Greater London · England
Remedial sealant & repairs in Addiscombe, Greater London
Problem with your failed sealant joints in Addiscombe? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Black mould underneath the bead
- A shower that leaks however often it’s resealed
- Torn expansion joints
What remedial sealant looks like in Addiscombe
London’s water is hard, 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.
If you live in an older home near St Mildred's Church, timber floors under older bathrooms flex, so joints need a sealant that moves with them. Rented homes near Norwood Junction station change hands often, and botched sealant from a previous quick fix is easier to strip out between tenants.
Addiscombe is about 2 miles north-east of Croydon, in Greater London. If you need remedial sealant in Addiscombe, please ring 0345 464 0079 or drop us an email for a quick quote. We are based in Crawley and cover Greater London, Addiscombe included. Addiscombe is one of 764 places in Greater London we cover for remedial sealant. You can also see our page for London, roughly 8 miles from Addiscombe.
All of CR0, SE25 and CR9 is within our area for remedial sealant. If you need remedial sealant at a property on Grant Road, Capri Road and Coe Avenue or a nearby road, we can help. Addiscombe sits on or near the A232. If you are just outside Addiscombe, we cover Shirley Oaks (1 mile east), Ashburton (1 mile north), Woodside (1 mile north), Shirley (1 mile east) and Monks Orchard (1 mile east). Further out, we also cover London (8 miles north), City of Westminster (10 miles north), Marylebone (10 miles north), Kensington (10 miles north-west), St Pancras (10 miles north) and Shoreditch (10 miles north).
Around Addiscombe
We work in homes and buildings around The Woodside Academy, The Cricketers pub and Ashburton Park, among other places. For rail, the closest station is Norwood Junction station, about 1.2 miles north. Well-known places in the area include St George's Walk (1.5 miles west) and Crystal Palace Museum (2.7 miles north). Open spaces near Addiscombe include Duppas Hill and Bramley Bank.
How we handle remedial sealant in Addiscombe
Water on the floor does not always mean failed silicone. Cracked trays, leaking wastes and faulty valves often look like a sealant problem. If that is what we find, we will tell you rather than reseal something that will not fix it. Common call-outs are for mould trapped under a layer of silicone and beads that never stuck properly, across leaking tray & enclosure joints, shrunken worktop sealant and mouldy bath & shower sealant.
Hard London water leaves limescale on sealant, grout and taps alike. In Addiscombe, remedial sealant is as much about a room looking cared for as about keeping water out.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Addiscombe (CR0, SE25, CR9)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Landlords, agents and businesses in Addiscombe
If you manage several properties in or around Addiscombe, several properties can be quoted together. Send us the addresses and the work at each, and pictures by email help.
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.
Why act early in Addiscombe
A failed seal rarely means a new bathroom. When the fittings are sound, stripping and resealing the joints is often enough. Where something else has failed, you’ll hear it from us. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Addiscombe, the repair is bigger than the sealant job would have been.
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts.
Why choose Mr Mastic in Addiscombe
- Experience in homes, commercial sites and hotels
- Colour picked to suit the job
- Any old sealant cut out fully, not covered over
- We leave the area clean and tidy
What happens on the day
We bring everything the job needs with us. Once we have agreed what’s being done, we protect the area and start. It normally 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 Addiscombe. A visitor permit or a nearby bay makes the visit run more smoothly.
- First we work out whether the problem is the sealant, movement or a leak.
- Old beads and residue are removed down to clean surfaces.
- Mould is treated and the joint dried.
- We reseal with a product suited to the joint, backed where needed.
- The joint is tooled and you are told about anything else we found.
Before we arrive
- Let us know if you’ve seen damp or leaks
- For business premises, tell us about site rules or sign-in
- Clear items away from the joints we’re working on
Getting a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
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Places near Addiscombe
Also in Addiscombe
FAQs for Addiscombe
Could a tired shower seal in my Addiscombe flat affect the neighbours below?
Yes, it can. Water that gets past failed sealant or cracked grout can run under the bath or tray and show up on the ceiling below. Replacing the sealant and grout before that happens is much less trouble than repairing a neighbour’s ceiling.
I let a flat near Norwood Junction station. Can you help?
Yes, we work for landlords and agents. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Can I add another job to the visit?
Yes. Several rooms, windows or areas can go on one quote.
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.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
What should I tell you?
Only a few details: where it is, what you’ve noticed and how we reach it. Then ring 0345 464 0079 or send us an email.
Common problems we fix in Addiscombe
Joint depth matters. 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.
Most people get in touch after spotting one of these:
- Smears and lumps from a botched reseal
- Decorators’ caulk around a bath or shower
- Movement joints that have split or pulled away
- Beads that never stuck properly
For site and facilities teams at buildings such as Oasis Academy Shirley Park, we reseal washrooms and kitchens in schools and businesses as well as homes.
What to look for in a quote
- What the quote includes, VAT included or not
- Are they insured?
- The length of the guarantee
- What happens if they find a problem under the old sealant
What the job involves on each surface
Movement & expansion joints
Movement joints in floors, walls and façades need a flexible sealant set to the right depth. Failed sealant is cut out, backing rod or tape is fitted and the joint resealed.
Mouldy bath & shower sealant
Mould that has grown into silicone doesn’t clean out for good. All of it comes out, and the joint is treated and dried ahead of a new anti-fungal bead.
Aftercare tips
After the cure time, these simple habits help:
- Check trays and worktops don’t move
- Ask why a joint failed before redoing it
- Never seal over old silicone
- Keep movement joints clear of mortar and paint
Keep the room ventilated: run the fan during and after showers, or open a window.
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.
Honest limits
Before you book, it’s worth knowing the limits:
- Leaks from a shower valve, waste or pipework (a plumber’s job)
- Older mastics that may need an asbestos check before removal
- A tray or worktop that needs refixing first
If in doubt, call 0345 464 0079 or email us and we will say what we think before you book.
Surfaces we seal
- Failed movement joints
- Mouldy bath & shower sealant
- Expansion joints
- Botched or over-sealed joints
- Leaking tray & enclosure joints
- Shrunken worktop sealant