Greater London · England
Remedial Sealant in Shooter's Hill
Removing failed, mouldy or leaking sealant and putting it right for homes and businesses in Shooter's Hill and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Sealant peeling off a dusty or damp surface
- Floor or wall movement joints that have failed
- Products that weren’t meant for the joint
Remedial sealant in Shooter's Hill, done properly
If a joint has been resealed and is leaking again, it’s worth a proper look. It helps to have photos when you ring 0345 464 0079 or drop us an email, and say how long ago it was last done. Common call-outs are for repeat leaks from the same joint and mould trapped under a layer of silicone, across botched or over-sealed joints, mouldy bath & shower sealant 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.
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.
- Place
- Shooter's Hill (SE18, SE9, DA16)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the work takes a few hours for a typical bath or shower, longer where several layers have been applied in most cases. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- First we work out whether the problem is the sealant, movement or a leak.
- Each layer is cut out and the residue cleaned off.
- We treat any mould and dry the joint thoroughly.
- We reseal with a product suited to the joint, backed where needed.
- The joint is tooled and you’re told about anything else we found.
Preparing for the visit
- Tell us if parking is tricky
- Where the joints are inside, avoid wetting them before we arrive
- For business premises, tell us about site rules or sign-in
How to get a quote
Getting a quote is simple: tell us what needs doing and where. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Read more
Signs you need remedial sealant in Shooter's Hill
Products get mixed up: caulk where it gets wet, rigid sealant where things move, or an acetoxy silicone on a surface it can mark. None of them last.
It’s worth asking for a quote if you see:
- Wide, uneven beads that look worse than the old ones
- Decorators’ caulk around a bath or shower
- Floor or wall movement joints that have failed
- Sealant applied over old sealant that has lifted
Rented homes near Falconwood station change hands often, and failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak.
What to look for in a quote
- Whether the sealant suits the joint
- Whether you can choose the colour
- How much experience the applicator has
- What happens if the job turns out different
Also near Shooter's Hill
Also in Shooter's Hill
What affects the quote in Shooter's Hill
You’ll get a clear quote before any work starts. It’s based on:
- The amount of work
- Mould in or behind the old joints
- When we can work, for business premises
- The product the joint needs
The cost depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
What we need to know
What to tell us when you ask for a quote:
- Photos by email, if that’s easy
- Any access issues, like height or stairs
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
For remedial sealant in Shooter's Hill, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Shooter's Hill homes and their sealant
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. London has hard water, which leaves limescale on sealant, grout and taps, and it has to be cleaned off before new sealant goes in.
As a London address, Shooter's Hill can be tricky for parking: let us know about parking bays, permits or a driveway. For an older house near a landmark such as Christ Church, timber floors under older bathrooms flex, so joints need a sealant that moves with them.
Shooter's Hill is about 1 mile south-west of Plumstead, in Greater London. Homes, rented property, offices and hotels in Shooter's Hill can book us for remedial sealant, old or new, large or small. The work is guaranteed for a year. We cover 764 towns and villages across Greater London, large and small. For nearby work, see our London page.
Postcode districts we cover here for remedial sealant: SE18, SE9 and DA16. Remedial sealant is available to properties on Brent Road, Dover Road and Kinlet Road. Close by, we work in Kidbrooke (1 mile west), Well Hall (1 mile south-west), East Wickham (1 mile east), Avery Hill (1 mile south) and Plumstead (1 mile north-east). Further out, we also cover London (7 miles west), City of Westminster (10 miles west), Marylebone (10 miles west), Kensington (12 miles west), St Pancras (9 miles north-west) and Shoreditch (7 miles north-west).
Near you in Shooter's Hill
In Shooter's Hill, that means homes and buildings near The Bull Public House, Eaglesfield Park and Deansfield Primary School, among other places. For rail, the closest station is Falconwood station, roughly 0.9 miles south-east of the centre. A little further out are Gallions Reach Shopping Park (2.9 miles north) and Greenwich Castle (3 miles west). Open spaces near Shooter's Hill include Summer Hill and Birdbrook Road Nature Reserve.
FAQs for Shooter's Hill
Can worn sealant in a flat in Shooter's Hill cause a leak downstairs?
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.
Can you help a landlord with a rental near Falconwood station?
Yes, we work for letting agents and landlords. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Someone resealed my shower and it’s leaking again. Can you help?
Yes. Repeat leaks generally come from over-sealing, movement or water getting in elsewhere, and we deal with the cause first.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
What should I tell you?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply ring 0345 464 0079 or email us.
Someone sealed over the old bead. Can you fix it?
Yes. We cut out all the layers and clean off the film, before resealing with a single bead.
Can you work on commercial sites?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Why it’s worth doing now in Shooter's Hill
Stripping out botched sealant adds time to a reseal, but rarely a lot: the work takes a few hours, depending on how many layers have to come out. Compared with chasing the same leak every few months, it’s time well spent. 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 Shooter's Hill, 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 and we will talk you through it.
Why us?
- More than 20 years in sealant work
- Experience in homes, commercial sites and hotels
- Tidy, careful work
- Colour agreed with you before work begins
Take a look at what affects the cost and what customers say.
How the job changes by surface
Worktops & kitchens
Shrunken worktop sealant leaves a gap that lets water into the back edge. It’s cut out, degreased and resealed colour-matched to the worktop.
Leaking trays & enclosures
When failed joints are the cause, they’re all cut out and renewed, tray edges and screen profiles included.
When it is not the sealant
We won’t take on work that won’t last, so these are the limits:
- A tray or bath that is cracked
- Sealant in an older building that needs testing for asbestos first
- Tiles that have come away from the wall
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
What we seal
- Failed movement joints
- Botched or over-sealed joints
- Leaking tray & enclosure joints
- Shrunken worktop sealant
- Expansion joints
- Mouldy bath & shower sealant