Greater London · England
Fire-rated sealant in Willesden, Greater London
Intumescent and fire-rated sealant around gaps, frames and service penetrations for householders, landlords and businesses in Willesden. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Linear gaps at the head of walls
- Ordinary sealant used where a fire-rated product was needed
- Open holes round services passing through fire walls
Fire rated sealant in Willesden, done properly
Door frame gaps, linear joints and holes around services all have their own details. Measuring the gap and checking what it’s made of comes first, then apply it to the depth its tested detail calls for. We work on service penetrations, plasterboard & masonry and pipe & cable gaps, and common reasons people get in touch are linear gaps at the head of walls and open holes round services passing through fire walls.
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. Out-of-hours working can be arranged where a building in Willesden cannot close.
We stand behind the work with a 12-month guarantee, so you’re not left on your own once the job is done.
- Location
- Willesden (NW10, NW2)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
The process
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The work itself takes anything from a few hours to several days, depending on how many gaps there are, including the tidy-up. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Willesden. A visitor permit or a nearby bay makes the visit run more smoothly.
- Before starting, we go through the specification or action list with you.
- We measure every gap and note what it’s in and what passes through.
- Unsuitable material such as ordinary foam or silicone is cut out and the gap cleaned.
- The specified fire-rated sealant goes in over any backing its detail requires.
- We hand over a list of locations and products for your records.
Getting ready for the visit
- Tell us if parking is tricky
- Mention any tricky access
- Mention if the joints have been sealed before
Ask for a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved.
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DIY sealant or a professional job?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Also near Willesden
What else we do in Willesden
Workplaces and buildings in Willesden
Willesden has hotels and guest accommodation in and around it. For hotels, a room-by-room programme keeps most rooms in use while the work goes on. Commercial buildings in London often have strict access rules and limited loading, so out-of-hours working can be arranged where needed.
For landlords with property near Kensal Rise station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant. Willesden is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Willesden is about 2 miles west of Hampstead, in Greater London. Wherever you are in the NW10 postcode area, our applicators can take on fire rated sealant. Our Greater London coverage runs to 764 places, and Willesden is one of them. Our London page covers work nearby.
We work across the NW10 and NW2 postcode area for fire rated sealant. Fire rated sealant is available to properties on Tudor Mews, Chaplin Road and Belton Road. Willesden is on the B453, which makes it straightforward to reach. If you’re just outside Willesden, we cover Willesden Green (1 mile south), Neasden (1 mile north-west), Church End (1 mile west), Cricklewood (1 mile north-east) and Harlesden (1 mile south-west). Larger places within reach include London (7 miles south-east), City of Westminster (4 miles south-east), Marylebone (4 miles south-east), Kensington (4 miles south-east), St Pancras (5 miles east) and Shoreditch (7 miles east).
What’s near Willesden
In Willesden, that means homes and buildings near Brondesbury College, Royal Oak Inn and Capital City Academy. Willesden’s nearest station is Kensal Rise station, about 1.1 miles south-east of the centre. Nearby you’ll also find Brent Cross Shopping Centre (2 miles north) and Brent Museum and Archives (less than half a mile east). Green spaces nearby include The Long Water and Primrose Hill.
Your questions about fire rated sealant in Willesden
Is parking a problem for a job in Willesden?
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.
Do you work for landlords with property near Kensal Rise station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
Which products do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Do you work in flats, HMOs and commercial buildings?
Yes. Occupied flats, HMOs, offices and schools are all fine and we plan access around the people using them. Early starts or out-of-hours work can be arranged where it’s needed.
How long does the job take?
A typical job takes anything from a few hours to several days, depending on how many gaps there are. Your quote will say how long we expect yours to take.
Where is Mr Mastic based?
Our base is Crawley. Our area covers South East England, London and Scotland.
Signs you need fire rated sealant in Willesden
Sealant applied too thin, without the backing its detail needs, or onto dust will not perform as it was tested. We see plenty of fire stopping that was hurried, especially where it was squeezed in at the end of a project.
Signs it’s time to call us include:
- Joints picked up in a fire-stopping survey
- Unsealed gaps around fire door frames
- Fire stopping disturbed by later work
- Fire seals that have cracked with movement
Managing a site like St Andrew and St Francis CofE Primary School? Then gaps opened by contractors for new cabling are a common finding in schools and offices.
What your quote should include
- How the surfaces are prepared before sealing
- Are they insured?
- The length of the guarantee
- Whether the sealant suits the joint
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Keep photos of seals that will be hidden
- Include fire stopping when you schedule refits
- File the fire-stopping record where your assessor can find it
- Report cracked or damaged seals as soon as you notice them
Do not add foam, filler or ordinary sealant over a fire seal. Repairs should use a matching fire-rated product. Ask us if you are not sure which product was used.
A flagged gap shouldn’t wait for the next assessment. Get it sealed and recorded.
How we quote for fire rated sealant
For a quick quote, just ask. What matters most is:
- The size of the job
- How much old sealant there is and how hard it is to remove
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
The cost depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts.
What to tell us for a quote
To make quoting easier, let us know:
- A few photos by email, if you can
- If someone has resealed it before
- What’s wrong with the joints now
- Where the job is, and your postcode
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, ring 0345 464 0079 or send us an email.
Why act early in Willesden
Doing it once, properly, beats doing it twice. If the details weren’t followed, the seal may need redoing once someone inspects it. 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. Putting it right early is much less trouble for homes in Willesden.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why book with us
- Old sealant always removed completely
- We leave the area clean and tidy
- 20+ years of sealant experience
- Every job guaranteed for a year
See our cost guide or our reviews.
When it isn’t the sealant
New sealant cannot fix everything, and we’d rather say so up front. Sealant won’t put right:
- Openings too large for sealant, which need batts, boards or another system
- Issuing a fire rating or certificate for a building
- Problems with the door itself rather than the gap around the frame
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
What we seal
- Pipe & cable gaps
- Flats & HMOs
- Door frames
- Linear gaps
- Plasterboard & masonry
- Service penetrations