Greater London · England
Remedial sealant & repairs in St Johns, Greater London
Remedial sealant for St Johns, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Smears and lumps from a botched reseal
- Sealant peeling off a dusty or damp surface
- Leaks that keep coming back after resealing
The process
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the job takes a few hours for a typical bath or shower, longer where several layers have been applied in most cases. For a job in St Johns, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We look at how the sealant has failed and check for movement or a leak path.
- All the old sealant comes out, including any layers underneath.
- Next, any mould is treated and the joint dried.
- We use the right backing and sealant for any joint that moves.
- The new joint is tooled neatly and we explain anything else we found.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Let us know about stairs, lifts or work at height
- Clear items away from the joints we’re working on
Getting 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 add pictures by email if you can.
Related advice
How we handle remedial sealant in St Johns
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. We work on shrunken worktop sealant, failed movement joints and leaking tray & enclosure joints, and common reasons people get in touch are wide, uneven beads that look worse than the old ones and caulk or the wrong sealant used in a wet area.
London’s water is hard, so limescale builds up along sealant lines, in grout and on fittings. For a bathroom or kitchen in St Johns, getting the joints right keeps water where it belongs and the room looking clean.
Each job carries a 12-month guarantee, whatever its size.
- Where
- St Johns (SE13, SE10, SE8)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What else we do in St Johns
What affects the quote in St Johns
Some jobs are bigger than they look, and some smaller. The main factors:
- How many rooms, windows or areas are involved
- Whether the work is at height
- The old material and how stubborn it is
- The size of the job
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, phone 0345 464 0079 or email us for an honest opinion and a quote.
What to tell us for a quote
To make quoting easier, please include:
- Roughly how big the job is
- What’s wrong with the joints now
- Where the job is, and your postcode
- Photos by email, if that’s easy
For remedial sealant in St Johns, call 0345 464 0079 or email us. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
St Johns homes and their sealant
There are hotels and other places to stay in and around St Johns. Hotel bathrooms are part of our work as well as homes, and can be done room by room. London has a lot of flats and conversions, and a failed shower or bath seal in one can show up on the ceiling below, which is why it’s worth fixing early.
St Johns is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you let a flat or house near St Johns station, botched sealant from a previous quick fix is easier to strip out between tenants.
St Johns is about 4 miles south-east of London, in Greater London. Anywhere in SE13, we can carry out remedial sealant at your property. Our area takes in 764 places across Greater London, from the larger towns to small villages.
Our applicators cover all of the SE13, SE10 and SE8 postcode area for remedial sealant. We cover properties on Avon Road, Mill Lane and Clare Road and the roads around them. Main roads around St Johns include the A2210 and A2211, so getting to you is simple. Nearby, we also carry out remedial sealant in New Cross (1 mile west), Deptford (1 mile north), Lewisham (1 mile south-east), Telegraph Hill (1 mile west) and Ladywell (1 mile south). Larger places within reach include London (4 miles north-west), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (8 miles west), St Pancras (6 miles north-west) and Shoreditch (5 miles north-west).
Around St Johns
In St Johns, that means homes and buildings near Wickham Arms, Brookmill Park and Addey and Stanhope School and the streets around them. Also close by are St. Paul's (0.7 miles north) and Laban Centre (0.8 miles north). There’s a railway station in St Johns itself: St Johns station. Nearby you’ll also find Fan Museum (0.9 miles north-east) and Lewisham Shopping Centre (0.7 miles south-east). For a walk, there’s Brookmill Road Local Nature Reserve and Tower Hill.
Signs you need remedial sealant in St Johns
Some joints fail because water is reaching them from behind. A leaking valve, a failed waste or cracked grout feeds water behind the bead, and the sealant lifts or goes mouldy from underneath.
People generally contact us when they notice one of these:
- Thick, messy sealant smeared over tiles
- Black mould underneath the bead
- Leaks that keep coming back after resealing
- Caulk or the wrong sealant used in a wet area
Managing a site like Ashmead Primary School? Then we reseal washrooms and kitchens in schools and businesses as well as homes.
Comparing quotes
- Which sealant they’ll use, and why
- Is VAT in the price?
- What happens if the job turns out different
- Is the old sealant removed completely?
DIY sealant or a professional job?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
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, and the work is guaranteed for a year.
Common questions in St Johns
Is parking an issue for remedial sealant in St Johns?
Parking in St Johns, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Do you work in hotels near St Johns?
Yes, hotels and guest houses are among the places we work. Rooms can be done a few at a time, so the building stays open.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done.
Does someone need to be in?
That depends on where the joints are. For work indoors, someone needs to let us in.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Can you remove sealant that is been put over old sealant?
Yes. Stripping layered sealant takes longer than a normal reseal, but it’s what makes the new bead last.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
When is the sealant fully cured?
Cure times vary by product and the temperature. Before we leave, we will tell you the cure time.
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Leaks from a shower valve, waste or pipework (a plumber’s job)
- A tray or worktop that needs refixing first
- Cracks in the fitting rather than the joint
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think.
Joints and surfaces we work on
- Expansion joints
- Failed movement joints
- Leaking tray & enclosure joints
- Botched or over-sealed joints
- Shrunken worktop sealant
- Mouldy bath & shower sealant
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Run the fan after every shower
- Use a soft cloth, not a scourer, on silicone
- Never seal over old silicone
- Check ceilings under showers for marks
Do not let anyone seal over it later. Over-sealing is how many remedial jobs start, so the old bead should always come out first.
Don’t keep resealing the same joint. Get the cause found first, otherwise the next attempt will fail too.
How the job changes by surface
Windows & doors
Some leaks around windows come from the wall or the window itself. If the frame joint isn’t the cause, we will say so.
Movement & expansion joints
Some movement joints have been filled with mortar or grout. Where it can be raked out, we replace it with flexible sealant.