Greater London · England
Fire Rated Sealant in Brockley
Intumescent and fire-rated sealant around gaps, frames and service penetrations in Brockley, with a 12-month guarantee on every job. Ask us for a quote.
- Fire seals that have cracked with movement
- Door frames with gaps between frame and wall
- Open joints along the top of partitions
What the job involves on each surface
Plasterboard walls
Plasterboard partitions are common in flats, offices and conversions. We use a product tested in that kind of wall for the gap we’re sealing.
Linear gaps
Linear gaps run along the head of walls, at floor edges and between panels. We seal them to the tested detail, with backing where it’s needed.
How we handle fire rated sealant in Brockley
Until it’s heated, intumescent sealant behaves like an ordinary sealant; 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 work to the manufacturer’s details. We work on service penetrations, plasterboard & masonry and pipe & cable gaps, and common reasons people get in touch are holes left by a change of layout and open gaps behind door architraves.
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 Brockley, that can mean fire-rated sealant around service openings as well as resealing in shared washrooms and kitchens.
Our work is backed for twelve months, in Brockley and everywhere else we cover.
- Place
- Brockley (SE4, SE23, SE6)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the quote in Brockley
Jobs vary more than people expect. What affects the quote:
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
- Working hours on commercial sites
- Access and height
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- If it’s domestic, commercial or a hotel
- How many joints, rooms or windows are involved
- Pictures of the joints, sent by email
- What the problem is, such as mould, gaps, leaks or cracking
Need a quote? Please call 0345 464 0079 or send us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Brockley questions
Is parking a problem for a job in Brockley?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Is Brockley in your area for fire rated sealant?
Yes, Brockley is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
Is it OK to seal over old sealant?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Are you fully insured?
Yes. Mr Mastic is fully insured.
Can I use normal mastic around a pipe through a fire wall?
No. Ordinary silicone, caulk or foam is not tested as fire stopping. We cut it out and reseal with a fire-rated product.
Do you work in flats, HMOs and commercial buildings?
Yes. Flats, HMOs, offices, schools and other occupied buildings are all part of our work. The order of work and access are planned with you.
Will it make a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Do you carry out fire risk assessments?
No, assessment is not something we do. When your assessor or designer has set out what’s needed, we can quote for the fire-rated sealant items.
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Don’t fill fire-stopping gaps with ordinary foam or silicone
- Include fire stopping when you schedule refits
- Include hidden areas like risers in routine checks
- Take pictures of fire stopping before ceilings or boxing go back
Keep the record we give you with the building’s fire safety documents. It saves time at the next inspection or assessment.
An open gap isn’t only a fire issue: noise, draughts and even pests can come through too. Sealing them early helps on every front.
Landlords, agents and businesses in Brockley
We work for landlords and letting agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
Housing providers, facilities teams and property managers book us too in Brockley and across Greater London. We can quote a run of properties together, and we’re fully insured.
Common problems we fix in Brockley
Buildings are refitted and reconfigured over the years. A house turned into flats or an HMO, or an office split into smaller units, brings new walls, new service routes and new gaps.
These are the problems we are asked about most:
- New service routes left unsealed after building work
- Open joints along the top of partitions
- Cracked or shrunken fire-rated sealant
- Fire stopping disturbed by later work
Brockley is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Before you book anyone
- Whether VAT is included
- How the colour is chosen
- How hidden problems are handled
- Are they insured?
Leave it or put it right?
Waiting for the next refit can leave a gap open for years. On its own, sealing it now is a small job and needn’t wait for anything else. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Brockley, the repair is bigger than a sealant job.
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.
Why us?
- Old sealant always removed completely
- Full insurance on every job
- More than 20 years in sealant work
- Approved under the ARBOMaster scheme
Places near Brockley
What else we do in Brockley
Workplaces and buildings in Brockley
Many London buildings have tight access and loading restrictions, so out-of-hours working can be arranged where needed. Workplaces and the common parts of blocks of flats in England need a fire risk assessment under the Regulatory Reform (Fire Safety) Order 2005, 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.
Schools such as Beecroft Garden Primary are buildings too, and service openings in fire-resisting walls need checking after any refurbishment. For landlords with property near Crofton Park station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
Brockley is about 1 mile south of New Cross, in Greater London. For fire rated sealant in and around Brockley, it’s easy to get a quote: please ring 0345 464 0079 or email us. We cover Greater London from our Crawley base. Across Greater London, we cover 764 places, Brockley among them.
We cover every part of the SE4, SE23 and SE6 postcode area for fire rated sealant. If you need fire rated sealant at a property on Ivy Road, Nash Road and Lindal Road or anywhere close by, we can help. We also cover the places around Brockley: Crofton Park (1 mile south-east), Honor Oak (1 mile west), Ladywell (1 mile east), Forest Hill (1 mile south-west) and Nunhead (1 mile north-west). Further out, we also cover London (4 miles north-west), City of Westminster (7 miles north-west), Marylebone (7 miles north-west), Kensington (8 miles north-west), St Pancras (6 miles north-west) and Shoreditch (5 miles north).
What’s near Brockley
We work in homes and buildings around Blythe Hill Tavern, Allenby Tutorial Trust and Blythe Hill Fields, among other places. Brockley has its own railway station: Crofton Park station. A little further out are Horniman Museum and Gardens (1.4 miles south-west) and University Hospital Lewisham (0.7 miles east). The countryside around Brockley includes One Tree Hill and Knight's Hill.
How the visit works
Once we’re on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take from a few hours to a few days, depending on the number of gaps and the access. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We go through the gaps on your list or survey and check each one’s size and substrate.
- Old or unsuitable sealant is cut out and the gap cleaned.
- Where the tested detail needs backing or fill, we fit it.
- The sealant goes in to the depth its detail sets, then it’s tooled off.
- We record the locations and products used for your records.
Getting ready for the visit
- Mention if the joints have been sealed before
- Plan for the work area to be out of bounds to pets and children
- Mention any sign-in or site rules at work premises
Ask for a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.