Greater London · England

Fire-rated sealant in North End, Greater London

Our applicators work in North End on intumescent and fire-rated sealant around gaps, frames and service penetrations. Old sealant removed completely, joints prepared properly.

  • Fire stopping disturbed by later work
  • Cracked or shrunken fire-rated sealant
  • Open joints along the top of partitions

Fire rated sealant near North End

Why deal with it now?

Fire-rated sealants need more care than everyday sealant. How it’s installed changes how it performs, so we follow the maker’s details on every gap. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble for homes in North End.

We do not 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 and we will talk you through it.

What you get with us

  • We leave the area clean and tidy
  • One-year guarantee on every job
  • Domestic, commercial and hotel work
  • An ARBOMaster approved applicator

Take a look at what affects the cost and what customers say.

Fire rated sealant in North End

Door frame gaps, linear joints and holes around services all have their own details. We check the size and the substrate before choosing the product, then apply it to the depth its tested detail calls for. If you have unsealed gaps around fire door frames and gaps left after a refit or conversion, we can put it right, whatever the surface.

London’s offices, shops, hotels, student accommodation and blocks of flats all have joints to look after, 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 North End can’t close.

We stand behind the work with a 12-month guarantee.

Eleven members of the Mr Mastic team standing in front of branded white vans
Place
North End (DA8, DA1, DA7)
Wider area
Greater London
Guarantee
One year on every job
Price
Quoted before any work starts
Phone
0345 464 0079
Last updated
26 October 2026

How the visit works

Before we leave, we go over the finished joints with you and tell you how long to leave it. The work normally takes from a few hours to a few days, depending on the number of gaps and the access, depending on the size of the job. In North End, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.

  1. Before starting, we go through the specification or action list with you.
  2. We measure every gap and note what it’s in and what passes through.
  3. Any non-fire-rated filler is removed.
  4. We fit backing where needed and apply the fire-rated sealant to depth.
  5. We hand over a list of locations and products for your files.

Getting ready for the visit

  • For indoor joints, keep the area dry beforehand if you can
  • For business premises, tell us about site rules or sign-in
  • Mention any tricky access

Ask for a quote

Call for a quick quote, or email us if that is easier. Describe what needs sealing and we’ll talk you through the work before giving you a price.

Ask for a quote

Related advice

Your questions about fire rated sealant in North End

Is parking an issue for fire rated sealant in North End?

It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.

I let a flat near Slade Green station. Can you help?

Yes, we work for landlords and letting agents. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before we start.

What do you need from me for a quote?

Only a few details: where it is, what you’ve noticed and how we reach it. Then call 0345 464 0079 or drop us an email.

Will the old sealant be removed?

Yes. All of the old material is cut out and the joint cleaned before resealing.

Do you seal gaps around fire door frames?

Yes. We often seal open gaps hidden behind the architrave. Doors, seals and closers need a door specialist.

Is intumescent sealant the same as fire-rated sealant?

Intumescent means it swells when heated, helping close the gap. It’s one type of fire-rated sealant; which product suits depends on the gap, the substrate and the service.

Will there be a smell?

It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.

Will it make a mess?

No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.

Surface by surface

Plasterboard walls

We check that the board around the gap is sound. Loose material is removed so the sealant has a firm edge.

Flats and HMOs

Flats and HMOs rely on fire separation between homes and the common parts. We seal the gaps your assessor has identified.

Aftercare tips

Joint life depends on how it’s used and looked after. We suggest:

  • Store the list of sealed gaps with your building paperwork
  • Include hidden areas like risers in routine checks
  • Take photos of fire stopping before ceilings or boxing go back
  • Check whether a sealant can be painted before decorating over it

File the record of locations and products with your fire safety paperwork. It saves time at the next inspection or assessment.

If a fire risk assessment has flagged a gap, don’t leave it for the next one. Have it sealed, then keep the record so you can show it was dealt with.

Fire rated sealant around North End

Commercial buildings in London often have strict access rules and limited loading, 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 work to the specification you’re given, installing the product to its tested details.

North End is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. For buildings such as St. Augustine's Church, gaps around pipes and cables are worth checking after any building work there.

North End is about 2 miles north-west of Dartford, in Greater London. Homes, rented property, offices and hotels in North End can book us for fire rated sealant. Every job comes with our 12-month guarantee. North End is one of 764 places in Greater London we cover for fire rated sealant. For nearby work, see our London page (13 miles or so).

We work across DA8, DA1 and DA7 for fire rated sealant and the streets around it. Streets in the area include Oak Road, Elm Road and Moat Lane. Neighbouring places we cover for fire rated sealant include Slade Green (1 mile east), Barnes Cray (1 mile south), Bexley Riverside (1 mile west), Barnehurst (1 mile west) and Northumberland Heath (1 mile west). Within a short drive, we also cover London (13 miles west), City of Westminster (15 miles west), Marylebone (15 miles west), St Pancras (14 miles west), Shoreditch (12 miles west) and Walthamstow (13 miles north-west).

What’s near North End

Locally, jobs take us to homes and businesses close to Railway Tavern, Braeburn Park and Haberdashers' Aske's Crayford Academy. North End has its own railway station: Slade Green station. Nearby you will also find Erith Museum (1.2 miles north-west) and Erith and District Hospital (1.4 miles north-west). Green spaces nearby include Wansunt Pit.

Map of North End © OpenStreetMap contributors

Landlords, agents and businesses in North End

Housing providers, facilities teams and property managers book us too in North End and across Greater London. We can quote a run of properties together, and we’re fully insured for the work.

Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.

What we’re called out for in North End

Movement in the structure can open gaps too: cracked or debonded sealant leaves an open route through the wall. Knocks, maintenance and building work damage it further.

It’s worth asking for a quote if you see:

  • Unsealed gaps where pipes and cables go through a wall
  • Unsealed gaps around fire door frames
  • New service routes left unsealed after building work
  • Cracked or shrunken fire-rated sealant

Letting a property close to Slade Green station? Then new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.

Questions to ask before you book

  • What preparation is included
  • How long to leave it before use
  • Which sealant they’ll use, and why
  • How long the guarantee is

Choosing a sealant specialist

DIY versus a professional finish

The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.

Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.

20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job