Greater London · England
Remedial sealant & repairs in Bromley, Greater London
Remedial sealant in Bromley from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Sealant that came away because the surface wasn’t prepared
- Caulk or the wrong sealant used in a wet area
- Gaps opening along the back of the worktop
Remedial sealant in Bromley
Not every leak is a sealant leak. Cracked trays, leaking wastes and faulty valves often look like a sealant problem. When the fault is elsewhere, we say so instead of resealing for the sake of it. We work on botched or over-sealed joints, leaking tray & enclosure joints and failed movement joints, and the jobs we see most are sealant peeling off a dusty or damp surface and decorators’ caulk around a bath or shower.
Across London, a large share of homes are flats, conversions or mansion blocks, and many bathrooms sit right above someone else’s ceiling. That makes worn sealant and cracked grout in Bromley more than a cosmetic job.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Bromley (BR2, BR1, BR6, BR5)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Bromley: your questions answered
Is parking a problem for a job in Bromley?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
I live in a flat in Bromley. Can a failed seal leak into the flat below?
Yes. In a flat, water from a failed bath or shower seal has only one way to go, and that’s down. Cutting out the old sealant and laying a new bead early stops it getting that far.
Can old silicone be taken off without scratching the tiles?
Yes. We cut and lift the old sealant with tools suited to the surface, then clean off the residue. Any existing damage is pointed out before we start.
Will you leave a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Are you fully insured?
Yes, we are fully insured for every job we do.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Bromley.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that normally means someone at home.
How do I get a quote for remedial sealant in Bromley?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Why deal with it now?
Ripping out a bathroom isn’t normally needed. If the bath, tray and tiles are sound, remedial resealing normally puts it right. Where something else has failed, you will hear it from us. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and send you a clear quote before any work starts.
Why book with us
- A sealant colour to suit the surroundings
- More than 20 years in sealant work
- Full insurance on every job
- White, clear, grey or another colour, product permitting
Take a look at our cost guide and customer reviews.
How the job changes by surface
Windows & doors
Wrong-coloured or messy mastic can be replaced for appearance too, matched to the frame colour.
Worktops & kitchens
Shrunken worktop sealant leaves a gap that lets water into the back edge. We strip it, degrease the joint and reseal in a colour to suit.
Bromley 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’s water is hard, so limescale builds up on sealant, grout and fittings.
For landlords with property near Bromley South station, a joint that keeps failing is best fixed properly while the property is empty. For an older house near a landmark such as Church of St Peter and St Paul, bathrooms in older houses have often been refitted more than once, with sealant laid over sealant. As a London address, Bromley can be tricky for parking: let us know about parking bays, permits or a driveway.
Bromley is about 8 miles south-east of London, in Greater London. Anywhere in BR2, we can carry out remedial sealant at your property. Across Greater London, we cover 764 places, and Bromley is one of them. For nearby work, see our London page, about 8 miles away.
Work in BR2, BR1, BR6 and BR5 is quoted and booked the same way as anywhere else. Streets in the area include High Street, Church Road and St Paul's Square. With the A222 and A223 close by, Bromley is easy for our applicators to reach. Close by, we work in Sundridge (1 mile north-east), Plaistow (1 mile north), Bickley (1 mile east), Widmore (1 mile east) and Downham (2 miles north). Larger places within reach include London (8 miles north-west), City of Westminster (11 miles north-west), Marylebone (11 miles north-west), Kensington (12 miles north-west), St Pancras (10 miles north-west) and Shoreditch (9 miles north-west).
What’s near Bromley
Typical jobs here are in homes near Bullers Wood School for Boys, The Richmal Crompton pub and Church House Gardens and the streets around them. There’s a railway station in Bromley itself: Bromley South station. Nearby you will also find The Mall (within half a mile east) and Bromley Hospital (under half a mile south-east). For a walk, there’s Downham Woodland Walk and Summer Hill.
What happens on the day
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the work takes a few hours for most joints, depending on how much old sealant has to come out in most cases. In Bromley, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- Surrounding tiles, trays and frames are protected first.
- The botched or failed sealant is cut away completely.
- The joint is degreased and checked for movement and leaks.
- Once dry, a suitable sealant is applied and tooled.
- We give you the cure time and explain what caused the failure.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Clear items away from the joints we are working on
- For business premises, tell us about site rules or sign-in
How to get a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we will come back to you with a quote.
Related advice
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Also in Bromley
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Never fill a movement joint with mortar or grout
- Get the cause of a repeat leak found before resealing
- Run the fan after every shower
- Look for stains below bathrooms now and then
Ventilation keeps mould away from the new bead: run the fan during and after showers, or open a window.
Do not keep resealing the same joint. Have someone find out why, otherwise the next attempt will fail too.
What we can’t put right
It helps to know what we cannot do:
- Leaks from a shower valve, waste or pipework (a plumber’s job)
- A tray or worktop that needs refixing first
- Failed tanking or loose tiles behind the sealant
If you are not sure, just phone 0345 464 0079 or email us and we will give you a straight answer.
What we seal
- Expansion joints
- Leaking tray & enclosure joints
- Botched or over-sealed joints
- Failed movement joints
- Shrunken worktop sealant
- Mouldy bath & shower sealant
What affects the cost of remedial sealant
We don’t publish a price list, because jobs vary so much. The quote depends on:
- How much old sealant there is and how hard it is to remove
- The type of sealant required
- How many areas need sealing
- How much there is to do
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Helping us quote
Photos by email are helpful but not essential. Please mention:
- What the problem is, such as mould, gaps, leaks or cracking
- Roughly how big the job is
- Whether it has been sealed before
- How we’d reach the joints
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. Whenever you’re ready, call 0345 464 0079 or email us.