Greater London · England
Remedial Sealant in Botany Bay
Removing failed, mouldy or leaking sealant and putting it right for Botany Bay, backed by a one-year guarantee. Call for a quick quote.
- Black mould underneath the bead
- Wide, uneven beads that look worse than the old ones
- Kitchen joints letting water behind the worktop
DIY sealant or a professional job?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
How we handle remedial sealant in Botany Bay
Removing failed sealant is the hardest part of the job. Every layer is cut out, the residue cleaned off and the joint degreased, without scratching tiles, trays or frames. Only then can new sealant bond. Common call-outs are for sealant applied over old sealant that has lifted and beads that never stuck properly, across failed movement joints, mouldy bath & shower sealant and shrunken worktop sealant.
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 stand behind the work with a one-year guarantee, so you are covered after we have gone.
- Where
- Botany Bay (EN2)
- Region
- Greater London
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Towns and villages near Botany Bay
What else we do in Botany Bay
Surface by surface
Movement & expansion joints
Movement joints in floors, walls and façades need a flexible sealant set to the right depth. We remove the failed sealant, fit backing and reseal with a low-modulus product.
Mouldy bath & shower sealant
Mould can sit behind the silicone, not just in it. We treat the exposed joint once the bead is out.
The process
The work is kept neat and contained to the joints we are treating, so you can carry on as normal. The job normally takes a few hours for a typical bath or shower, longer where several layers have been applied, and we tell you how long to leave it before we go. In a London area like Botany Bay, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- 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.
Getting ready for the visit
- Tell us about any water getting in
- Plan for the work area to be out of bounds to pets and children
- Let us know about stairs, lifts or work at height
How to get a quote
There’s no standard price list. Instead, we give you a clear price for your job. To get started, phone 0345 464 0079 or send us an email.
Related advice
Aftercare tips
Simple care keeps the joints in good condition. We recommend:
- Have loose fittings fixed before resealing
- Never seal over old silicone
- Ask why a joint failed before redoing it
- Use a soft cloth, not a scourer, on silicone
Go easy on the new sealant: a mild cleaner and a soft cloth, with no blades or scourers.
Warning signs: sealant lifting at the ends, a second bead visible on top of the first, black mould under the silicone, or stains below a bathroom. Each one is worth getting looked at.
Botany Bay 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.
Botany Bay is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Rented homes near Crews Hill station change hands often, and botched sealant from a previous quick fix is easier to strip out between tenants.
Botany Bay is about 3 miles south-east of Potters Bar, in Greater London. Anywhere in EN2, we can carry out remedial sealant at your property. Across Greater London, we cover 764 places, Botany Bay among them. London is on our list too, about 12 miles from Botany Bay.
All of EN2 is covered for remedial sealant, from the main roads to the quietest streets. Local streets include The Ridgeway and East Lodge Lane, all of which we cover. Botany Bay sits on or near the A1005, so getting to you is simple. Neighbouring places we cover for remedial sealant include Northaw Valley (1 mile north-west), Cockfosters (2 miles south-west), Grange Park (2 miles south-east), Hadley Wood (2 miles south-west) and World's End (2 miles south). Within a short drive, we also cover London (12 miles south), City of Westminster (11 miles south), Marylebone (11 miles south), Kensington (13 miles south), St Pancras (10 miles south) and Shoreditch (11 miles south).
Near you in Botany Bay
In Botany Bay, that means homes and buildings near The Robin Hood pub, Trent Park and Highlands School and the streets around them. For rail, the closest station is Crews Hill station, about 1 mile north-east of the centre. Well-known places in the area include Museum of Enfield (2.7 miles south-east) and Chase Farm Hospital (1.2 miles south-east). For a walk, there’s Fir and Pond Woods and Bowyer's Water.
Botany Bay: your questions answered
I live in a flat in Botany Bay. 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 you help a landlord with a rental near Crews Hill station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Where are you based?
We work from Crawley. We cover Botany Bay and the rest of Greater London, along with the rest of our area.
What information do you need?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
Can you remove old sealant without damaging the bath?
Yes. We avoid heavy scraping and use the right cleaner for each surface.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Do the sealants smell?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
For landlords and businesses
We work for landlords and agents as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
When to call us in Botany Bay
A lot of failed joints have been sealed over rather than replaced. New silicone cannot stick to the old bead, so the top layer lifts and water and mould collect between the two.
Keep an eye out for any of the following:
- Over-sealed joints coming away
- Sealant peeling off a dusty or damp surface
- Leaks that keep coming back after resealing
- Black mould underneath the bead
If you look after a building such as St. John's Senior School, 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.
What to look for in a quote
- How much experience the applicator has
- How the colour is chosen
- When the joint can take water or movement
- Are they insured?
Leave it or put it right?
Stripping out botched sealant adds time to a reseal, but rarely a lot: it takes a few hours for a typical bath or shower, longer where several layers have been applied. It’s far less disruption than resealing the same joint again and again. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler.
Combining jobs into one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
Why us?
- White, clear, grey or another colour, product permitting
- More than 20 years in sealant work
- ARBOMaster approved applicator
- Tidy, careful work