Greater London · England
Remedial sealant & repairs in Hammersmith, Greater London
Removing failed, mouldy or leaking sealant and putting it right for Hammersmith, backed by a 12-month guarantee. Call for a quick quote.
- A shower that leaks however often it’s resealed
- Wide, uneven beads that look worse than the old ones
- Decorators’ caulk around a bath or shower
About our remedial sealant in Hammersmith
A movement joint stops working when its sealant splits or sets hard. The old sealant comes out and backing goes in to control the depth, before resealing with a flexible product suited to the movement. If you are dealing with sealant that came away because the surface wasn’t prepared and repeat leaks from the same joint, we can help, on shrunken worktop sealant, expansion joints and failed movement joints alike.
In much of London, period terraces have been converted into flats over the years, and bathrooms were often squeezed into small rooms. A compact bathroom that steams up every day is hard on silicone and grout.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Hammersmith (W6, W14, W12, W4)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Ask why a joint failed before redoing it
- Air the bathroom so the sealant can dry
- Keep bleach and abrasives off the bead
- Keep movement joints clear of mortar and paint
Go easy on the new sealant: a mild cleaner and a soft cloth, with no blades or scourers.
Mould trapped under over-sealed joints spreads unseen. When it finally shows, the whole bead needs to come out.
Hammersmith questions
I live in a flat in Hammersmith. Can a failed seal leak into the flat 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.
Do you take on hotel work around Hammersmith?
Yes. Hotel and guest-house work is part of what we do. Jobs can be programmed room by room, with out-of-hours working possible to arrange.
Can you remove sealant that’s been put over old sealant?
Yes. It’s slower than a standard reseal, because every layer has to come out cleanly, but it’s what makes the new bead last.
Can you reseal a split movement joint?
Yes. The depth is set with backing so the sealant only bonds to the two sides, which lets it stretch.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We’ll tell you what we are using and why.
Is it messy?
Tidy work is part of the job. Nearby surfaces are protected, and the area is left clean when we finish.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Can old silicone be taken off without scratching the tiles?
Yes. The old bead is cut and lifted with tools that suit the surface, and the residue is cleaned away. We point out any damage that’s already there.
What the job involves on each surface
Leaking trays & enclosures
Where the joints are the problem, every bead is stripped and resealed with anti-fungal sanitary silicone, tray edges and screen profiles included.
Over-sealed & botched joints
Every layer has to come out, and silicone residue is cleaned off the tiles too. Only a clean joint will take a new bead.
Why it’s worth doing now in Hammersmith
Adding more sealant is the usual quick fix, and it rarely works. It doesn’t grip the old layer, so the leak carries on and there’s now more to remove. 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. Putting it right early is much less trouble.
Doing several joints on one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Why choose Mr Mastic in Hammersmith
- You choose the colour before work begins
- Approved under the ARBOMaster scheme
- Trusted Arbo and Everbuild sealants
- Rated 4.9 stars on Google
Remedial sealant in Hammersmith: local notes
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, so limescale builds up on sealant, grout and fittings.
Hammersmith is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. 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.
Hammersmith is about 1 mile west of Kensington, in Greater London. Hammersmith gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 764 towns and villages across Greater London, from the larger towns to small villages. We also work in London, around 6 miles away.
Jobs for remedial sealant in W6, W14, W12 and W4 works the same way as everywhere else we cover. Whether your property is on The Square, Ravenscourt Square and Westcroft Square or anywhere close by, our applicators can take on the job. If you are just outside Hammersmith, we cover Brackenbury Village (1 mile north-west), Brook Green (1 mile east), North End (1 mile east), West Kensington (1 mile east) and Old Chiswick (1 mile south-west). Further out, we also cover London (6 miles east), City of Westminster (4 miles east), Marylebone (4 miles north-east), St Pancras (5 miles north-east), Shoreditch (7 miles east) and Walthamstow (11 miles north-east).
Near you in Hammersmith
Locally, jobs take us to homes and businesses close to The Duke of Hammersmith pub, Brook Green and Polish Library POSK in London, among other places. The closest station to Hammersmith is Kensington Olympia station, about 0.8 miles east. Well-known places in the area include West London Hospital (within half a mile south-east) and Kurdish Museum Library and Archive (within half a mile south-west). Open spaces near Hammersmith include Campden Hill and WWT London Wetland Centre.
Honest limits
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Tiles that have come away from the wall
- Cracks in the fitting rather than the joint
- Movement from fittings that are not supported
If you’re not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer.
Surfaces we seal
- Shrunken worktop sealant
- Leaking tray & enclosure joints
- Mouldy bath & shower sealant
- Botched or over-sealed joints
- Expansion joints
- Failed movement joints
Nearby places to Hammersmith
Other services in Hammersmith
Signs you need remedial sealant in Hammersmith
Movement tears sealant that isn’t designed for it. A bath that flexes, a tray that rocks or a building joint that opens and closes split any bead that’s too stiff or too thin.
Keep an eye out for any of the following:
- Black mould underneath the bead
- Thick, messy sealant smeared over tiles
- Floor or wall movement joints that have failed
- Gaps opening along the back of the worktop
For an older house near a landmark such as Church of the Holy Innocents, bathrooms in older houses have often been refitted more than once, with sealant laid over sealant.
Questions to ask before booking
- What preparation is included
- Whether all the old sealant comes out first
- Which colour the sealant will be
- Whether VAT is included
What we do, step by step
On the day, we start by going over the job with you. Surfaces next to the work are protected before we start. The work generally takes a few hours, depending on how many layers have to come out. In Hammersmith, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents 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.
- You get the cure time and our view on why the joint failed.
How to prepare
- Move anything stored near the joints
- Mention any parking rules near the property
- Let us know about stairs, lifts or work at height
How to get a quote
Need a quote? Please ring 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.
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For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.