Greater London · England
Remedial sealant & repairs in Coombe, Greater London
Removing failed, mouldy or leaking sealant and putting it right in Coombe, with a one-year guarantee on every job. Ask us for a quote.
- Kitchen joints letting water behind the worktop
- Over-sealed joints coming away
- Leaks that keep coming back after resealing
About our remedial sealant in Coombe
A joint that keeps failing usually has a reason. Movement, the wrong product or a leak from somewhere else will defeat even a perfect bead. Finding that cause comes before any new sealant. If you’re dealing with repeat leaks from the same joint and dark patches showing through the sealant, we can put it right.
London homes include a lot of flats, conversions and mansion blocks, so a bathroom is often directly above a neighbour’s ceiling. In Coombe, that’s a good reason to put tired sealant and grout right early.
Every job is covered by a one-year guarantee, wherever you are in Greater London.
- Place
- Coombe (CR0, CR2, CR9)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Why act early in Coombe
Leaks that are left keep doing damage out of sight: soaked floorboards, ceiling stains below and blown plaster. Dealing with the joint now is a small job by comparison. In a flat in Coombe, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Why Coombe customers choose us
- More than 20 years in sealant work
- Colour agreed with you before work begins
- Sanitary silicone with an anti-fungal additive in wet areas
- 180+ five-star Google reviews
Read our cost guide and customer reviews.
Towns and villages near Coombe
What else we do in Coombe
What we do, step by step
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The job generally takes a few hours for a typical bath or shower, longer where several layers have been applied. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We protect the surfaces around the joint.
- Every layer of failed sealant is stripped out.
- The joint is degreased and checked for movement and leaks.
- Once dry, a suitable sealant is applied and tooled.
- You get the cure time and our view on why the joint failed.
Preparing for the visit
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
- Tell us about any previous sealing or DIY attempts
How to get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
Related advice
Coombe homes and their sealant
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. London has hard water, so limescale builds up on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in.
For landlords with property near South Croydon station, a joint that keeps failing is best fixed properly while the property is empty. Coombe is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Coombe is about 1 mile east of Croydon, in Greater London. Jobs in Coombe get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Across Greater London, we cover 764 places, and Coombe is one of them. London is on our list too, around 9 miles away.
We work across the CR0, CR2 and CR9 postcode area for remedial sealant and the streets around it. Remedial sealant is available to properties on Oaks Road, Coombe Road and Coombe Lane. Neighbouring places we cover for remedial sealant include Croydon (1 mile west), Addiscombe (1 mile north), South Croydon (1 mile south-west), Shirley Oaks (1 mile north-east) and Shirley (1 mile north-east). We also work in nearby towns such as London (9 miles north), City of Westminster (11 miles north), Marylebone (11 miles north), Kensington (11 miles north-west), St Pancras (11 miles north) and Shoreditch (11 miles north).
Around Coombe
Around Coombe, our work takes us to homes and buildings near Coombe Lodge pub, Royal Russell School and St Peter's Primary School and the streets around them. The nearest railway station is South Croydon station, about 1 mile west of the centre. Well-known places in the area include St George's Walk (1.4 miles north-west) and Croydon Airport Visitor Centre (2.1 miles west). Open spaces near Coombe include Bramley Bank and Duppas Hill.
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
How we quote for remedial sealant
Every job gets its own quote. These are the things that affect it:
- Whether the work is at height
- The size of the job
- Which sealant suits the joint
- Any mould that needs treating
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
What we need to know
What to tell us when you ask for a quote:
- A few pictures by email, if you can
- Where the job is, and your postcode
- The problem you’ve noticed
- The type of property
If you are in Coombe and need remedial sealant, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and you will get a clear quote before we start.
Common problems we fix in Coombe
Silicone only bonds to surfaces that are clean and dry. Residue, moisture or dust left in the joint weaken the bond, and the joint starts to come away early.
Signs it’s time to call us include:
- Mould trapped under a layer of silicone
- Thick, messy sealant smeared over tiles
- Decorators’ caulk around a bath or shower
- Floor or wall movement joints that have failed
For site and facilities teams at buildings such as Coombe Wood School, its toilets, changing areas and kitchens need their sealant renewed like any other building’s.
Before you book anyone
- What insurance they hold
- Whether all the old sealant comes out first
- Who turns up on the day
- How the surfaces are prepared before sealing
Coombe: your questions answered
Can parking be tricky for a visit in Coombe?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
I live in a flat in Coombe. 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.
How long does remedial resealing take?
It takes a few hours, depending on how many layers have to come out. You will know the timing when we quote.
Do you have insurance?
Yes, we are fully insured for every job we do.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
What does remedial sealant cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before any work starts.
Do you work for landlords and businesses?
Yes. We work for householders, landlords, letting agents, businesses and hotels.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
Different surfaces, different methods
Worktops & kitchens
If a worktop moves when you lean on it, the sealant will keep splitting. It needs fixing down first, which we’ll point out.
Over-sealed & botched joints
A botched joint can hide two or three layers of sealant, and silicone residue is cleaned off the tiles too. New sealant needs a fully clean surface.
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Air the bathroom so the sealant can dry
- Clean sealant with mild products only
- Keep an eye on the ceiling below the bathroom
- Find out why the sealant failed first
Do not let anyone seal over it later. New silicone does not bond to old, so the old bead should always come out first.
Movement joints that have split let water into the structure, and the longer it’s left, the more the joint edges break down. Resealing while the edges are sound is simpler.