Greater London · England
Remedial sealant & repairs in Coldharbour, Greater London
Removing failed, mouldy or leaking sealant and putting it right for homes and businesses in Coldharbour and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Floor or wall movement joints that have failed
- Sealant that came away because the surface wasn’t prepared
- Decorators’ caulk around a bath or shower
Remedial sealant for homes and businesses in Coldharbour
If a joint has been resealed and is leaking again, it’s worth a proper look. Send pictures when you call 0345 464 0079 or email us, and say how long ago it was last done. If you are dealing with sealant peeling off a dusty or damp surface and worktop sealant that has shrunk and split, we can help, on failed movement joints, mouldy bath & shower sealant and leaking tray & enclosure joints alike.
London homes include a lot of flats, conversions and mansion blocks, so a bathroom is often directly above a neighbour’s ceiling. In Coldharbour, that is a good reason to put tired sealant and grout right early.
Every job is covered by a one-year guarantee, wherever you are in Greater London.
- Where
- Coldharbour (E14, SE10, E22)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Windows & doors
Frames resealed over the top end up with hard, layered mastic. We remove it all and clean back to sound surfaces.
Movement & expansion joints
Some movement joints have been filled with mortar or grout. Where it can be raked out, we replace it with flexible sealant.
How we quote for remedial sealant
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How much old sealant there is and how hard it is to remove
- Working hours on commercial sites
- The product the joint needs
- How many rooms, windows or areas are involved
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- Any access issues, like height or stairs
- If someone has resealed it before
- The problem you’ve noticed
- How many joints, rooms or windows are involved
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we will take it from there.
Honest limits
Before booking, it’s worth knowing the limits:
- A bath, tray or worktop that moves until it’s properly fixed
- Failed tanking or loose tiles behind the sealant
- Older mastics that may need an asbestos check before removal
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
Where we work in Coldharbour
- Mouldy bath & shower sealant
- Botched or over-sealed joints
- Failed movement joints
- Leaking tray & enclosure joints
- Shrunken worktop sealant
- Expansion joints
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Keep the room well ventilated
- Don’t point over movement joints
- Always have old sealant cut out, not covered
- Act on a lifting corner straight away
Give the new sealant its full cure time: follow the cure time we give you.
A split movement joint lets rain into walls and floors, and left long enough, the edges of the joint can crumble. A joint with sound edges is far easier to reseal.
Bathrooms and kitchens in Coldharbour
There are hotels and other places to stay in and around Coldharbour. Hotel bathrooms are part of our work as well as homes, and can be done room by room. London has hard water, which leaves limescale on sealant, grout and taps.
Coldharbour is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Managing a site like Woolmore Primary School? Then we reseal washrooms and kitchens in schools and businesses as well as homes.
Coldharbour is about 2 miles north of Greenwich, in Greater London. Every kind of property in Coldharbour is covered for remedial sealant. The work is guaranteed for a year. 764 places in Greater London are on our list, from the larger towns to small villages.
Work in E14, SE10 and E22 is quoted and booked the same way as anywhere else. If you need remedial sealant at a property on Canada Square, Simpson's Road and Amsterdam Road or anywhere close by, we can help. Main roads around Coldharbour include the A1206 and A1261, which makes travel easy. Nearby, we also carry out remedial sealant in Blackwall (1 mile north-east), London Docklands (1 mile west), Poplar (1 mile north-west), Canary Wharf (1 mile west) and Heron Quays (1 mile west). Further out, we also cover London (4 miles west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (8 miles west), St Pancras (5 miles west) and Shoreditch (3 miles north-west).
Local landmarks in Coldharbour
We work in homes and buildings around Canary Wharf College 3, Mudchute Park and Farm and Tower Hamlets College, among other places. The closest station to Coldharbour is Canary Wharf station, about 0.5 miles north-west. Well-known places in the area include Old Royal Naval College (1.3 miles south) and Poplar Hospital (0.6 miles north). Not far away are Tower Hill and Lavender Pond.
Coldharbour questions
I let a flat near Canary Wharf station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Is parking an issue for remedial sealant in Coldharbour?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Do you work in Coldharbour?
Yes. We work in Coldharbour and the rest of Greater London. For a quote, ring 0345 464 0079 or send us an email.
What if resealing won’t fix my leak?
Then we explain what we have found. You may need a plumber or bathroom fitter.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
Can you match the sealant colour?
Most of the time, yes. We’ll tell you which colours the right product comes in.
Will the old sealant be removed?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Towns and villages near Coldharbour
Other services in Coldharbour
Do you need remedial sealant in Coldharbour?
Water from somewhere else can ruin a good seal. A leaking valve, a failed waste or cracked grout feeds water behind the bead, and the sealant lifts or goes mouldy from underneath.
It’s worth asking for a quote if you see:
- Floor or wall movement joints that have failed
- Products that weren’t meant for the joint
- Smears and lumps from a botched reseal
- A second bead peeling off the first
If you live in an older home near All Saints Church, timber floors under older bathrooms flex, so joints need a sealant that moves with them.
Questions to ask before you book
- What insurance they hold
- What preparation is included
- Which colour the sealant will be
- Whether all the old sealant comes out first
How it works
You don’t need to clear the whole room or building before we come, just the space around the work. We protect the rest, and the job takes a few hours, depending on how many layers have to come out for a typical job. In a London area like Coldharbour, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- The failure is looked at first, so we know whether it’s sealant, movement or water from elsewhere.
- Old beads and residue are removed down to clean surfaces.
- We treat any mould and dry the joint thoroughly.
- We reseal with a product suited to the joint, backed where needed.
- We finish neatly and point out anything that needs another trade.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about earlier repairs to the joints
- Mention any sign-in or site rules at work premises
Getting a quote
Need a quote? Please phone 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Advice
For landlords and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
We work for letting agents and landlords as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.