Greater London · England
Remedial sealant & repairs in New Charlton, Greater London
Our applicators work in New Charlton on removing failed, mouldy or leaking sealant and putting it right. Old material cut out, joints cleaned and sealed neatly.
- Products that weren’t meant for the joint
- A second bead peeling off the first
- Repeat leaks from the same joint
Bathrooms and kitchens in New Charlton
New Charlton has hotels and guest accommodation nearby. Hotel bathrooms are part of our work as well as homes, and can be done room by room. 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.
Managing a site like Royal Greenwich Trust School? Then 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. In the older streets around St Catherine Labouré, bathrooms in older houses have often been refitted more than once, with sealant laid over sealant.
New Charlton is about 2 miles north-east of Greenwich, in Greater London. New Charlton gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across Greater London, we cover 764 places, New Charlton among them. Our London page covers work nearby (6 miles or so).
Every address in SE7, SE18 and E16 is covered for remedial sealant. If you need remedial sealant at a property on Floyd Road, Priolo Road and Hasted Road or anywhere close by, our applicators can take on the job. Nearby, we also carry out remedial sealant in Charlton (1 mile south-east), Westcombe Park (1 mile south-west), Woolwich (1 mile east), Vanbrugh Park Estate (1 mile south-west) and Maze Hill (2 miles south-west). Larger places within reach include London (6 miles west), City of Westminster (8 miles west), Marylebone (8 miles west), Kensington (10 miles west), St Pancras (7 miles west) and Shoreditch (5 miles north-west).
Landmarks near New Charlton
Typical jobs here are in homes near Thames Barrier Park, Thorntree Primary School and The Victoria pub. New Charlton has its own railway station: Charlton station. Nearby you will also find Charlton Athletic Museum (less than half a mile south) and Greenwich Castle (1.9 miles south-west). Open spaces near New Charlton include Gilbert's Pit.
How we handle remedial sealant in New Charlton
Some sealant jobs are not a simple reseal, because someone has already had a go. New sealant over old, smeared beads, unsuitable products and hidden mould all have to come out before the joint can be done properly. Typical jobs include worktop sealant that has shrunk and split and a shower that leaks however often it’s resealed, on shrunken worktop sealant, expansion joints and failed movement joints.
In much of London, period terraces have been converted into flats over the years, with bathrooms fitted into whatever space was available. A compact bathroom that steams up every day is hard on silicone and grout, and homes in New Charlton are no different.
All of our work is guaranteed for twelve months.
- Where
- New Charlton (SE7, SE18, E16)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What happens if it’s left?
Leaks that are left keep doing damage out of sight: soaked floorboards, ceiling stains below and blown plaster. Dealing with the joint now is a small job by comparison. 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 New Charlton, the repair is bigger than the sealant job would have been.
Combining jobs into one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll give you a clear quote for the lot.
Why choose Mr Mastic in New Charlton
- Old sealant always removed completely
- Trusted Arbo and Everbuild sealants
- Sealant colour chosen to suit
- You choose the colour before work begins
See our cost guide and our reviews.
What affects the quote in New Charlton
There’s no set price list, because no two jobs are the same. What we look at:
- How easy the joints are to reach
- Working hours on commercial sites
- The number of rooms or windows
- The product the joint needs
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
What we need to know
There’s no need for technical detail. Just tell us:
- If someone has resealed it before
- Whether it’s a home or a business
- What’s wrong with the joints now
- Access, such as stairs, a lift or height
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.
Nearby places to New Charlton
Other services in New Charlton
What happens on the day
Most of a good job is in the preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. In total, it generally takes a few hours for a typical bath or shower, longer where several layers have been applied. For a job in New Charlton, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- 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
- Mention any parking rules near the property
- Keep pets and children clear of the area while we work
- Tell us about any water getting in
Ask for a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work and give you a clear quote.
Read more
DIY versus a professional finish
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Common problems we fix in New Charlton
One of the commonest remedial jobs is sealant on top of sealant. Silicone doesn’t bond to silicone, so the top layer lifts and water and mould collect between the two.
These are the problems we’re asked about most:
- Wide, uneven beads that look worse than the old ones
- Dark patches showing through the sealant
- Over-sealed joints coming away
- Movement joints that have split or pulled away
New Charlton is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Before you book anyone
- Are they insured?
- What preparation is included
- What guarantee comes with the work
- Whether they seal over old material or remove it
What the job involves on each surface
Movement & expansion joints
A movement joint must be able to stretch. We remove the failed sealant, fit backing and reseal.
Windows & doors
Wrong-coloured or messy mastic can be replaced for appearance too, in a colour that suits the frame.
Landlord and commercial work in New Charlton
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
For anyone letting property in or around New Charlton, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
Questions from New Charlton
I let a flat near Charlton station. Can you help?
Yes, we work for landlords and letting agents. Just call 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Is parking a problem for a job in New Charlton?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
Can you take off two layers of silicone?
Yes. It’s slower than a standard reseal, because every layer has to come out cleanly, but it’s what makes the new bead last.
Does remedial work come with a guarantee?
Yes. Our 12-month guarantee covers the work, and we are ARBOMaster approved.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Can failed expansion joints be resealed?
Yes. Failed movement joints are cut out and resealed with backing and a flexible sealant suited to the movement.