Greater London · England
Bathroom & kitchen resealing in Kensington, Greater London
Bath, shower, basin, wet room, worktop and sink resealing for Kensington, backed by a 12-month guarantee. Call for a quick quote.
- Mouldy sealant that has gone black
- Lumpy, uneven sealant from a DIY attempt
- Two layers of silicone, both failing
Bathroom resealing in Kensington, done properly
With over 20 years in the trade, we reseal baths, showers and kitchens in homes across Kensington. We are fully insured ARBOMaster approved applicators, and the work comes with a 12-month guarantee. We work on wet rooms, basins & vanity units and sinks & splashbacks, and the jobs we see most are leaking joints on a shower screen and gaps where the bath or tray has moved.
Across London, a large share of homes are flats, conversions or mansion blocks, so a bathroom is often directly above a neighbour’s ceiling. In Kensington, that’s a good reason to put tired sealant and grout right early.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Kensington (W11, W8, W14, SW7)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Aftercare tips
Good habits help new joints last longer. A few tips:
- Open a window or run the fan so the room dries
- Move toiletries away from the joint
- Avoid abrasive pads on the sealant
- Wipe up water along the back of the worktop
Do not stand bottles along the bead, because they trap water against the silicone. Squeegeeing the walls and tray after use keeps water from sitting on the joint.
Worktop joints fail quietly. Water gets behind the upstand and into the edge of a laminate worktop, where it can make the board swell. Resealing before that happens protects the worktop.
How it works
A visit follows a simple pattern: we check the joints, protect the area around them, do the work and clear up. It usually takes a couple of hours for one bath or shower, or most of a day for a full bathroom and kitchen. In Kensington, 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.
- We cover the area around the joints we are working on.
- We cut away the old sealant and clean off what’s left.
- Mould is treated, then the joint is left to dry thoroughly.
- Baths are filled first, then anti-fungal sanitary silicone is applied in a colour to suit.
- The joint is finished neatly and we explain when it can get wet.
How to prepare
- For business premises, tell us about site rules or sign-in
- Tell us about any previous sealing or DIY attempts
- Clear the area around the work
Get a quote
Need a quote? Please call 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and give you a clear price before any work starts.
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Towns and villages near Kensington
More services for Kensington
When to call us in Kensington
The wrong product fails fast. Decorators’ caulk and all-purpose sealants are not made for constant wetting, so they stain, crack or go mouldy before long. Wet areas call for a sanitary silicone with an anti-fungal additive.
Signs it’s time to call us include:
- A joint torn by a bath that flexes
- Black mould in the silicone that will not clean off
- Water getting behind the bath panel
- Cracked, shrunken or lifting silicone
As a London address, Kensington can be tricky for parking: let us know about parking bays, permits or a driveway.
Comparing quotes
- Whether the sealant suits the joint
- Whether all the old sealant comes out first
- What preparation is included
- What insurance they hold
DIY sealant or a professional job?
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.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
How we quote for bathroom resealing
Some jobs are bigger than they look, and some smaller. What affects the quote:
- When we can work, for business premises
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
- Which sealant suits the joint
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re not sure whether it needs doing, phone 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Asking for a quote
When you call or email, it’s useful to know:
- Roughly how big the job is
- The address or postcode of the job
- Any access issues, like height or stairs
- What’s wrong with the joints now
We quote each job on its own. Simply call 0345 464 0079 or drop us an email and describe the job and send photos if you have them.
Kensington: your questions answered
Do you work for hotels and guest houses in Kensington?
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 worn sealant in a flat in Kensington cause a leak downstairs?
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 do kitchens as well as bathrooms?
Yes, often alongside a bathroom. Next to the sink we use a food-safe product where it’s needed.
Do you come to Kensington?
We do. Our applicators work in Kensington, and the service is the same as everywhere else.
How long before the new sealant can get wet?
Generally after around 24 hours. We will tell you the cure time for the product we used.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Do you remove the old sealant?
Yes, every time. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and we will quote it together.
Landlord and commercial work in Kensington
Housing providers, facilities teams and property managers book us too in Kensington and across Greater London. We can quote a run of properties together, and we’re fully insured.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Why deal with it now?
Most of the work in a good reseal happens before any silicone goes on: cutting out every trace of the old bead, cleaning, treating mould and letting the joint dry. Without that preparation, the new bead won’t last. In a flat in Kensington, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or email us.
Why choose Mr Mastic in Kensington
- We agree the colour with you first
- Tidy, careful work
- Trusted Arbo and Everbuild sealants
- A choice of colours where the product allows
See our cost guide and what customers say.
Bathroom resealing around Kensington
London’s water is hard, so limescale builds up on sealant, grout and fittings. 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.
Homes close to Church of St Barnabas include some older properties, and walls and floors in older homes can move, and sealant and grout show it first. For landlords with property near Kensington Olympia station, fresh sealant around the bath, shower and sink between tenancies helps a property present well and keeps leaks at bay.
Kensington is about 5 miles west of London, in Greater London. We provide bathroom resealing to householders, landlords and businesses in Kensington and nearby. Kensington is one of 764 towns and villages in Greater London where we work.
Every address in W11, W8, W14 and SW7 is within our area for bathroom resealing. That includes homes and businesses on Kensington High Street, Edwardes Square and Somerset Square. Main roads around Kensington include the A402 and B316, which makes travel easy. Nearby, we also carry out bathroom resealing in Holland Park (1 mile north), 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 north-east), St Pancras (4 miles north-east), Shoreditch (6 miles east), Walthamstow (10 miles north-east) and Hoxton (6 miles north-east). As one of the bigger places in Greater London, Kensington has homes, rented property and businesses of every kind.
Near you in Kensington
Locally, jobs take us to homes and businesses close to Holland Park, Scarsdale Tavern and Holland Park School, among other places. Nearby too are Kensington School (0.5 miles east) and Abdus Salam Library (1 mile east). There’s a railway station in Kensington itself: Kensington Olympia station. Well-known places in the area include Kensington Arcade (within half a mile east) and London Museum (0.7 miles north-east). Green spaces nearby include WWT London Wetland Centre and The Long Water.