Greater London · England
Old Coulsdon Remedial Sealant
Professional remedial sealant in and around Old Coulsdon, with every bit of old sealant taken out first and a 12-month guarantee.
- Dark patches showing through the sealant
- Smears and lumps from a botched reseal
- Floor or wall movement joints that have failed
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
About our remedial sealant in Old Coulsdon
If a joint has been resealed and is leaking again, it’s worth a proper look. Send pictures when you ring 0345 464 0079 or email us, along with when it was last resealed. We work on mouldy bath & shower sealant, expansion joints and leaking tray & enclosure joints, and people most often call us about a shower that leaks however often it’s resealed and worktop sealant that has shrunk and split.
London homes include a lot of flats, conversions and mansion blocks, so a bathroom is often directly above a neighbour’s ceiling. In Old Coulsdon, that is a good reason to put tired sealant and grout right early.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- Old Coulsdon (CR5, CR3, CR8)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Also near Old Coulsdon
Other services in Old Coulsdon
What affects the cost of remedial sealant
Every job gets its own quote. These are the things that affect it:
- The old material and how stubborn it is
- The number and length of the joints
- Mould in or behind the old joints
- Access and height
Instead of a standard rate, 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.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- What’s wrong with the joints now
- Whether it’s a home or a business
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you are ready, call 0345 464 0079 or email us.
How it works
Before we leave, we go over the finished joints with you and tell you how long to leave it. The work 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 a London area like Old Coulsdon, the main things to plan are parking and access: 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.
- We clean and degrease the joint and look for signs of movement or water.
- New sealant goes in once the joint is dry, and is tooled smooth.
- You get the cure time and our view on why the joint failed.
Preparing for the visit
- Clear the area around the work
- Let us know about stairs, lifts or work at height
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Related advice
Remedial sealant in Old Coulsdon: local notes
London has hard water, which leaves limescale on sealant, grout and taps, and it has to be cleaned off before new sealant goes in. 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 Keston Primary School? Then its toilets, changing areas and kitchens need their sealant renewed like any other building’s. As a London address, Old Coulsdon can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. For landlords with property near Coulsdon South station, a joint that keeps failing is best fixed properly while the property is empty.
Old Coulsdon is about 1 mile south-east of Coulsdon, in Greater London. From the centre of Old Coulsdon to the outskirts, we cover remedial sealant for every kind of property. Old Coulsdon is one of 764 towns and villages in Greater London where we work for remedial sealant. There’s also a page for London, about 14 miles away.
Here we cover the CR5, CR3 and CR8 postcode area for remedial sealant. Streets in the area include Ellis Road, Tollers Lane and Court Avenue, all of which we cover. Close by, we work in Coulsdon (1 mile north-west), Chipstead (2 miles west), Purley (2 miles north), Woodcote (2 miles north-west) and Woodmansterne (3 miles west). Further out, we also cover London (14 miles north), City of Westminster (15 miles north), Marylebone (15 miles north), Kensington (14 miles north), Whitechapel (15 miles north) and Brompton (14 miles north).
Near you in Old Coulsdon
Typical jobs here are in homes near Sunnydown School, Dollypers Hill and The Tudor Rose pub. The closest station to Old Coulsdon is Coulsdon South station, about 1.4 miles north-west of the centre. Nearby you will also find East Surrey Museum (2 miles south-east) and St Lawrence's Hospital (1.3 miles south-east). The countryside around Old Coulsdon includes Nore Hill and Mercers Lake.
Why deal with it now?
Ripping out a bathroom is not normally needed. If the bath, tray and tiles are sound, remedial resealing usually puts it right. If they’re not, we’ll tell you. 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. Putting it right early is much less trouble.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why book with us
- Over 20 years’ experience
- We agree the colour with you first
- We’re fully insured
- ARBOMaster approved applicator
Take a look at how sealant jobs are priced and customer reviews.
Surface by surface
Windows & doors
Failed frame mastic is often hard, cracked and in several layers. We remove it all and clean back to sound surfaces before backing and resealing.
Over-sealed & botched joints
A thick bead smeared across tiles often hides mould or gaps. We strip it back so we can see the joint, and then we reseal it neatly.
Old Coulsdon: your questions answered
Could a tired shower seal in my Old Coulsdon flat affect the neighbours below?
It can, yes: water that gets past a split bead or cracked grout often runs under the tray and shows on the ceiling below. Replacing the sealant and grout before that happens is much less trouble than repairing a neighbour’s ceiling.
Is parking a problem for a job in Old Coulsdon?
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 hold any approvals?
Yes. We are an ARBOMaster approved applicator.
How do I get a quote for remedial sealant in Old Coulsdon?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before we start.
Where is Mr Mastic based?
Our base is in Crawley, and we work across South East England, London and Scotland.
How long will it take to strip and reseal the joint?
The number of joints and layers decides it. We’ll tell you before we start.
Do you remove the old sealant?
Yes, always, and completely. New sealant will not bond properly to old, so the joint is cleaned back first.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint before we leave.
When it isn’t the sealant
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- A bath, tray or worktop that moves until it’s properly fixed
- A leaking trap, valve or supply pipe
- Tiles that have come away from the wall
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think before booking.
Where we work in Old Coulsdon
- Failed movement joints
- Expansion joints
- Mouldy bath & shower sealant
- Leaking tray & enclosure joints
- Botched or over-sealed joints
- Shrunken worktop sealant
For landlords and businesses
We also work for property managers and facilities teams in Old Coulsdon and across Greater London. Several sites can go on one quote.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can go on one quote.