Washroom Sealing in Kensington
Need washroom sealing in Kensington? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.
- Mould spotting along silicone joints
- Users noticing mouldy joints
- Open joints along basins and vanity units
Washroom sealing for businesses in Kensington
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
From enquiry to sign-off
Before we leave any area, the masking comes off, the area is cleaned and every joint is checked, ready for your sign-off. If an area should be left alone while the sealant cures, we say how long and put signs out. All of Greater London is in the ULEZ, and kerbside space in Kensington can be scarce. Let us know about any on-site parking or loading arrangements when you send the job details.
- Every washroom is checked joint by joint, with loose panels, leaks or damp noted for the right trade.
- We agree which rooms close and when, so users always have somewhere to go.
- We strip out the old bead and clean off the residue left behind.
- Joints are cleaned, degreased and dried before sealing.
- New sanitary silicone with anti-mould additives goes in and is tooled neat.
- Rooms reopen after the product’s cure time, and we move to the next.
What we need from you
- Point out parking and an unloading spot
- Tell us which areas need to stay in use
- Send your site hours and access windows
Getting a fixed quote
Let us know the site, the scope and your timescale, and a fixed quote will follow. The easiest way is to call the office on 01277 525 020 or email a schedule or drawings.
Read more
Washroom sealing in Kensington, done properly
Accessible toilets, shower rooms and changing rooms have joints that work harder than most: wet-floor edges, tray perimeters, basin tops and the line where flooring meets the wall. Gaps in those places let water get under the floor or behind panels, so we look at them closely. Site teams most often ask us about gaps where vanity tops meet the wall and sealant stained black around basins and showers, on urinals and WCs, accessible toilets and changing rooms and IPS panels and cubicles. Searching for sealant specialists in Kensington? Mastic Doctor has worked for contractors, FMs and building owners since 2005.
Washrooms in London offices, hotels and gyms are used hard from morning to evening. Mouldy or split sealant at vanity tops, IPS panels and urinals is replaced with anti-mould sanitary silicone, in phases so some facilities stay open.
The 12-month guarantee is for workmanship rather than wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we’re clear about what is covered before work starts.
- Place
- Kensington (W11, W8, W14, SW7)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Price
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Do you need washroom sealing in Kensington?
Sometimes the sealant fails because something behind it is moving or wet: loose fixings, a dripping trap or damp in the wall. We check for that first and tell you if another trade is needed.
Any of the following is a good reason to get the joints checked over:
- Split or peeling sealant at shower trays
- Open joints at the base of cubicle panels
- Open joints along basins and vanity units
- Discoloured joints around urinals and WC pans
At a university such as University of Westminster, under half a mile to the south-west of Kensington, summer is the usual window for resealing residence bathrooms.
What to look for in a quote
- Will RAMS and insurance details be available?
- Their pre-qualification and accreditations
- The terms of the workmanship guarantee
- Will failed sealant be removed rather than covered?
Kensington: questions and answers
Does a hotel in Kensington need to shut while its sealant is renewed?
Almost never. The work is phased so most rooms stay available. We agree the order of rooms and the timings with you before we start.
Do you work in London buildings with loading restrictions?
Yes. Inductions, permits and timed loading are routine for us in London. Send the building rules and access times with your enquiry. We allow for the ULEZ, which covers every borough
Are you CHAS accredited and on Constructionline?
Yes. We’re CHAS accredited, we’re a Constructionline member and we use CSCS-carded applicators.
Are your applicators CSCS-carded?
Yes. We use CSCS-carded applicators.
Do you work to architects’ specifications?
Yes. We follow the specification, along with the manufacturer’s installation guidance, and we raise anything unclear before work begins.
When can showers be used after new sealant?
The silicone needs time to cure before water reaches it. We plan the phasing around that so there are always rooms open.
How long does a job like this take?
The duration is planned around your programme and the access we’re given. We’ll give you an estimate of time on site when we quote.
Places near Kensington
What else we do in Kensington
Site staff or a sealant specialist?
General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint, which is what makes a joint last.
A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
Sanitary sealant for Kensington buildings
Busy London buildings need some toilets open at all times, so resealing goes floor by floor, agreed with the facilities team. There are plenty of hotels within about 2 miles of Kensington. Behind every hotel door there’s a bathroom whose sealant will need renewing sooner or later. We work a handful of rooms at a time, so the hotel keeps letting the rest.
Toilets at places like Kensington Arcade, under half a mile to the east of Kensington, are cleaned constantly, so silicone needs to be sound and smooth. At a college such as St Mellitus Theological College, 0.8 miles south-east of Kensington, washroom and kitchen sealant is best renewed in the holidays or in phases during term.
Kensington is about 5 miles west of London, in Greater London. Businesses, contractors and managing agents in Kensington can call on us for washrooms and wet areas, as part of our coverage of Greater London. We work across 764 places in Greater London.
If you need washroom sealing in W11, W8, W14 and SW7, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. We cover commercial and managed buildings on Kensington High Street, Edwardes Square and Somerset Square and the roads nearby. Access to Kensington is via the A402 and B316, so getting applicators and materials to site is simple. Just outside Kensington, we also work 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). Further afield, our area takes in 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). Kensington is one of the busier places in Greater London, and its commercial and public buildings are all within our area.
Near you in Kensington
Recent enquiries here include premises near Holland Park, Scarsdale Tavern and Holland Park School, among other places. Also close by 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. Nearby you’ll also find Kensington Arcade (under half a mile east) and London Museum (0.7 miles north-east). Not far away are WWT London Wetland Centre and The Long Water.
Why deal with it now?
A failed joint behind a basin or along a shower tray lets water run where it shouldn’t. That can lead to swollen boards, marked ceilings below and lingering smells which costs more to fix than a reseal. In Kensington, each extra visit means more notices, permits and disruption, so cutting the old sealant out fully and doing it right once is the better route.
The specified product makes a difference, as does the preparation each joint needs. Access, phasing and site rules also count.
Why choose Mastic Doctor in Kensington
- One phone line for London, the South East and Scotland
- Colours confirmed for the specified product
- A Constructionline member, so easy to vet
- Our applicators hold CSCS cards
Read what affects the cost and our accreditations and insurance.
Looking after the joints
Sealant joints are maintenance items, and their life depends on movement, exposure, cleaning and use. We suggest:
- Share your site rules when you send details
- Squeegee showers and trays after busy periods
- Act on the first split you see at a shower tray
- Note failing joints building by building
We hand each area back once the silicone has had the cure time the product needs. You’ll be told when showers and basins can be used again, and it helps if signs stay up until then.
A split joint at a shower tray can leak for a long time before anyone sees it. At that stage, boards or ceilings may need repair, so reseal when you first spot a split.
Commercial clients in Kensington
For main contractors, we work as the sealant subcontractor, on new build and refurbishment alike. We work to your programme, your specification and your site rules.
Hotels, schools, healthcare sites, offices and retail units book us directly too. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.