Greater London · England
St Paul's Cray Remedial Sealant
Removing failed, mouldy or leaking sealant and putting it right for homeowners, landlords and businesses in St Paul's Cray. Fully insured, ARBOMaster approved and guaranteed for a year.
- Wide, uneven beads that look worse than the old ones
- Decorators’ caulk around a bath or shower
- Over-sealed joints coming away
Leave it or put it right?
Mould under a bead cannot be reached by cleaning. Removal is the only way to get at it, so the joint can be treated and resealed. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start.
Why St Paul's Cray customers choose us
- An ARBOMaster approved applicator
- Colour agreed with you before work begins
- Sanitary silicone with an anti-fungal additive in wet areas
- White, clear, grey or another colour, product permitting
Take a look at what affects the cost and customer reviews.
Remedial sealant in St Paul's Cray, done properly
A movement joint stops working when its sealant splits or sets hard. We cut out the failed sealant and set the depth with backing, before resealing with a flexible product suited to the movement. Common call-outs are for black mould underneath the bead and sealant applied over old sealant that has lifted, across failed movement joints, shrunken worktop sealant and expansion joints.
Much of London’s older housing is Victorian and Edwardian terraces, many of them now split into flats, and bathrooms were often squeezed into small rooms. A compact bathroom that steams up every day is hard on silicone and grout, and homes in St Paul's Cray are no different.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Location
- St Paul's Cray (BR5, BR7)
- Wider area
- Greater London
- Cover
- One year on every job
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
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.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
What we do, step by step
Once we’re on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours for most joints, depending on how much old sealant has to come out. In a London area like St Paul's Cray, 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.
- First we find out how and where the joint has failed.
- We strip the joint completely, removing any layers below.
- Next, any mould is treated and the joint dried.
- Moving joints get backing and a flexible sealant to suit.
- The new joint is tooled neatly and we explain anything else we found.
Getting ready for the visit
- Tell us about any water getting in
- Clear items away from the joints we’re working on
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
Getting a quote is simple: let us know the job and the location. A few photos by email make the job easier to understand, and we will take it from there.
Related advice
Also near St Paul's Cray
Other services in St Paul's Cray
When to call us in St Paul's Cray
A lot of failed joints have been sealed over rather than replaced. Silicone doesn’t bond to silicone, so the new layer peels, and damp and mould settle between them.
Look out for these signs:
- Worktop sealant that has shrunk and split
- Movement joints that have split or pulled away
- Caulk or the wrong sealant used in a wet area
- Dark patches showing through the sealant
If you let a flat or house near St Mary Cray station, failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak.
Questions to ask before booking
- What the quote includes, VAT included or not
- Whether all the old sealant comes out first
- The length of the guarantee
- How the colour is chosen
Landlord and commercial work in St Paul's Cray
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together, and we’re fully insured for the work.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will give you a quote.
Your questions about remedial sealant in St Paul's Cray
Could a tired shower seal in my St Paul's Cray flat affect the neighbours 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. It’s far simpler to replace tired sealant early than to deal with a neighbour’s ceiling.
I let a flat near St Mary Cray station. Can you help?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Where are you based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Someone resealed my shower and it’s leaking again. Can you help?
Yes. All the sealant comes out, we find out why it failed, and the joint is resealed properly.
Is it messy?
Very little: the area around the joints is protected first, and we tidy up before we go.
Do you offer different sealant colours?
Yes. Sealants come in white, clear, grey and other colours for many products, and we agree the colour with you before any work starts.
Can old silicone be taken off without scratching the tiles?
Yes. Residue is removed with a product suited to the surface rather than scraped hard, so the new sealant bonds cleanly.
How long should I leave it?
It depends on the product and the conditions. We tell you how long to leave it before we go.
St Paul's Cray homes and their sealant
London has hard water, which leaves limescale on sealant, grout and taps. 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.
For site and facilities teams at buildings such as Leesons Primary School, its toilets, changing areas and kitchens need their sealant renewed like any other building’s. In the older streets around St Barnabas, bathrooms in older houses have often been refitted more than once, with sealant laid over sealant.
St Paul's Cray is about 1 mile north of Orpington, in Greater London. Wherever you are in the BR5 postcode area, we can carry out remedial sealant at your property. Our area takes in 764 places across Greater London. There’s also a page for London, roughly 11 miles from St Paul's Cray.
Work in BR5 and BR7 works the same way as everywhere else we cover. If you need remedial sealant at a property on Main Road, Murray Road and Rushet Road or a nearby road, we can help. We also cover the places around St Paul's Cray: St Mary Cray (1 mile south), Poverest (1 mile south), Derry Downs (1 mile south), Orpington (1 mile south) and Kevington (2 miles south-east). Within a short drive, we also cover London (11 miles north-west), City of Westminster (14 miles north-west), Marylebone (14 miles north-west), Kensington (15 miles north-west), St Pancras (13 miles north-west) and Shoreditch (12 miles north-west).
Local landmarks in St Paul's Cray
Typical jobs here are in homes near Kemnal Technology College, The Blue Anchor Public House and Walsingham School, among other places. St Paul's Cray has its own railway station: St Mary Cray station. Well-known places in the area include Lullingstone Castle (4.8 miles south-east) and London Borough of Bromley Museum (1.5 miles south). Green spaces nearby include The Warren and Summer Hill.
What sealant work cannot fix
Before you book, it’s worth knowing the limits too:
- Plumbing leaks behind walls or under trays
- Failed tanking or loose tiles behind the sealant
- A bath, tray or worktop that moves until it’s properly fixed
If in doubt, call 0345 464 0079 or email us and we will say what we think.
Surfaces we seal
- Leaking tray & enclosure joints
- Failed movement joints
- Mouldy bath & shower sealant
- Botched or over-sealed joints
- Expansion joints
- Shrunken worktop sealant
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Ask why a joint failed before redoing it
- Do not point over movement joints
- Always have old sealant cut out, not covered
- Keep an eye on the ceiling below the bathroom
Give the new sealant its full cure time: normally around 24 hours, or as long as we advise.
If a joint has failed more than once, stop resealing it. Get the cause found first, or the next bead will go the same way.