Greater London · England
Canonbury Fire Rated Sealant
Fire rated sealant for Canonbury, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Unsealed gaps around fire door frames
- Sealant items on a fire risk assessment action list
- Fire stopping disturbed by later work
About our fire rated sealant in Canonbury
Intumescent sealant looks much like any other sealant until it gets hot; then it swells to help close the gap. Which product suits a gap depends on its width, the materials either side and what runs through it, so we follow the tested detail for each one. We are often asked to deal with sealant items on a fire risk assessment action list and open gaps behind door architraves, across service penetrations, pipe & cable gaps and door frames.
London blocks of flats carry pipes and cables through walls and floors in their common parts and service risers. For managing agents and building owners in Canonbury, that can mean fire-rated sealant around service openings as well as resealing in shared washrooms and kitchens.
You are covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or send us an email.
- Where
- Canonbury (N1, N1P, E8)
- Region
- Greater London
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Quotes for fire rated sealant in Canonbury
Jobs vary more than people expect. The main factors:
- Any mould that needs treating
- The old material and how stubborn it is
- Any working-time requirements on site
- Access and height
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we’ll explain what it covers.
What to tell us for a quote
To make quoting easier, please include:
- How we’d reach the joints
- What’s wrong with the joints now
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
Every job is quoted individually. Just phone 0345 464 0079 or drop us an email with the details and send photos if you have them.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Flag any open gap you spot round a pipe or cable
- Look in service cupboards and ceiling voids from time to time
- Allow for resealing whenever new services are run
- Keep pictures of seals that will be hidden
File the record of locations and products with your fire safety paperwork. It helps whoever checks the building next.
A gap left open in a fire-resisting wall or floor lets smoke spread in ways the building wasn’t designed for. Closing it is usually a straightforward job.
Leave it or put it right?
A quick fill with any sealant to hand isn’t fire stopping. A fire-rated product only performs as tested when it’s installed to its tested detail, so both the product and the method matter. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Canonbury, the repair is bigger than the sealant job would have been.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Why choose Mr Mastic in Canonbury
- Experience in homes, commercial sites and hotels
- Approved under the ARBOMaster scheme
- Tidy, careful work
- One-year guarantee on every job
Take a look at how sealant jobs are priced or customer reviews.
Common questions in Canonbury
Can you help a landlord with a rental near Canonbury station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Can parking be tricky for a visit in Canonbury?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
What do you put in the joint?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference.
How long does fire rated sealant take?
As a guide, most jobs take anything from a few hours to several days, depending on how many gaps there are. Bigger jobs take longer.
Do you work in Canonbury?
Yes. We’re based in Crawley and work across South East England, London and Scotland.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Can you tell me which gaps need fire stopping?
No. We work from the specification you give us, and apply each product to its tested details.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
How the job changes by surface
Plasterboard walls
Plasterboard partitions are common in flats, offices and conversions. The sealant has to be one tested in plasterboard.
Masonry and concrete
Masonry is dusty and porous, so preparation matters. The gap is cleaned and backed where required before the sealant goes in.
Also near Canonbury
More services for Canonbury
DIY versus a professional finish
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.
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.
The process
We work through the job in order: protect, prepare, seal, tidy. Typically it takes a few hours for a handful of gaps, and longer for a whole building, and the area is left clean. In Canonbury, 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 plan the order of work and access, floor by floor or flat by flat.
- We take out any damaged or unsuitable sealant.
- Dust and loose debris are cleaned from each gap.
- We apply and tool the sealant to the product’s tested detail.
- Locations and products are written up and any gaps unsuitable for sealant are flagged.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Mention any tricky access
- Plan for the work area to be out of bounds to pets and children
How to 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 pictures by email if you can.
Read more
Signs you need fire rated sealant in Canonbury
Much fire stopping is hidden: in ceiling voids, service risers and behind boxing. Out of view, damage sits unnoticed until someone inspects.
These are the problems we’re asked about most:
- Gaps flagged on a fire risk assessment
- Door frames with gaps between frame and wall
- Seals cut through by electricians, plumbers or data installers
- Linear gaps at the head of walls
As a London address, Canonbury can be tricky for parking: let us know about parking bays, permits or a driveway.
Comparing quotes
- What guarantee comes with the work
- How hidden problems are handled
- When the joint can take water or movement
- Whether all the old sealant comes out first
Fire rated sealant in Canonbury: local notes
Workplaces and the common parts of blocks of flats in England need a fire risk assessment under the Regulatory Reform (Fire Safety) Order 2005, and gaps around services are often picked up there. We apply fire-rated sealant to the assessor’s or designer’s specification and the product’s tested details. Many London buildings have tight access and loading restrictions, so out-of-hours working can be arranged where needed.
Managing a site like Rotherfield Primary School? Then gaps opened by contractors for new cabling are a common finding in schools and offices. If you let a flat or house near Canonbury station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
Canonbury is about 2 miles north-east of St Pancras, in Greater London. We carry out fire rated sealant for homes and businesses in Canonbury and nearby. Our Greater London coverage runs to 764 places, Canonbury among them.
Every address in N1, N1P and E8 is covered for fire rated sealant, from the main roads to the quietest streets. Local streets include Dove Road, Essex Road and Clare Lane. Canonbury sits on or near the A1199 and A1200, which makes travel easy. Close by, we work in De Beauvoir Town (1 mile east), Mildmay (1 mile north-east), Kingsland (1 mile east), Newington Green (1 mile north) and Highbury (1 mile north-west). Larger places within reach include London (3 miles south), City of Westminster (3 miles south-west), Marylebone (3 miles south-west), Kensington (6 miles south-west), Walthamstow (4 miles north-east) and Hampstead (4 miles west).
Near you in Canonbury
In Canonbury, that means homes and buildings near Bishopsgate Institute Special Collections and Archives, City of London Academy Highbury Grove and Islington Green School and the streets around them. Other local landmarks include New Crown pub (less than half a mile north-west) and Shoreditch Park (0.6 miles south). Canonbury has its own railway station: Canonbury station. Other landmarks nearby include Montfichet's Tower (2.2 miles south) and Clowns Gallery-Museum (0.7 miles east). Open spaces near Canonbury include St. James's Park Lake and Ludgate Hill.