Greater London · England

Remedial sealant & repairs in Charlton, Greater London

Remedial sealant in Charlton from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.

  • Sealant applied over old sealant that has lifted
  • Worktop sealant that has shrunk and split
  • A shower that leaks however often it’s resealed

Need remedial sealant in Charlton?

Remedial sealant for homes and businesses in Charlton

In Charlton, as anywhere, remedial jobs tend to look alike: sealant over sealant, mould under the bead, leaks that come back and movement joints that have split. We strip each one back and start from scratch. Common call-outs are for sealant applied over old sealant that has lifted and decorators’ caulk around a bath or shower, across mouldy bath & shower sealant, failed movement joints and shrunken worktop sealant.

In much of London, period terraces have been converted into flats over the years, with bathrooms fitted into whatever space was available. Small, steamy rooms are where mould gets into sealant and grout fastest.

There’s a 12-month guarantee on every job, whatever its size.

Place
Charlton (SE7, SE18)
Region
Greater London
Guarantee
12 months on all our work
Quote
A clear price before work begins
Phone
0345 464 0079
Page updated
26 October 2026
Mr Mastic applicator kneeling beside a white bath, sealing the joint where the bath meets beige wall tiles

Charlton homes and their sealant

London has hard water, which leaves limescale on sealant, grout and taps, and it has to be cleaned off before new sealant goes in. 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 Charlton station? Then a joint that keeps failing is best fixed properly while the property is empty. In the older streets around St Catherine Labouré, walls and floors in older homes can move, and sealant and grout show it first. Schools such as Thorntree Primary School are buildings too, and we reseal washrooms and kitchens in schools and businesses as well as homes.

Charlton is about 2 miles west of Plumstead, in Greater London. Across the SE7 area, we can carry out remedial sealant at your property. Charlton is one of 764 towns and villages in Greater London we cover. There’s also a page for London, about 6 miles away.

Our applicators cover all of SE7 and SE18 for remedial sealant and the streets around it. If you need remedial sealant at a property on Floyd Road, Guild Road and Priolo Road or a nearby road, we can help. We also cover the places around Charlton: New Charlton (1 mile north-west), Westcombe Park (1 mile west), Woolwich (1 mile east), Vanbrugh Park Estate (1 mile south-west) and Kidbrooke (2 miles south). Further out, we also cover 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 (6 miles north-west).

Around Charlton

Around Charlton, our work takes us to homes and buildings near Charlton Park, Wildwood Montessori School and Royal Greenwich Trust School, among other places. Charlton has its own railway station: Charlton station. Nearby you’ll also find British Hospital for Mothers and Babies (0.5 miles east) and Gallions Reach Shopping Park (2.3 miles north-east). The countryside around Charlton includes Gilbert's Pit.

Map of Charlton © OpenStreetMap contributors

Your questions about remedial sealant in Charlton

Is parking a problem for a job in Charlton?

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.

I let a flat near Charlton station. Can you help?

Yes. We work for landlords and letting agents as well as householders. Just call 0345 464 0079 or email us with the address and what needs doing, and we will send you a clear quote.

Do you cover Charlton?

Yes, we do. Charlton is part of the area we cover, and the service is the same as everywhere else.

Are you an approved applicator?

Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.

Do the sealants smell?

Possibly a little. It fades as the sealant cures, and ventilation helps.

How long will it take to strip and reseal the joint?

The number of joints and layers decides it. You’ll have a timescale before any work begins.

How do I get a quote for remedial sealant in Charlton?

The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.

Is it messy?

Very little: the area around the joints is protected first, and we tidy up before we go.

What affects the quote in Charlton

Every job gets its own quote. This is what makes a difference:

  • How many rooms, windows or areas are involved
  • Access and height
  • The amount of work
  • Any working-time requirements on site

There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or drop us an email.

Helping us quote

You don’t need to know the technical terms. It helps if you can tell us:

  • How we’d reach the joints
  • Whether it’s a home or a business
  • The problem you’ve noticed
  • Where the property is

A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.

Landlords, agents and businesses in Charlton

Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we 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.

Surface by surface

Mouldy bath & shower sealant

Black mould inside the bead won’t scrub out. The sealant is cut out completely, the joint treated with a mould remover and dried ahead of a new anti-fungal bead.

Leaking trays & enclosures

When failed joints are the cause, they’re all cut out and renewed, including the screen profile and tray edges.

What we cannot put right

We’ll always be straight with you, so here’s what new sealant will not do:

  • A cracked shower tray or bath (that needs repair or replacing)
  • A bath, tray or worktop that moves until it’s properly fixed
  • Failed tanking or loose tiles behind the sealant

If you’re not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.

Where we work in Charlton

  • Botched or over-sealed joints
  • Leaking tray & enclosure joints
  • Expansion joints
  • Mouldy bath & shower sealant
  • Shrunken worktop sealant
  • Failed movement joints

Aftercare tips

A little care helps the new joints last. We recommend:

  • Clean sealant with mild products only
  • Keep movement joints clear of mortar and paint
  • Act on a lifting corner right away
  • Keep an eye on the ceiling below the bathroom

If we’ve found a cause, such as a loose tray or a leaking waste, get it fixed, because the new sealant can’t hold back a problem underneath.

Leaks through failed sealant grow over time. Each use pushes more water behind the bead, into floors, walls or ceilings. Sorting it early limits the damage.

Why deal with it now?

Repeat failures have a cause. Finding it, whether movement, water from elsewhere or an unsuitable product, ends the cycle. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler for homes in Charlton.

A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.

Why us?

  • You choose the colour before work begins
  • Neat joints and a tidy finish
  • A choice of colours where the product allows
  • Fully insured

Read our cost guide or customer reviews.

How the visit works

We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for most joints, depending on how much old sealant has to come out. In Charlton, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.

  1. Surrounding tiles, trays and frames are protected first.
  2. Every layer of failed sealant is stripped out.
  3. We clean and degrease the joint and look for signs of movement or water.
  4. New sealant goes in once the joint is dry, and is tooled smooth.
  5. We give you the cure time and explain what caused the failure.

Preparing for the visit

  • For business premises, tell us about site rules or sign-in
  • Tell us about any previous sealing or DIY attempts
  • Mention any leaks or damp you’ve noticed

Ask for a quote

For a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. We will send you a clear quote before any work starts.

Get a quick quote

Related advice

20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job