Greater London · England

Fire-rated sealant in Widmore, Greater London

Fire rated sealant across Widmore and nearby, with every bit of old sealant taken out first.

  • Gaps left after a refit or conversion
  • Standard silicone or caulk in a fire-stopping gap
  • Open gaps behind door architraves

Fire rated sealant for Widmore homes and businesses

Fire rated sealant for homes and businesses in Widmore

Later work by other trades often breaks through fire stopping, especially in flats, HMOs, offices and schools. A new cable run or a replaced pipe can leave an open hole behind. We seal them with a product tested for that kind of gap. If you’re dealing with gaps left after a refit or conversion and gaps flagged on a fire risk assessment, we can put it right, on pipe & cable gaps, door frames and flats & HMOs alike.

Across London, offices, shops, hotels, student halls and blocks of flats all need sealant work from time to time, from washroom silicone to fire-rated sealant around pipes and cables passing through walls. Out-of-hours working can be arranged where a building in Widmore can’t close.

All our work comes with our one-year guarantee, wherever you are in Greater London.

Place
Widmore (BR1, BR2, BR7)
Wider area
Greater London
Guarantee
A year, on every job
Quote
Quoted before any work starts
Call
0345 464 0079
Updated
26 October 2026
Eleven members of the Mr Mastic team standing in front of branded white vans

What we cannot put right

Before you book, it’s worth knowing the limits:

  • Large holes that need a different fire-stopping system
  • Walls or floors that weren’t built to resist fire
  • Deciding what fire stopping a building needs

If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before you book.

What we seal

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

How we quote for fire rated sealant

Jobs vary more than people expect. What affects the quote:

  • Mould in or behind the old joints
  • How much there is to do
  • How many rooms, windows or areas are involved
  • The old material and how stubborn it is

Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.

Asking for a quote

To make quoting easier, let us know:

  • A few pictures by email, if you can
  • The address or postcode of the job
  • Any previous sealing or DIY work
  • How we’d reach the joints

Getting a quote is simple: tell us what needs doing and where. A few photos by email make the job easier to understand.

What happens on the day

Most of a good job is in the preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it usually takes from a few hours to a few days, depending on the number of gaps and the access. In Widmore, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.

  1. First we work through your list or survey, measuring each gap and checking what it’s formed in.
  2. Old or unsuitable sealant is cut out and the gap cleaned.
  3. Where the tested detail needs backing or fill, we fit it.
  4. Fire-rated or intumescent sealant is applied to the right depth and tooled.
  5. Finally, we list where we worked and what we used, for your records.

How to prepare

  • Plan for the work area to be out of bounds to pets and children
  • Where the joints are inside, avoid wetting them before we arrive
  • Tell us if parking is tricky

Get a quote

To get a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.

Get a quick quote

Related advice

Different surfaces, different methods

Plasterboard walls

Holes in plasterboard are often cut roughly for services. Gaps that are too big for sealant alone need a different detail and we’ll flag it.

Linear gaps

Some linear gaps have to cope with movement as well as fire. We choose a product and depth that suit the gap and the movement.

Aftercare tips

A little care helps the new joints last. Our advice:

  • Get damaged fire seals looked at promptly
  • File the fire-stopping record where your assessor can find it
  • Keep pictures of seals that will be hidden
  • Include hidden areas like risers in routine checks

Tell other trades that the gaps have been sealed, and ask them to reseal anything they cut through. A lot of damaged fire stopping comes from later work.

Open gaps don’t only matter in a fire: noise, draughts and even pests can come through too. Dealing with them early helps with all of these.

For landlords and businesses

We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll give you a quote.

We work for landlords and letting agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.

Why act early in Widmore

An open gap in a fire-resisting wall is a route for smoke and fire. Sealing it properly restores what the wall was there to do, and the sealing itself is often a contained piece of work. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Widmore, the repair is bigger than a sealant job.

We don’t show prices on the website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.

Why book with us

  • Arbo and Everbuild products
  • Sanitary silicone with an anti-fungal additive in wet areas
  • Tidy, careful work
  • A 12-month guarantee on all work

Read what affects the cost or our reviews.

Your questions about fire rated sealant in Widmore

Is parking a problem for a job in Widmore?

It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.

I let a flat near Bickley station. Can you help?

Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.

Which products do you use?

Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference.

Does someone need to be in?

For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you don’t need to watch us work.

What does fire rated sealant cost?

There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.

Do you have insurance?

Yes, we are fully insured for every job we do.

Is intumescent sealant the same as fire-rated sealant?

An intumescent material expands when it’s heated. Many fire-rated sealants work this way, but not all.

Do you take out the old sealant first?

Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.

Fire rated sealant around Widmore

There are hotels and other places to stay in and around Widmore. For hotels, a room-by-room programme keeps most rooms in use while the work goes on. Many London buildings have tight access and loading restrictions, and out-of-hours working is possible to arrange.

Letting a property close to Bickley station? Then new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant. If you look after a church, hall or community building such as Church of St George, older buildings that have had new heating or wiring often have service gaps worth checking. As a London address, Widmore can be tricky for parking: let us know about parking bays, permits or a driveway.

Widmore is about 1 mile east of Bromley, in Greater London. We provide fire rated sealant to homes and businesses in Widmore. Our area takes in 764 places across Greater London, large and small. For nearby work, see our London page, about 9 miles away.

All of BR1, BR2 and BR7 is covered for fire rated sealant, from the main roads to the quietest streets. You’ll find streets such as Golf Road, The Avenue and Canon Road, all of which we cover. Nearby, we also carry out fire rated sealant in Bickley (1 mile north), Elmstead (1 mile north), Chislehurst (1 mile north-east), Bromley (1 mile west) and Sundridge (1 mile north-west). Within a short drive, we also cover London (9 miles north-west), City of Westminster (12 miles north-west), Marylebone (12 miles north-west), Kensington (13 miles north-west), St Pancras (11 miles north-west) and Shoreditch (10 miles north-west).

Near you in Widmore

Around Widmore, our work takes us to homes and buildings near Bird In Hand Public House, St George's and Jubilee Country Park. There’s a railway station in Widmore itself: Bickley station. Nearby you’ll also find Bridgeways Day Hospital (1 mile south) and The Mall (1.3 miles west). The countryside around Widmore includes Summer Hill and The Tarn.

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