Greater London · England

Fire-rated sealant in Bromley, Greater London

Our applicators work in Bromley on 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.

  • Unsealed gaps where pipes and cables go through a wall
  • Open joints along the top of partitions
  • Sealant items on a fire risk assessment action list

Fire rated sealant near Bromley

Why deal with it now?

An open gap in a fire-resisting wall is a route for smoke and fire. A proper seal lets the wall do its job again, and the sealing itself is often a contained piece of work. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Bromley, the repair is bigger than the sealant job would have been.

We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or email us.

Why book with us

  • Experience in homes, commercial sites and hotels
  • Over 20 years’ experience
  • Fully insured
  • We leave the area clean and tidy

See our cost guide or customer reviews.

Fire rated sealant for homes and businesses in Bromley

Deciding which gaps need fire stopping isn’t our role; your assessor, designer or building control sets that out. What we do is apply the right product to that specification, properly and neatly. If you’re dealing with fire stopping disturbed by later work and standard silicone or caulk in a fire-stopping gap, we can put it right, on linear gaps, flats & HMOs and pipe & cable gaps alike.

Commercial work in London comes with its own logistics: loading restrictions, building rules and tight access. For a building in Bromley, we agree timings and access before anything starts.

A one-year guarantee comes with the work, just as it does everywhere we cover.

Location
Bromley (BR2, BR1, BR6, BR5)
Wider area
Greater London
Cover
12 months on all our work
Quotes
Quoted before any work starts
Telephone
0345 464 0079
Last updated
26 October 2026
Eleven members of the Mr Mastic team standing in front of branded white vans

The process

Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes anything from a few hours to several days, depending on how many gaps there are. In a London area like Bromley, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.

  1. We plan the order of work and access, floor by floor or flat by flat.
  2. We take out any damaged or unsuitable sealant.
  3. Gaps are cleaned of dust and loose material.
  4. The fire-rated or intumescent sealant is applied and tooled to the tested detail.
  5. Locations and products are written up and any gaps unsuitable for sealant are flagged.

How to prepare

  • Clear the area around the work
  • For indoor joints, keep the area dry beforehand if you can
  • Mention any sign-in or site rules at work premises

Get a quote

We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or email us and describe the job and send photos if you have them.

Get a price

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 from the manufacturer’s details.

Door frames

Behind most architraves is a gap between frame and wall. Where it’s open, we seal it to the product’s details for that gap size so the architrave can be refitted.

Aftercare tips

No joint lasts for ever, but care makes a real difference. Our tips:

  • Plan fire stopping into any work that goes through walls or floors
  • Keep general-purpose foam and caulk away from fire-stopping gaps
  • Get damaged fire seals looked at promptly
  • Photograph sealed gaps before they’re covered up

Don’t drill through or remove a fire seal without putting it back properly. If you need new services through a sealed wall, plan the fire stopping as part of the job.

Small gaps around services are simple to deal with while there are only a few. Leave them and each new job adds another hole.

When something else is needed

We will not take on work that will not last, so these are the limits:

  • Walls or floors that weren’t built to resist fire
  • Doors that are not fire doors in the first place
  • Big openings where sealant alone isn’t the tested solution

If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.

Joints and surfaces we work on

  • Door frames
  • Plasterboard & masonry
  • Linear gaps
  • Pipe & cable gaps
  • Flats & HMOs
  • Service penetrations

Quotes for fire rated sealant in Bromley

The price is agreed before any work begins. It takes into account:

  • The type of sealant required
  • Working hours on commercial sites
  • The number and length of the joints
  • Whether the work is at height

A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.

What we need to know

You don’t need to know the technical terms. It helps if you can tell us:

  • Where the property is
  • Photos by email, if that’s easy
  • Roughly how big the job is
  • What’s wrong with the joints now

To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. We will send you a clear quote before any work starts.

DIY versus a professional finish

If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.

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.

Questions from Bromley

Is parking an issue for fire rated sealant in Bromley?

London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.

Do you work for hotels and guest houses in Bromley?

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.

Are you fully insured?

Yes. Full insurance covers our work, and we can confirm the details when we quote.

Do you seal gaps around fire door frames?

Yes. Gaps behind architraves are a common job for us. The door and its fittings are a separate job for a door specialist.

Do you cover Bromley?

Yes. We’re based in Crawley and work across South East England, London and Scotland, Bromley included.

Can I do it myself?

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.

How do I get a quote for fire rated sealant in Bromley?

We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You will get a clear quote before any work starts.

Do you provide details of the products used?

Yes. Every gap we seal is listed with the product used so it’s there for the next inspection.

Workplaces and buildings in Bromley

Commercial buildings in London often have strict access rules and limited loading, so out-of-hours working can be arranged where needed. 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.

For buildings such as Church of St Peter and St Paul, older buildings that have had new heating or wiring often have service gaps worth checking. Bromley is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Rented homes near Bromley South station change hands often, and any gap left by new services in shared walls should be closed with a fire-rated product.

Bromley is about 8 miles south-east of London, in Greater London. Homes, rented property, offices and hotels in Bromley is covered for fire rated sealant. The work is guaranteed for a year. Bromley is one of 764 towns and villages in Greater London we cover for fire rated sealant. You can also see our page for London, roughly 8 miles from Bromley.

Postcode districts we cover here for fire rated sealant: BR2, BR1, BR6 and BR5. That includes homes and businesses on High Street, Church Road and St Paul's Square and the roads around them. Being close to the A222 and A223, Bromley is simple for us to get to for fire rated sealant. If you’re just outside Bromley, we cover Sundridge (1 mile north-east), Plaistow (1 mile north), Bickley (1 mile east), Widmore (1 mile east) and Downham (2 miles north). Further out, we also cover London (8 miles north-west), City of Westminster (11 miles north-west), Marylebone (11 miles north-west), Kensington (12 miles north-west), St Pancras (10 miles north-west) and Shoreditch (9 miles north-west).

Local landmarks in Bromley

We work in homes and buildings around Bullers Wood School for Boys, The Richmal Crompton pub and Church House Gardens and the streets around them. Bromley has its own railway station: Bromley South station. Well-known places in the area include The Mall (within half a mile east) and Bromley Hospital (within half a mile south-east). Not far away are Downham Woodland Walk and Summer Hill.

Map of Bromley © OpenStreetMap contributors
20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job