Greater London · England
Remedial Sealant in Westerham
Removing failed, mouldy or leaking sealant and putting it right for Westerham, backed by a one-year guarantee. Call for a quick quote.
- Thick, messy sealant smeared over tiles
- Kitchen joints letting water behind the worktop
- Leaks that keep coming back after resealing
Remedial sealant in Westerham
Water on the floor doesn’t always mean failed silicone. Cracked trays, leaking wastes and faulty valves often look like a sealant problem. If that’s what we find, we will tell you rather than reseal something that will not fix it. Typical jobs include sealant peeling off a dusty or damp surface and kitchen joints letting water behind the worktop, across botched or over-sealed joints, leaking tray & enclosure joints and failed movement joints.
In much of London, period terraces have been converted into flats over the years, and bathrooms were often squeezed into small rooms. Small, steamy rooms are where mould gets into sealant and grout fastest, and homes in Westerham are no different.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- Westerham (TN16)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
A visit follows a simple pattern: we check the joints, protect the area around them, carry out the job and clear up. It generally takes a few hours, depending on how many layers have to come out. In a London area like Westerham, 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.
- 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.
- The joint is cleaned, treated for mould and left to dry.
- Where the joint moves, backing and a flexible sealant suited to the movement go in.
- The new joint is tooled neatly and we explain anything else we found.
How to prepare
- Mention any leaks or damp you’ve noticed
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
Get a quote
We quote each job on its own. Just call 0345 464 0079 or send us an email with the details.
Related advice
Also near Westerham
Also in Westerham
Your questions about remedial sealant in Westerham
Can parking be tricky for a visit in Westerham?
Parking in Westerham, 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 take on hotel work around Westerham?
Yes, we work for hotels as well as homes and businesses. A room-by-room programme keeps most rooms in use while the work goes on.
Can failed expansion joints be resealed?
Yes. If a joint has been filled with mortar or rigid filler, we rake it out where possible, and reseal with a flexible product.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Will you leave a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll explain our choice.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
When something else is needed
It helps to know what we can’t do:
- A bath, tray or worktop that moves until it’s properly fixed
- Older mastics that may need an asbestos check before removal
- Cracks in the fitting rather than the joint
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before booking.
Joints and surfaces we work on
- Failed movement joints
- Botched or over-sealed joints
- Expansion joints
- Mouldy bath & shower sealant
- Shrunken worktop sealant
- Leaking tray & enclosure joints
Westerham homes and their sealant
London’s water is hard, which leaves limescale on sealant, grout and taps, and it has to be cleaned off before new sealant goes in. Westerham has hotels and guest accommodation nearby. As well as homes, we work in hotel bathrooms, where resealing and regrouting can be done room by room.
Letting a property close to Hurst Green station? Then a joint that keeps failing is best fixed properly while the property is empty. Westerham is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Westerham is about 5 miles west of Sevenoaks, in Greater London. Every kind of property in Westerham can book us for remedial sealant, old or new, large or small. Every job comes with our 12-month guarantee. Westerham is one of 764 places in Greater London we cover. You can also see our page for Crawley, roughly 16 miles from Westerham.
We work across the TN16 postcode area for remedial sealant. That includes homes and businesses on Market Square, London Road and High Street and the roads around them. Westerham is on the A25 and B2024, which makes it straightforward to reach with everything needed for remedial sealant. Neighbouring places we cover for remedial sealant include Force Green (1 mile north), Moorhouse Bank (1 mile south-west), Goodley Stock (2 miles south), The Chart (2 miles south-west) and South Street (2 miles north-west). Within a short drive, we also cover Orpington (8 miles north), New Cross (15 miles north), Thornton Heath (12 miles north-west), Croydon (10 miles north-west), East Dulwich (15 miles north-west) and Plumstead (15 miles north).
Local landmarks in Westerham
Typical jobs here are in homes near The Olde House At Home Public House. For rail, the closest station is Hurst Green station, about 3.4 miles south-west of the centre. Well-known places in the area include Tandridge Priory (2.2 miles south-west). For a walk, there’s Betsom's Hill and Dryhill Nature Reserve.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Keep an eye on the ceiling below the bathroom
- Have loose fittings fixed before resealing
- Do not wait for a small gap to become a leak
- Air the bathroom so the sealant can dry
Give the new sealant its full cure time: normally around 24 hours, or as long as we advise.
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.
When to call us in Westerham
Even good sealant ages. Over the years it shrinks, hardens and gets colonised by mould, faster where ventilation is poor. At that point it has to come out.
These are the problems we are asked about most:
- Sealant applied over old sealant that has lifted
- Smears and lumps from a botched reseal
- Movement joints that have split or pulled away
- Worktop sealant that has shrunk and split
Homes close to Church of St Mary the Virgin include some older properties, and timber floors under older bathrooms flex, so joints need a sealant that moves with them.
Before you book anyone
- Which colour the sealant will be
- How much experience the applicator has
- What preparation is included
- Whether they seal over old material or remove it
Leave it or put it right?
DIY removal often leaves scratches and a film of residue, and the residue left behind stops the next bead bonding. Careful removal is most of a remedial job. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Westerham, the repair is bigger than the sealant job would have been.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or email us.
Why choose Mr Mastic in Westerham
- Domestic, commercial and hotel work
- Colour agreed with you before work begins
- Rated 4.9 stars on Google
- We leave the area clean and tidy
Read what affects the cost or our reviews.
Can I do it myself?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
What affects the quote in Westerham
There’s no set price list. The quote depends on:
- The product the joint needs
- Any mould that needs treating
- How many rooms, windows or areas are involved
- How much there is to do
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- The address or postcode of the job
- How many joints, rooms or windows are involved
- Whether it has been sealed before
- If it’s domestic, commercial or a hotel
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved.