Greater London · England
Croydon Remedial Sealant
Remedial sealant for Croydon, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Caulk or the wrong sealant used in a wet area
- Worktop sealant that has shrunk and split
- Smears and lumps from a botched reseal
Remedial sealant in Croydon, done properly
Movement and expansion joints fail when the sealant cannot stretch. We cut out the failed sealant and set the depth with backing, before resealing with a flexible product suited to the movement. If you are dealing with dark patches showing through the sealant and wide, uneven beads that look worse than the old ones, we can put it right, whatever the surface.
London homes include a lot of flats, conversions and mansion blocks, so a bathroom is often directly above a neighbour’s ceiling. That makes worn sealant and cracked grout in Croydon more than a cosmetic job.
The work is covered for a year after we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Place
- Croydon (CR0, CR2, CR9, CR8)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What happens if it’s left?
Spraying mould remover on a sealed-over joint doesn’t reach what’s underneath. The layers have to come out. In a flat in Croydon, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What you get with us
- White, clear, grey or coloured to suit, where the product allows
- Any old sealant cut out fully, not covered over
- Every job guaranteed for a year
- More than 20 years in sealant work
See our cost guide and customer reviews.
Croydon questions
Do you work in hotels near Croydon?
Yes, hospitality work, including hotels, is part of what we do. Work can be planned room by room, and out-of-hours working can be arranged.
Is parking an issue for remedial sealant in Croydon?
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.
Will the old sealant be removed?
Yes, every time. New sealant won’t bond properly to old, so the joint is cleaned back first.
Where are you based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Someone sealed over the old bead. Can you fix it?
Yes. We cut out all the layers and clean off the film, then the joint is resealed once.
What does remedial sealant cost?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You will get a clear quote before work begins.
Can you fix a reseal that hasn’t worked?
Yes. All the sealant comes out, we find out why it failed, and the joint is resealed properly.
How it works
Every visit runs the same way: we check the joints, protect the area around them, do the work and tidy away. Most jobs take a few hours, depending on how many layers have to come out. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Croydon. It helps if you can point us to a visitor permit or a bay close to the door.
- We look at how the sealant has failed and check for movement or a leak path.
- Every layer of old sealant is cut and cleaned out.
- The joint is cleaned, treated for mould and left to dry.
- Moving joints get backing and a flexible sealant to suit.
- The new joint is tooled neatly and we explain anything else we found.
Preparing for the visit
- Tell us if parking is tricky
- Mention if the joints have been sealed before
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before we start.
Related advice
What affects the quote in Croydon
Jobs vary more than people expect. What affects the quote:
- The old material and how stubborn it is
- The number of rooms or windows
- Working hours on commercial sites
- How much there is to do
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Call for a quick quote and we’ll go through it with you.
What to tell us for a quote
When you contact us, these details help:
- Any previous sealing or DIY work
- What’s wrong with the joints now
- Whether it’s a home or a business
- Where the property is
We quote each job on its own, so start by telling us what you need. Simply ring 0345 464 0079 or send us an email and describe the job.
Croydon 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.
If you live in an older home near St Andrew's, timber floors under older bathrooms flex, so joints need a sealant that moves with them. If you look after a building such as Heathfield Academy, 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. As a London address, Croydon can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Croydon is about 9 miles south of London, in Greater London. Every kind of property in Croydon can book us for remedial sealant. The work is guaranteed for a year. We cover 764 towns and villages across Greater London, large and small. We also work in London, around 9 miles away.
We cover every part of CR0, CR2, CR9 and CR8 for remedial sealant and the streets around it. You’ll find streets such as High Street, Church Road and Ruskin Square. You’ll find Croydon on the A235 and B243, which makes it straightforward to reach with everything needed for remedial sealant. Close by, we work in South Croydon (1 mile south), Coombe (1 mile east), Addiscombe (2 miles north-east), Ashburton (2 miles north-east) and Woodside (2 miles north-east). We also work in nearby towns such as London (9 miles north), City of Westminster (10 miles north), Marylebone (11 miles north), Kensington (10 miles north-west), St Pancras (11 miles north) and Shoreditch (11 miles north).
Local landmarks in Croydon
Locally, jobs take us to homes and businesses close to Cambridge Tutors College, Rutherford School and Keg & Grill pub, among other places. Croydon has its own railway station: South Croydon station. Other landmarks nearby include Croydon Airport Visitor Centre (1.2 miles south-west) and Croydon University Hospital (1.7 miles north). For a walk, there’s Roundshaw Downs and Duppas Hill.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Get the cause of a repeat leak found before resealing
- Look for stains below bathrooms now and then
- Clean sealant with mild products only
- Never fill a movement joint with mortar or grout
Don’t let anyone seal over it later. New silicone doesn’t bond to old.
Mould trapped under over-sealed joints spreads unseen. When it finally shows, the whole bead needs to come out.
Surface by surface
Worktops & kitchens
A loose worktop splits its sealant. It needs fixing down first, and we’ll tell you if we find it.
Movement & expansion joints
Movement joints in floors, walls and façades need a flexible sealant set to the right depth. Failed sealant is cut out, backing rod or tape is fitted and the joint resealed with a low-modulus product.
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can be quoted together.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.