Greater London · England
Fire Rated Sealant in Brixton
We cover Brixton for intumescent and fire-rated sealant around gaps, frames and service penetrations. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Gaps around pipes and cables through fire-resisting walls
- New service routes left unsealed after building work
- Ordinary sealant used where a fire-rated product was needed
When something else is needed
In fairness, some problems need a different trade:
- Issuing a fire rating or certificate for a building
- Openings too large for sealant, which need batts, boards or another system
- Walls or floors that weren’t built to resist fire
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Brixton
- Service penetrations
- Plasterboard & masonry
- Flats & HMOs
- Pipe & cable gaps
- Door frames
- Linear gaps
About our fire rated sealant in Brixton
Where services or frames pass through a fire-resisting wall or floor, the gap around them needs a fire-rated seal. Each gap is sealed to the product maker’s tested detail for its size and substrate. If you are dealing with open holes round services passing through fire walls and door frames with gaps between frame and wall, we can help, on pipe & cable gaps, door frames and plasterboard & masonry alike.
Across London, offices, shops, hotels, student halls and blocks of flats all need sealant work from time to time, whether that is washroom resealing or fire-rated sealant around service openings. Where a building in Brixton needs to stay open, work can be planned outside normal hours.
Every job is covered by our 12-month guarantee.
- Place
- Brixton (SW2, SW9, SW4)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
FAQs for Brixton
I let a flat near Brixton station. Can you help?
Yes, we work for landlords and letting agents. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Do you work for hotels and guest houses in Brixton?
Yes, we work for hotels as well as homes and businesses. A room-by-room programme keeps most rooms in use while the work goes on.
What does intumescent mean?
An intumescent sealant expands when it gets hot, helping close the gap. It’s one type of fire-rated sealant; the right one depends on the gap and what passes through it.
What should I tell you?
A short description and the location. If we need more, we’ll ask.
Can you tell me how many minutes the seal will last?
That isn’t something we state or certify. Your specification sets the requirement, and we fit a product whose tested details meet it, recording the locations and products.
How much does fire rated sealant cost in Brixton?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Can you seal over the old sealant?
No, because it fails. We remove every bit of old sealant first, so the new sealant bonds properly.
Do you carry out fire risk assessments?
No. We work from the specification you give us, and apply each product to its tested details.
DIY versus a professional 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.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
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What affects the cost of fire rated sealant
You’ll get a clear quote before any work starts. It takes into account:
- The product the joint needs
- Mould in or behind the old joints
- How easy the joints are to reach
- Working hours on commercial sites
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’ll give you a clear price for the lot.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Any previous sealing or DIY work
- The problem you’ve noticed
- Where the job is, and your postcode
- Pictures of the joints, sent by email
Want a quote for fire rated sealant? Please phone 0345 464 0079 or drop us an email with a few details. We will explain what we’d do and give you a clear quote before any work starts.
What the job involves on each surface
Service penetrations
Pipes, cables and ducts passing through fire-resisting walls and floors each leave a gap. We seal it with a product tested for that service and gap size.
Plasterboard walls
Plasterboard partitions are common in flats, offices and conversions. The sealant has to be one tested in plasterboard for the gap we are sealing.
The process
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take anything from a few hours to several days, depending on how many gaps there are. In Brixton, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- Before starting, we go through the specification or action list with you.
- Each gap is measured and its substrate and service noted.
- Unsuitable material such as ordinary foam or silicone is cut out.
- We fit backing where needed and apply the fire-rated sealant to depth.
- We hand over a list of locations and products for your files.
Before we arrive
- Try not to wet indoor joints just before the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us about any previous sealing or DIY attempts
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Read more
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Never patch a fire seal with standard sealant
- Make resealing part of every contractor’s brief
- Check whether a sealant can be painted before decorating over it
- Photograph sealed gaps before they’re covered up
Leave the sealant to cure fully before painting near it. Some fire-rated sealants can be painted and some cannot.
It’s easiest to seal gaps while they’re few and easy to reach. Over time, more work adds more holes.
Commercial buildings in Brixton
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. Many London buildings have tight access and loading restrictions, so out-of-hours working can be arranged where needed.
Schools such as Sudbourne Primary School are buildings too, and gaps opened by contractors for new cabling are a common finding in schools and offices. Community buildings like Trinity Congregational Church are part of the picture too: service openings in its walls need the right fire-rated sealant, as in any building. If you let a flat or house near Brixton station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
Brixton is about 1 mile south of Stockwell, in Greater London. If you need fire rated sealant in Brixton, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We’re based in Crawley and cover Greater London, Brixton included. Across Greater London, we cover 764 places, and Brixton is one of them.
We cover every part of the SW2, SW9 and SW4 postcode area for fire rated sealant. Whether your property is on Acre Lane, Jelf Road and Trent Road or a nearby road, we can help. You’ll find Brixton on the A204 and A2217, which makes it straightforward to reach with everything needed for fire rated sealant. Other places close to Brixton include Stockwell (1 mile north), Clapham Park (1 mile west), Angell Town (1 mile north), Loughborough Junction (1 mile north-east) and Tulse Hill (1 mile south-east). We also work in nearby towns such as London (3 miles north), City of Westminster (4 miles north), Marylebone (4 miles north), Kensington (5 miles north-west), St Pancras (5 miles north) and Shoreditch (5 miles north).
Around Brixton
Around Brixton, our work takes us to homes and buildings near Trinity Arms, Max Roach Park and Trinity Academy. Brixton has its own railway station: Brixton station. Nearby you’ll also find London General Cab Company Museum (0.9 miles north) and Baynard's Castle (3.8 miles north). Open spaces near Brixton include Battersea Park Lake and Centre for Wildlife Gardening.
Why it’s worth doing now in Brixton
Doing it once, properly, beats doing it twice. Work that doesn’t follow the tested detail may have to come out again once someone inspects it. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Brixton, the repair is bigger than the sealant job would have been.
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 choose Mr Mastic in Brixton
- Full insurance on every job
- 20+ years of sealant experience
- Quality sealants from Arbo and Everbuild
- An ARBOMaster approved applicator
Read our cost guide or customer reviews.