our list, large and small.
All of SE22, SE21 and SE24 is covered for remedial sealant, from the main roads to the quietest streets. You will find streets such as Court Lane, Druce Road and Turney Road, and we cover them all. Main roads around Dulwich Village include the A2216. Neighbouring places we cover for remedial sealant include Dulwich (1 mile south-east), Herne Hill (1 mile north-west), East Dulwich (1 mile north), West Dulwich (1 mile south) and Denmark Hill (1 mile north). We also work in nearby towns such as 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 (5 miles north).
Local landmarks in Dulwich Village
Around Dulwich Village, our work takes us to homes and buildings near Alleyn's School, The Crown and Greyhound pub and The Charter School and the streets around them. There’s a railway station in Dulwich Village itself: North Dulwich station. Other landmarks nearby include Lewisham Shopping Centre (3.2 miles east) and Greenwich Castle (4 miles north-east). Green spaces nearby include Knight's Hill and Centre for Wildlife Gardening.
Quotes for remedial sealant in Dulwich Village
You’ll get a clear quote before we start. It’s based on:
- How much there is to do
- Access and height
- Any mould that needs treating
- When we can work, for business premises
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Asking for a quote
What to tell us when you ask for a quote:
- Where the job is, and your postcode
- Any previous sealing or DIY work
- The rough size of the job
- How we’d reach the joints
Getting a quote is simple: let us know what needs doing and where. A few photos by email make the job easier to understand, and we’ll come back to you with a quote.
Why it’s worth doing now in Dulwich Village
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. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Dulwich Village, the repair is bigger than the sealant job would have been.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Why book with us
- One-year guarantee on every job
- ARBOMaster approved applicator
- Anti-fungal sanitary silicone in wet areas
- We never seal over old sealant
Read what affects the cost or what customers say.
Also near Dulwich Village
What else we do in Dulwich Village
Can I do it myself?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
What we cannot put right
A few problems are outside what sealant work can do:
- A bath, tray or worktop that moves until it’s properly fixed
- Tiles that have come away from the wall
- Sealant in an older building that needs testing for asbestos first
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 Dulwich Village
- Mouldy bath & shower sealant
- Botched or over-sealed joints
- Expansion joints
- Shrunken worktop sealant
- Failed movement joints
- Leaking tray & enclosure joints
Keeping the joints in good condition
After the cure time, these simple habits help:
- Keep bleach and abrasives off the bead
- Keep an eye on the ceiling below the bathroom
- Find out why the sealant failed first
- Do not add new sealant on top of old
Keep the room ventilated: use the extractor or open a window after showering.
Mould trapped under over-sealed joints spreads unseen. By the time it shows through, the joint is well past saving.
How it works
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes a few hours, depending on how many layers have to come out. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Dulwich Village. It helps if you can point us to a visitor permit or a bay close to the door.
- Surrounding tiles, trays and frames are protected first.
- The botched or failed sealant is cut away completely.
- The joint is degreased and checked for movement and leaks.
- Once dry, a suitable sealant is applied and tooled.
- We give you the cure time and explain what caused the failure.
How to prepare
- Clear items away from the joints we’re working on
- Tell us if parking is tricky
- Try not to wet indoor joints just before the visit
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved before giving you a price.