Greater London · England
Remedial sealant & repairs in Holland Park, Greater London
Remedial sealant across Holland Park and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Over-sealed joints coming away
- Mould trapped under a layer of silicone
- Kitchen joints letting water behind the worktop
Remedial sealant in Holland Park
If a joint has been resealed and is leaking again, it’s worth a proper look. Send photos when you phone 0345 464 0079 or email us, along with when it was last resealed. We work on leaking tray & enclosure joints, shrunken worktop sealant and expansion joints, and people most often call us about thick, messy sealant smeared over tiles and over-sealed joints coming away.
London’s water is hard, so limescale builds up along sealant lines, in grout and on fittings. In Holland Park, remedial sealant is as much about a room looking cared for as about keeping water out.
A 12-month guarantee comes as standard, so you are covered after we have gone.
- Location
- Holland Park (W8, W11, W14)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Common problems we fix in Holland Park
Using the wrong product is a common cause: caulk where it gets wet, rigid sealant where things move, or an acetoxy silicone on a surface it can mark. Each fails in its own way.
The most common problems we see are:
- Sealant applied over old sealant that has lifted
- Gaps opening along the back of the worktop
- Products that weren’t meant for the joint
- Black mould underneath the bead
If you let a flat or house near Kensington Olympia station, a joint that keeps failing is best fixed properly while the property is empty.
Questions to ask before you book
- Are they insured?
- Whether all the old sealant comes out first
- How much experience the applicator has
- What the cure time is
What we can’t put right
We will always be straight with you, so here’s what sealant can’t fix:
- Tiles that have come away from the wall
- Sealant in an older building that needs testing for asbestos first
- Leaks from a shower valve, waste or pipework (a plumber’s job)
Not sure which it is? You can phone 0345 464 0079 or email us and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Botched or over-sealed joints
- Mouldy bath & shower sealant
- Leaking tray & enclosure joints
- Failed movement joints
- Shrunken worktop sealant
- Expansion joints
How the visit works
Before we leave, we go over the finished joints with you. The work normally takes a few hours for a typical bath or shower, longer where several layers have been applied, depending on the amount of work. In Holland Park, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- First we find out how and where the joint has failed.
- All the old sealant comes out, including any layers underneath.
- The joint is cleaned, treated for mould and left to dry.
- Moving joints get backing and a flexible sealant to suit.
- We tool the joint and tell you about anything else that needs attention.
How to prepare
- Mention any parking rules near the property
- On commercial sites, let us know about site rules
- Clear items away from the joints we’re working on
Getting a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Advice
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Always have old sealant cut out, not covered
- Report a tray that rocks or a worktop that lifts
- Ask why a joint failed before redoing it
- Keep an eye on the ceiling below the bathroom
Leave the new joint to cure fully before it gets wet or moves: usually around 24 hours, or as long as we advise.
A split movement joint lets rain into walls and floors, and the longer it’s left, the more the joint edges break down. Resealing while the edges are sound is simpler.
What remedial sealant looks like in Holland Park
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.
As a London address, Holland Park can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. For site and facilities teams at buildings such as Holland Park 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.
Holland Park is about 1 mile north of Kensington, in Greater London. Anywhere in W8, we cover remedial sealant for homes and businesses. Our area takes in 764 places across Greater London, from the larger towns to small villages.
Jobs for remedial sealant in W8, W11 and W14 is quoted and booked the same way as anywhere else. Remedial sealant is available to properties on Dukes Lane, Milson Road and Elsham Road. You will find Holland Park on the A402 and A4204, so it’s easy for us to get to with everything needed for remedial sealant. Close by, we work in Kensington (1 mile south), Notting Hill (1 mile north), Shepherd's Bush (1 mile west), Notting Dale (1 mile north) and White City (1 mile north-west). Within a short drive, we also cover London (5 miles east), Marylebone (3 miles east), St Pancras (4 miles north-east), Shoreditch (6 miles east), Walthamstow (10 miles north-east) and Hoxton (6 miles east).
Local landmarks in Holland Park
We work in homes and buildings around Kensington Palace Green, Abdus Salam Library and Windsor Castle in Kensington pub. You’ll also find Kensington School (0.6 miles south-east) and Fox Primary School (under half a mile north-east). For rail, the closest station is Kensington Olympia station, roughly 0.5 miles south-west. Other landmarks nearby include London Museum (0.7 miles east) and St Mary Abbot's Hospital (0.7 miles south-east). Open spaces near Holland Park include Campden Hill and WWT London Wetland Centre.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Surface by surface
Mouldy bath & shower sealant
Mould that has grown into silicone doesn’t clean out for good. The sealant is cut out completely, the joint treated with a mould remover and dried before anti-fungal sanitary silicone goes in.
Windows & doors
Failed frame mastic is often hard, cracked and in several layers. All of it is cut out and the frame and wall cleaned.
For landlords and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Your questions about remedial sealant in Holland Park
Can parking be tricky for a visit in Holland Park?
Parking in Holland Park, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
I live in a flat in Holland Park. 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 is down. A proper reseal before the leak starts is the easy fix.
My shower still leaks after a reseal. Can you sort it?
Yes. There’s usually a reason: sealant over sealant, movement or another leak, and we deal with the cause first.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
Where do you work from?
Mr Mastic is based in Crawley. We cover Holland Park and the rest of Greater London, along with the rest of our area.
Do you work for landlords and businesses?
Yes. As well as homeowners, we work for landlords, agents, businesses and hotels in Holland Park.
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 will tell you what we’re using.
Do you work in Holland Park?
Yes. We work in Holland Park and the rest of Greater London, as part of our work across South East England, London and Scotland. To book, call 0345 464 0079 or drop us an email.