Greater London · England
Selsdon Remedial Sealant
Remedial sealant in Selsdon from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Sealant peeling off a dusty or damp surface
- Smears and lumps from a botched reseal
- Torn expansion joints
Leave it or put it right?
Another bead over the top won’t fix a failed joint. It doesn’t grip the old layer, so the leak carries on and there’s now more to remove. 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.
What it costs depends on how much there is to do, how much old material has to come out and access to the work. We give a clear quote before any work starts, so you know where you stand.
Why us?
- Neat joints and a tidy finish
- An ARBOMaster approved applicator
- Over 20 years’ experience
- Experience in homes, commercial sites and hotels
Remedial sealant in Selsdon, done properly
The wrong product in the wrong joint won’t last, however tidy it looks. We take it out and use a sealant made for that joint. If you have repeat leaks from the same joint and smears and lumps from a botched reseal, we can help, whatever the surface. Whether you are looking for a mastic company, a sealant applicator or a sealant company in Selsdon, Mr Mastic can help.
Across London, a large share of homes are flats, conversions or mansion blocks, so a bathroom is often directly above a neighbour’s ceiling. In Selsdon, that is a good reason to put tired sealant and grout right early.
All of our work is guaranteed for twelve months.
- Place
- Selsdon (CR2, CR0)
- Region
- Greater London
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 07833 053749
- Updated
- 26 October 2026
What remedial sealant looks like in Selsdon
London has hard water, 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.
For landlords with property near Sanderstead station, a joint that keeps failing is best fixed properly while the property is empty. As a London address, Selsdon can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Selsdon is about 2 miles south-east of Croydon, in Greater London. Every kind of property in Selsdon can book us for remedial sealant, old or new, large or small. The work is guaranteed for a year. Our Greater London coverage runs to 786 places, and Selsdon is one of them.
Every address in CR2 and CR0 is covered for remedial sealant, from the main roads to the quietest streets. That includes homes and businesses on York Road, Byron Road and Abbey Road. We also cover the places around Selsdon: Forestdale (1 mile east), Addington (1 mile north-east), Sanderstead (1 mile south-west), Coombe (1 mile north-west) and Farleigh (2 miles south-east). Further out, we also cover London (11 miles north), City of Westminster (12 miles north), Marylebone (13 miles north), Kensington (12 miles north-west), St Pancras (13 miles north) and Shoreditch (13 miles north).
What’s near Selsdon
In Selsdon, that means homes and buildings near Royal Russell School, The Sir Julian Huxley pub and The Quest Academy. For rail, the closest station is Sanderstead station, roughly 1.7 miles west of the centre. A little further out are St George's Walk (2.7 miles north-west) and Croydon Airport Visitor Centre (2.9 miles west). Open spaces near Selsdon include Duppas Hill and Bramley Bank.
Nearby places to Selsdon
Also in Selsdon
Different surfaces, different methods
Windows & doors
Wrong-coloured or messy mastic can be replaced for appearance too, matched to the frame colour.
Leaking trays & enclosures
Repeat shower leaks often come from a tray that flexes or an enclosure sealed in the wrong place. Both are checked before we reseal.
How it works
At the end, we look at the finished work together and tell you how long to leave it. The visit itself normally takes a few hours for a typical bath or shower, longer where several layers have been applied, depending on the size of the job. In Selsdon, 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.
- The failure is looked at first, so we know whether it’s sealant, movement or water from elsewhere.
- Each layer is cut out and the residue cleaned off.
- We treat any mould and dry the joint thoroughly.
- The right product goes in, with backing where the joint moves.
- We finish neatly and point out anything that needs another trade.
How to prepare
- Let us know if you’ve seen damp or leaks
- For business premises, tell us about site rules or sign-in
- Clear the area around the work
Ask for a quote
We do not publish a price list. Instead, we send you a clear quote for your job. To get started, call 07833 053749 or email us.
Advice
Landlord and commercial work in Selsdon
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.
Questions from Selsdon
I live in a flat in Selsdon. Can a failed seal leak into the flat 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.
Can parking be tricky for a visit in Selsdon?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
How much does remedial sealant cost in Selsdon?
It depends on the job, so we quote each one individually. For a quick quote, ring 07833 053749 or email us with a short description of the job.
What if the leak is not the sealant?
Then we explain what we have found. A plumber or fitter may be needed.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Selsdon, along with the rest of our area.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages.
Do you work for letting agents?
Yes, we do. Domestic, commercial and hotel work are all part of what we do.
How long before the joint can be used?
It depends on the product. We tell you how long to leave it before we go.
What sealant work cannot fix
Before you book, it’s worth knowing the limits too:
- Old mastic in a building from before 2000 that should be checked for asbestos before it’s disturbed
- A tray or bath that is cracked
- Water damage behind tiles that needs a tiler
If in doubt, ring 07833 053749 or drop us an email and we will say what we think.
Where we work in Selsdon
- Botched or over-sealed joints
- Expansion joints
- Failed movement joints
- Leaking tray & enclosure joints
- Mouldy bath & shower sealant
- Shrunken worktop sealant
Looking after it afterwards
Looking after new joints is easy:
- Always have old sealant cut out, not covered
- Report a tray that rocks or a worktop that lifts
- Do not point over movement joints
- Keep the room well ventilated
Keep the room ventilated: run the fan during and after showers, or open a window.
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.
Do you need remedial sealant in Selsdon?
Silicone only bonds to surfaces that are clean and dry. Soap film, dust, damp or old residue stop it gripping, so it starts lifting sooner than it should.
Keep an eye out for any of the following:
- Leaks that keep coming back after resealing
- Beads that never stuck properly
- A second bead peeling off the first
- Caulk or the wrong sealant used in a wet area
Homes close to St Francis include some older properties, and older homes can move a little, which is hard on rigid grout and tired sealant.
Comparing quotes
- How much experience the applicator has
- What product goes in the joint
- Which colour the sealant will be
- How the surfaces are prepared before sealing