Greater London · England
Fire Rated Sealant in Stockwell
We cover Stockwell for intumescent and fire-rated sealant around gaps, frames and service penetrations. Old material cut out, joints cleaned and sealed neatly.
- New service routes left unsealed after building work
- Ordinary sealant used where a fire-rated product was needed
- Unsealed gaps around fire door frames
About our fire rated sealant in Stockwell
Fire-rated sealant closes the gaps around pipes, cables and frames where they pass through a fire-resisting wall or floor. Each gap is sealed to the product maker’s tested detail for its size and substrate. Typical jobs include open gaps behind door architraves and cracked or shrunken fire-rated sealant, across pipe & cable gaps, door frames and linear gaps.
Commercial work in London comes with its own logistics: loading restrictions, building rules and tight access. For a building in Stockwell, we agree timings and access before anything starts.
There’s a 12-month guarantee on every job, large or small.
- Place
- Stockwell (SW9, SW4, SW8)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
Masonry and concrete
Preparation counts on brick, block and concrete. The gap is cleaned and backed where required before the sealant goes in.
Door frames
Our work is the joint between frame and wall. Doors, seals and closers are for a door specialist, and we’ll say if we spot a problem with them.
Towns and villages near Stockwell
Other services in Stockwell
DIY sealant or a professional job?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Leave it or put it right?
A quick fill with any sealant to hand is not fire stopping. Fire-rated products are tested in set gap sizes, depths and substrates, so both the product and the method matter. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
What you get with us
- We are fully insured
- Quality sealants from Arbo and Everbuild
- ARBOMaster approved applicator
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at what affects the cost or our reviews.
Landlord and commercial work in Stockwell
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
For anyone letting property in or around Stockwell, several properties can go on one quote. Just tell us the addresses and what each one needs.
Stockwell: your questions answered
Is parking an issue for fire rated sealant in Stockwell?
Parking in Stockwell, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Do you take on hotel work around Stockwell?
Yes, hospitality work, including hotels, is part of what we do. Work can be planned room by room, and out-of-hours working can be arranged.
Do you offer different sealant colours?
We help you choose a colour that suits, from white and clear to greys and other shades. The choice depends on the product the joint needs.
How long does fire rated sealant take?
It depends on the size of the job, but most jobs take a few hours for a handful of gaps, and longer for a whole building. We’ll tell you when we quote.
Where is Mr Mastic based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Do you guarantee your work?
Yes. There’s a 12-month guarantee on every job, wherever you are.
Can new sealant go over the old?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Can I do it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
How it works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes from a few hours to a few days, depending on the number of gaps and the access, and the area is left clean. In Stockwell, 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.
- Before starting, we go through the specification or action list with you.
- Each gap is measured and its substrate and service noted.
- Any non-fire-rated filler is removed and the gap cleaned.
- The specified fire-rated sealant goes in over any backing its detail requires.
- Every location is recorded with the product used for your files.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Keep pets and children clear of the area while we work
- Try not to wet indoor joints just before the visit
Ask for a quote
Asking for a quote is easy: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job.
Advice
Fire rated sealant around Stockwell
Many London buildings have tight access and loading restrictions, and out-of-hours working is possible to arrange. 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, and gaps around services are often picked up there. We work to the specification you’re given, installing the product to its tested details.
As a London address, Stockwell can be tricky for parking: let us know about parking bays, permits or a driveway. Schools such as St Andrew's Church of England Primary School are buildings too, and service openings in fire-resisting walls need checking after any refurbishment. 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.
Stockwell is about 2 miles south-west of London, in Greater London. Wherever you are in the SW9 postcode area, we can carry out fire rated sealant at your property. Our area takes in 764 places across Greater London, large and small.
Our applicators cover all of the SW9, SW4 and SW8 postcode area for fire rated sealant. Streets in the area include Kay Road, West Road and Cato Road, all of which we cover. Main roads around Stockwell include the A203 and A2217, which makes travel easy. Close by, we work in Little Portugal (1 mile north), Angell Town (1 mile east), North Brixton (1 mile north-east), South Lambeth (1 mile north) and Clapham (1 mile west). Within a short drive, we also cover City of Westminster (3 miles north-west), Marylebone (4 miles north), Kensington (4 miles north-west), St Pancras (4 miles north), Shoreditch (4 miles north-east) and Walthamstow (9 miles north-east).
Landmarks near Stockwell
Typical jobs here are in homes near Max Roach Park, Lansdowne School and The Marquess Of Lorne Public House, among other places. Stockwell’s nearest station is Brixton station, roughly 0.5 miles south-east of the centre. Other landmarks nearby include Gabriel's Wharf (2.8 miles north) and Baynard's Castle (3.1 miles north). Not far away are Knight's Hill and Centre for Wildlife Gardening.
Looking after it afterwards
To keep the joints looking good and working properly:
- Keep pictures of seals that will be hidden
- Do not fill fire-stopping gaps with ordinary foam or silicone
- Ask every contractor to reseal any fire stopping they disturb
- Report cracked or damaged seals as soon as you notice them
File the record of locations and products with your fire safety paperwork. It saves time at the next inspection or assessment.
Small gaps around services are simple to deal with while there are only a few. Over time, more work adds more holes and the list grows.
Honest limits
We won’t take on work that won’t last, so these are the limits:
- Fire doors that need new seals, closers or hardware
- Sign-off of the building, which sits with building control or your assessor
- Openings too large for sealant, which need batts, boards or another system
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Where we work in Stockwell
- Flats & HMOs
- Service penetrations
- Linear gaps
- Plasterboard & masonry
- Door frames
- Pipe & cable gaps