Greater London · England
Islington Commercial Sealant
Professional commercial sealant in and around Islington, with old sealant always removed completely.
- Washrooms that need sorting before an inspection
- Split sealant around staff kitchen worktops and sinks
- Water marks on ceilings under bathrooms
About our commercial sealant in Islington
In student and care accommodation, there are often many near-identical bathrooms. A room-by-room programme keeps the job organised, fitting around residents and staff. Typical jobs include leaking joints in shower rooms and changing areas and mouldy bathrooms flagged at a tenancy check, across hotel bathrooms, office washrooms & kitchens and rental portfolios.
London’s offices, shops, hotels, student accommodation and blocks of flats all have joints to look after, from washroom silicone to fire-rated sealant around pipes and cables passing through walls. Where a building in Islington needs to stay open, work can be planned outside normal hours.
We stand behind the work with a 12-month guarantee, so you are covered after we’ve gone.
- Location
- Islington (N1, N7, NW1, EC1V)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Workplaces and buildings in Islington
Many London buildings have tight access and loading restrictions, and out-of-hours working is possible to arrange. Islington has hotels and guest accommodation in and around it. Hotel work can be planned room by room, with out-of-hours working where needed.
Managing a site like Islington Proprietary School? Then sealant in washrooms, kitchens and changing areas can be renewed around term times or opening hours. For landlords with property near Essex Road station, sealant work can be quoted for a single flat or a whole portfolio.
Islington is about 3 miles north-east of City of Westminster, in Greater London. Jobs in Islington get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Across Greater London, we cover 764 places, Islington among them.
Work in N1, N7, NW1 and EC1V works the same way as everywhere else we cover. Streets in the area include Gibson Square, Old Royal Free Square and Cloudesley Square, all of which we cover. With the B515 and A5203 close by, Islington is simple for us to get to for commercial sealant. Other places close to Islington include Pentonville (1 mile south), Angel (1 mile south), Barnsbury (1 mile north-west), Clerkenwell (1 mile south) and Lower Holloway (1 mile north-west). Within a short drive, we also cover London (3 miles south), City of Westminster (3 miles south-west), Kensington (5 miles south-west), Walthamstow (5 miles north-east), Hampstead (3 miles west) and Ruislip (13 miles west).
Local landmarks in Islington
We work in homes and buildings around Islington Green School, The King's Head Public House and Pilsudski Institute of London. Other local landmarks include Barnard Park (under half a mile south-west) and St Mary's CofE Primary School (under half a mile east). There’s a railway station in Islington itself: Essex Road station. A little further out are King's College Hospital Charity (0.7 miles north-west) and Montfichet's Tower (1.7 miles south). Open spaces near Islington include Barnsbury Wood and Ludgate Hill.
What we do, step by step
Once we’re on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes a morning for a small washroom, and a planned programme for bigger sites. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We start by looking at the rooms and agreeing what’s needed.
- Working hours are agreed, including early starts or out-of-hours work where it can be arranged.
- Areas are protected and the failed sealant removed.
- Joints are dried, then resealed and tooled neatly.
- Housekeeping or site staff are told when each area can be used.
How to prepare
- Try not to wet indoor joints just before the visit
- Let us know about parking restrictions
- Let us know if you’ve seen damp or leaks
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Related advice
Why act early in Islington
Fixing rooms one complaint at a time is the slow way. A planned programme deals with every room in order, with less disruption and one clear quote. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Islington, the repair is bigger than a sealant job.
Doing several joints on one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will send you a clear quote for the lot.
Why us?
- A sealant colour to suit the surroundings
- Trusted Arbo and Everbuild sealants
- We agree the colour with you first
- More than 20 years in sealant work
See what affects the cost and what customers say.
Common questions in Islington
Do you work for hotels and guest houses in Islington?
Yes, hotels and guest houses are among the places we work. A room-by-room programme keeps most rooms in use while the work goes on.
Do you work for landlords with property near Essex Road station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Is it OK to seal over old sealant?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. We remove it all first.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few photos.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Islington.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before resealing.
Do you come to Islington?
Yes. We cover Islington and the rest of Greater London. To book, phone 0345 464 0079 or email us.
Places near Islington
Also in Islington
What sealant work cannot fix
We will not take on work that will not last, so here’s what sealant can’t put right:
- Cracked trays or baths rather than failed joints
- Certifying fire stopping or building compliance
- Poor ventilation that keeps bringing mould back
If in doubt, call 0345 464 0079 or send us an email and we will say what we think before booking.
What we seal
- Student & care accommodation
- Retail & leisure sites
- Hotel bathrooms
- Welfare facilities
- Rental portfolios
- Office washrooms & kitchens
When to call us in Islington
Commercial buildings settle and move with temperature, and stud walls move more than solid ones. Joints between different materials take the strain and eventually tear.
Most people get in touch when they notice something like this:
- Joints that need doing before an inspection or audit
- Repeated reseals that don’t last
- Shower leaks reaching the floor below
- Worktop sealant that has shrunk and stained
Community buildings like St Mary's Church are part of the picture too: halls and community kitchens see heavy use, and their sealant shows it.
Before booking anyone
- What product goes in the joint
- Is VAT in the price?
- How much experience the applicator has
- Is the old sealant removed completely?
DIY sealant or a professional job?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Different surfaces, different methods
Hotel bathrooms
Guest bathrooms are resealed room by room or in batches, keeping most of the hotel open. Each room is handed back with its cure time for housekeeping.
Retail & leisure sites
Shops, gyms, leisure centres and restaurants all have joints that need sealing. Work can be arranged outside opening hours where that’s possible.
What affects the quote in Islington
Some jobs are bigger than they look, and some smaller. The main factors:
- Whether the work is at height
- The size of the job
- The number of rooms or windows
- Any mould that needs treating
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before work begins.
What we need to know
To help us quote quickly, let us know:
- The problem you’ve noticed
- How we’d reach the joints
- Where the job is, and your postcode
- Whether it has been sealed before
Getting a quote is simple: let us know the job and the location. A few pictures by email make the job easier to understand, and we will take it from there.