Greater London · England
Fire-rated sealant in Southborough, Greater London
Intumescent and fire-rated sealant around gaps, frames and service penetrations for homes and businesses in Southborough and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Gaps flagged on a fire risk assessment
- Open holes round services passing through fire walls
- Gaps left after a refit or conversion
How we handle fire rated sealant in Southborough
In flats, HMOs, offices and schools, fire stopping is often disturbed by later work. One new cable or pipe can leave a gap that nobody goes back to seal. We seal them with a product tested for that kind of gap. If you’re dealing with ordinary sealant used where a fire-rated product was needed and sealant items on a fire risk assessment action list, we can help, whatever the surface.
London blocks of flats carry pipes and cables through walls and floors in their common parts and service risers. In Southborough, building managers may need both fire-rated sealant around those openings and new sealant in shared washrooms.
A 12-month guarantee comes as standard.
- Where
- Southborough (BR2, BR1)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Common questions in Southborough
Is parking a problem for a job in Southborough?
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.
Do you work for landlords with property near Bickley station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Can you tell me how many minutes the seal will last?
We don’t certify fire stopping or quote ratings. We apply the specified product to the manufacturer’s details and giving you a record of where it went.
Is the work guaranteed?
Yes, for a year. If anything isn’t right with the work within the year, let us know and we will sort it.
Do you come to Southborough?
Yes. We work in Southborough and the rest of Greater London. For a quote, ring 0345 464 0079 or send us an email.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Do I need to be at home?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
Can you give us a record of the work?
Yes. You get a list of where we worked and what we used.
How we quote for fire rated sealant
You will get a clear quote before work begins. It takes into account:
- Whether there’s mould to deal with
- When we can work, for business premises
- Which sealant suits the joint
- Whether old sealant or filler has to be cut out
The cost depends on the size of the job, 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, so you know where you stand.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Any access issues, like height or stairs
- Where the property is
- A few photos by email, if you can
- How many joints, rooms or windows are involved
Need a quote? Please call 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Towns and villages near Southborough
Other services in Southborough
Keeping the joints in good condition
A little care helps the new joints last. We recommend:
- Include fire stopping when you schedule refits
- Photograph sealed gaps before they’re covered up
- Tell trades working in the building that fire seals must be put back
- Check risers, ceiling voids and cupboards during building checks
Keep the record we give you with the building’s fire safety documents. It helps whoever checks the building next.
Any job that breaks through a wall or ceiling should include resealing. Doing it at the time avoids leaving gaps behind.
What fire rated sealant looks like in Southborough
Many London buildings have tight access and loading restrictions, and out-of-hours working is possible to arrange. Workplaces and the common parts of blocks of flats in England need a fire risk assessment under the Regulatory Reform (Fire Safety) Order 2005, and gaps around services are often picked up there. We work to the specification you are given, installing the product to its tested details.
Managing a site like Southborough Primary School? Then gaps opened by contractors for new cabling are a common finding in schools and offices. Community buildings like St Augustine's Church are part of the picture too: gaps around pipes and cables are worth checking after any building work there. If you let a flat or house near Bickley station, any gap left by new services in shared walls should be closed with a fire-rated product.
Southborough is about 2 miles south-east of Bromley, in Greater London. Our applicators cover fire rated sealant for homeowners, landlords and businesses in Southborough and nearby, as part of our work across Greater London. Across Greater London, we cover 764 places, and Southborough is one of them. There’s also a page for London, about 10 miles away.
We cover every part of the BR2 and BR1 postcode area for fire rated sealant. Local streets include Pope Road, Crown Lane and Union Road, and we cover them all. We also cover the places around Southborough: Bromley Common (1 mile south-west), Petts Wood (1 mile east), Locksbottom (2 miles south-east), Shortlands (2 miles west) and Crofton (2 miles south-east). Further out, we also cover London (10 miles north-west), City of Westminster (12 miles north-west), Marylebone (12 miles north-west), Kensington (13 miles north-west), St Pancras (12 miles north-west) and Shoreditch (11 miles north-west).
Near you in Southborough
In Southborough, that means homes and buildings near Bishop Justus CofE School, Jubilee Country Park and The Chequers Public House, among other places. For rail, the closest station is Bickley station, roughly 0.7 miles north. Well-known places in the area include Bethlem Museum of the Mind (0.9 miles south-west) and Bridgeways Day Hospital (under half a mile south). Open spaces near Southborough include Summer Hill and Downham Woodland Walk.
Leave it or put it right?
For some gaps, sealant isn’t the right answer and another system is needed. Big openings, bundles of cables and plastic pipes may need batts, collars or wraps instead. We will say so if a gap needs something other than sealant. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Doing several joints on one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Why choose Mr Mastic in Southborough
- Rated 4.9 stars on Google
- Quality sealants from Arbo and Everbuild
- ARBOMaster approved applicator
- One-year guarantee on every job
Read our cost guide and our reviews.
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Honest limits
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Assessing a building’s fire safety
- Big openings where sealant alone is not the tested solution
- Sign-off of the building, which sits with building control or your assessor
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly.
What we seal
- Pipe & cable gaps
- Service penetrations
- Linear gaps
- Door frames
- Plasterboard & masonry
- Flats & HMOs
What we do, step by step
We keep the work tidy and contained to the area we’re working on, so you can get on with your day. Expect the work to take anything from a few hours to several days, depending on how many gaps there are, and we explain the cure time before we leave. 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.
- 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 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.
Getting ready for the visit
- Tell us about any water getting in
- Clear items away from the joints we’re working on
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved and send you a clear quote.
Related advice
What the job involves on each surface
Linear gaps
Some linear gaps have to cope with movement as well as fire. The product and depth are chosen to suit both.
Flats and HMOs
Converted houses often have gaps around old and new services. The gaps on your list are sealed with a fire-rated product.