Greater London · England

Cockfosters Fire Rated Sealant

Our applicators work in Cockfosters on intumescent and fire-rated sealant around gaps, frames and service penetrations. Old material cut out, joints cleaned and sealed neatly.

  • Unsealed gaps around fire door frames
  • Fire seals that have cracked with movement
  • Damaged fire sealant left by other trades

Fire rated sealant in Cockfosters

Do you need fire rated sealant in Cockfosters?

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.

Common reasons people contact us include:

  • Fire stopping disturbed by later work
  • Gaps where walls meet ceilings or slabs
  • Sealant items on a fire risk assessment action list
  • Open gaps behind door architraves

As a London address, Cockfosters can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.

What to look for in a quote

  • Which colour the sealant will be
  • What guarantee comes with the work
  • How the surfaces are prepared before sealing
  • Are they insured?

10 questions to ask before you book

Fire rated sealant in Cockfosters

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 the sealant goes in to the depth the product’s details set. If you’re dealing with linear gaps at the head of walls and ordinary sealant used where a fire-rated product was needed, we can help.

Commercial work in London comes with its own logistics: loading restrictions, building rules and tight access. For a building in Cockfosters, we agree timings and access before anything starts, and room-by-room programmes can be planned where needed.

We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.

Location
Cockfosters (EN4, N14)
Region
Greater London
Cover
12 months on all our work
Quote
A clear quote up front
Call
0345 464 0079
Page updated
26 October 2026
Eleven members of the Mr Mastic team standing in front of branded white vans

Landlords, agents and businesses in Cockfosters

Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.

Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.

DIY versus a professional finish

Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.

What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.

What fire rated sealant looks like in Cockfosters

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. Many London buildings have tight access and loading restrictions, and out-of-hours working is possible to arrange.

Community buildings like Christ Church are part of the picture too: service openings in its walls need the right fire-rated sealant, as in any building. If you look after a building such as Trent CofE Primary School, fire-stopping around service openings should be restored whenever new services go in.

Cockfosters is about 1 mile east of Barnet, in Greater London. Homes, rented property, offices and hotels in Cockfosters can book us for fire rated sealant. The work is guaranteed for a year. We cover 764 towns and villages across Greater London, large and small. London is on our list too, around 11 miles away.

We cover every part of the EN4 and N14 postcode area for fire rated sealant and the streets around it. If you need fire rated sealant at a property on Park Road, Grove Road and Bevan Road or anywhere close by, our applicators can take on the job. You’ll find Cockfosters on the A111, so it’s easy for us to get to. Neighbouring places we cover for fire rated sealant include New Barnet (1 mile south-west), Hadley Wood (1 mile north-west), East Barnet (1 mile south), Oakwood (1 mile south-east) and Osidge (1 mile south-east). Larger places within reach include London (11 miles south), City of Westminster (10 miles south), Marylebone (9 miles south), Kensington (11 miles south), St Pancras (9 miles south) and Shoreditch (9 miles south).

Landmarks near Cockfosters

In Cockfosters, that means homes and buildings near The Cock Inn, Trent School Cockfosters and Belmont Open Space, among other places. The closest station to Cockfosters is New Barnet station, roughly 0.8 miles west of the centre. Nearby you will also find Francis Skaryna Belarusian Library and Museum (2.8 miles south-west) and Chase Farm Hospital (2.5 miles north-east). Green spaces nearby include Covert Way and Darland's Lake.

Map of Cockfosters © OpenStreetMap contributors

Different surfaces, different methods

Service penetrations

Different services need different details: metal pipes, cables and plastic pipes are not treated the same. We follow the manufacturer’s tested detail for each.

Linear gaps

A linear joint may need to allow for movement as well as fire. We choose a product and depth that suit the gap and the movement, following the tested detail.

How we quote for fire rated sealant

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

  • How many areas need sealing
  • Whether there’s mould to deal with
  • The amount of work
  • Working hours on commercial sites

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

Helping us quote

Before you ask for a quote, have a think about:

  • The rough size of the job
  • Pictures of the joints, sent by email
  • Any previous sealing or DIY work
  • Where the job is, and your postcode

For fire rated sealant in Cockfosters, ring 0345 464 0079 or email us. Tell us what the problem is and where, and we will agree the price before any work begins.

When it is not the sealant

Honest advice matters more to us than a booking, so here’s what sealant cannot fix:

  • Walls or floors that weren’t built to resist fire
  • Certifying a building or signing off its fire safety
  • Assessing a building’s fire safety

Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly before booking.

Joints and surfaces we work on

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

What happens on the day

There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the work takes anything from a few hours to several days, depending on how many gaps there are in most cases. In Cockfosters, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.

  1. We begin by agreeing the list of gaps from your assessor’s or designer’s requirements.
  2. Each gap is measured and its substrate and service noted.
  3. Any non-fire-rated filler is removed and the gap cleaned.
  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.

Preparing for the visit

  • For indoor joints, keep the area dry beforehand if you can
  • Mention if the joints have been sealed before
  • Keep children and pets away from the work area

Get a quote

The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.

Get a quick quote

Read more

Common questions in Cockfosters

Is parking a problem for a job in Cockfosters?

In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.

Do you work for landlords with property near New Barnet station?

Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.

What does fire rated sealant cost?

We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.

Can you work in occupied buildings?

Yes. Occupied flats, HMOs, offices and schools are all fine and we plan access around the people using them. Early starts or out-of-hours work can be arranged if that suits the building.

Where do you work from?

We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.

Do you do fire sealant around door frames?

Yes, where the gap suits a sealant detail. We seal the frame-to-wall gap, not the door itself and we’ll tell you if we spot problems with the door.

Do you have insurance?

Yes, we’re fully insured for domestic and commercial work.

Do you work in Cockfosters?

We do. Cockfosters is part of the area we cover.

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