Greater London · England
Fire Rated Sealant in Canons Park
Intumescent and fire-rated sealant around gaps, frames and service penetrations for homes and businesses in Canons Park and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Fire seals that have cracked with movement
- Open holes round services passing through fire walls
- Gaps filled with a product that is not fire-rated
About our fire rated sealant in Canons Park
We can work through a building room by room or floor by floor. That record is useful for your files and for whoever looks at the building next. We work on plasterboard & masonry, service penetrations and flats & HMOs, and people most often call us about new service routes left unsealed after building work and unsealed gaps around fire door frames.
Across London, offices, shops, hotels, student halls and blocks of flats all need sealant work from time to time, whether that’s washroom resealing or fire-rated sealant around service openings. Where a building in Canons Park needs to stay open, work can be planned outside normal hours.
Every job comes with a 12-month guarantee, wherever you are in Greater London.
- Where
- Canons Park (HA8, HA7)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
Once we are on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a handful of gaps, and longer for a whole building. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Canons Park. It helps if you can point us to a visitor permit or a bay close to the door.
- 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.
- The fire-rated or intumescent sealant is applied and tooled to the tested detail.
- Locations and products are written up and any gaps unsuitable for sealant are flagged.
Before we arrive
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
- Clear the area around the work
Getting a quote
Want a quote for fire rated sealant? Please phone 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
For landlords and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
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 it’s worth doing now in Canons Park
Fire-rated sealants need more care than everyday sealant. How it’s installed changes how it performs, and we work to the product details every time. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler for homes in Canons Park.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why choose Mr Mastic in Canons Park
- Rated 4.9 stars on Google
- Trusted Arbo and Everbuild sealants
- Full insurance on every job
- Over 20 years’ experience
Take a look at how sealant jobs are priced and customer reviews.
What affects the cost of fire rated sealant
We do not publish a price list. The quote depends on:
- How many areas need sealing
- The product the joint needs
- The number and length of the joints
- The old material and how stubborn it is
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.
What we need to know
When you contact us, these details help:
- How many joints, rooms or windows are involved
- Whether it has been sealed before
- Any access issues, like height or stairs
- Where the job is, and your postcode
Asking for a quote is easy: let us know the job and the location. A few photos by email make the job easier to understand.
Different surfaces, different methods
Linear gaps
Gaps along the top of partitions are easy to miss above a ceiling. We work along the whole run.
Masonry and concrete
Masonry is dusty and porous, so preparation matters. The gap is cleaned and backed where required before applying the sealant.
Canons Park questions
Is Canons Park in your area for fire rated sealant?
Yes. We work across London and the South East, and Canons Park is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
Can you help a landlord with a rental near Mill Hill Broadway station?
Yes. We work for landlords and agents as well as householders. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Will you leave a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in, and for outside work we will agree access with you when we book.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
What’s the difference between intumescent and fire-rated sealant?
Intumescent describes a material that swells in heat. Intumescent sealants are a type of fire-rated sealant and which one is used depends on the job.
How long will you be here?
That depends on the amount of work, but most jobs take from a few hours to a few days, depending on the number of gaps and the access. We’ll give you a better idea when we quote.
Towns and villages near Canons Park
Other services in Canons Park
Fire rated sealant around Canons Park
Many London buildings have tight access and loading restrictions, so out-of-hours working can be arranged where needed. In England, the Regulatory Reform (Fire Safety) Order 2005 requires a fire risk assessment for workplaces and for the common parts of blocks of flats, which is often where open fire-stopping gaps are first noticed. We apply fire-rated sealant to the assessor’s or designer’s specification and the product’s tested details.
If you let a flat or house near Mill Hill Broadway station, fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through. Canons Park is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Schools such as Camrose Primary With Nursery are buildings too, and gaps opened by contractors for new cabling are a common finding in schools and offices.
Canons Park is about 1 mile east of Stanmore, in Greater London. Every kind of property in Canons Park can book us for fire rated sealant. Every job comes with our one-year guarantee. 764 places in Greater London are on our list. There’s also a page for London, roughly 11 miles from Canons Park.
We work across the HA8 and HA7 postcode area for fire rated sealant. If you need fire rated sealant at a property on Parr Road, Mead Road and Grove Road or anywhere close by, our applicators can take on the job. Nearby, we also carry out fire rated sealant in Little Stanmore (1 mile south-east), Edgware (1 mile north-east), Burnt Oak (1 mile east), Broadfields Estate (1 mile north-east) and The Hale (1 mile north-east). Further out, we also cover London (11 miles south-east), City of Westminster (9 miles south-east), Marylebone (9 miles south-east), Kensington (8 miles south-east), St Pancras (9 miles south-east) and Shoreditch (11 miles south-east).
Landmarks near Canons Park
Typical jobs here are in homes near Edgwarebury Park, Railway Hotel and Krishna Avanti Primary School and the streets around them. For rail, the closest station is Mill Hill Broadway station, about 1.7 miles east. A little further out are Hilfield Castle (3.7 miles north-west) and Broadwalk Centre (0.6 miles east). Not far away are Edgware Way Grassland and Darland's Lake.
Honest limits
We won’t take on work that will not last, so these are the limits:
- Fire risk assessments, which need a qualified assessor
- Doors that aren’t fire doors in the first place
- Certifying a building or signing off its fire safety
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
What we seal
- Door frames
- Service penetrations
- Plasterboard & masonry
- Linear gaps
- Flats & HMOs
- Pipe & cable gaps
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 the joint depth matters as much as the finish.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.