Greater London · England

High Barnet Fire Rated Sealant

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

  • Unsealed gaps where pipes and cables go through a wall
  • Unsealed gaps around fire door frames
  • Holes left by a change of layout

Book fire rated sealant in High Barnet

Quotes for fire rated sealant in High Barnet

Every job gets its own quote. These are the things that affect it:

  • Any mould that needs treating
  • Any working-time requirements on site
  • How much old sealant there is and how hard it is to remove
  • How easy the joints are to reach

Combining jobs into one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.

Asking for a quote

There’s no need for technical detail. It helps if you can tell us:

  • The rough size of the job
  • Whether it’s a home or a business
  • How we’d reach the joints
  • Pictures of the joints, sent by email

We quote each job on its own. Just ring 0345 464 0079 or drop us an email with the details.

Fire rated sealant for homes and businesses in High Barnet

Fire stopping only performs as intended if it’s done to the detail: correct depth, correct backing and a product suited to the surfaces. That detail is what we take care over. If you have joints picked up in a fire-stopping survey and ordinary sealant used where a fire-rated product was needed, we can help, whatever the surface.

Commercial work in London comes with its own logistics: loading restrictions, building rules and tight access. Timings and access are agreed with the building before work starts in High Barnet.

Whatever the size of the job, you get the same one-year guarantee.

The Mr Mastic team in navy uniforms in front of three Mr Mastic vans
Location
High Barnet (EN5)
Region
Greater London
Guarantee
One year on every job
Price
A clear price before we start
Call
0345 464 0079
Page updated
26 October 2026

Common questions in High Barnet

Can you do fire rated sealant in High Barnet?

Yes, High Barnet is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.

Can parking be tricky for a visit in High Barnet?

Parking in High Barnet, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.

Is it messy?

Not at all. We work neatly, protect the area around the joints and tidy up afterwards.

Is the work guaranteed?

Yes, always. Each job is guaranteed for twelve months, large or small.

Do the sealants smell?

Possibly a little. Any smell clears as the sealant cures, and ventilation helps.

What do you need from me for a quote?

A short description and the location, with photos by email if possible. If we need more, we’ll ask.

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.

Will the old sealant be removed?

Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.

What happens on the day

We bring everything the job needs with us, so you do not need to buy or prepare anything. Once we’ve agreed what’s being done, we protect the area and start. It normally takes anything from a few hours to several days, depending on how many gaps there are. For a job in High Barnet, parking and access are the things to plan: let us know about parking, the floor we’ll be working on and any lift or shared entrance.

  1. First we work through your list or survey, measuring each gap and checking what it’s formed in.
  2. We remove any old or unsuitable filler and clean the gap.
  3. Backing or fill is fitted where the product’s tested detail calls for it.
  4. Fire-rated or intumescent sealant is applied to the right depth and tooled.
  5. Locations and products are noted so you have them on file.

Preparing for the visit

  • Where the joints are inside, avoid wetting them before we arrive
  • Let us know if you’ve seen damp or leaks
  • On commercial sites, let us know about site rules

Get a quote

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

Get a quick quote

Read more

Do you need fire rated sealant in High Barnet?

Much fire stopping is hidden: in ceiling voids, service risers and behind boxing. Because nobody sees it, gaps go unnoticed until an assessor or surveyor looks.

People normally contact us when they notice one of these:

  • Gaps left after a refit or conversion
  • Open gaps behind door architraves
  • Standard silicone or caulk in a fire-stopping gap
  • Open holes round services passing through fire walls

As a London address, High Barnet can be tricky for parking: let us know about parking bays, permits or a driveway.

Comparing quotes

  • How long the guarantee is
  • Are they insured?
  • Whether you can choose the colour
  • Which sealant they’ll use, and why

Choosing a sealant specialist

Landlords, agents and businesses in High Barnet

Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.

Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.

Workplaces and buildings in High Barnet

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 apply fire-rated sealant to the assessor’s or designer’s specification and the product’s tested details. Many London buildings have tight access and loading restrictions, so out-of-hours working can be arranged where needed.

If you let a flat or house near Hadley Wood station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant. If you look after a building such as Foulds School, service openings in fire-resisting walls need checking after any refurbishment.

High Barnet is about 1 mile north-west of Barnet, in Greater London. From the centre of High Barnet to the outskirts, we cover fire rated sealant for every kind of property, from flats and houses to offices and hotels. Across Greater London, we cover 764 places, and High Barnet is one of them. For nearby work, see our London page.

Our applicators cover all of the EN5 postcode area for fire rated sealant. We cover properties on Byng Road, Park Road and Kings Road. High Barnet sits on or near the A1081. Other places close to High Barnet include Hadley (1 mile east), Arkley (1 mile south-west), Kitts End (1 mile north), Totteridge (1 mile south) and Rowley Green (2 miles west). Larger places within reach include London (12 miles south-east), City of Westminster (10 miles south), Marylebone (10 miles south), Kensington (11 miles south), St Pancras (10 miles south-east) and Shoreditch (11 miles south-east).

What’s near High Barnet

Locally, jobs take us to homes and businesses close to Susi Earnshaw Theatre School, The White Lion pub and Queen Elizabeth's School, among other places. High Barnet’s nearest station is Hadley Wood station, roughly 1.6 miles north-east of the centre. Other landmarks nearby include Spires Shopping Centre (under half a mile east) and Barnet General Hospital (0.5 miles south-west). For a walk, there’s Barnet Countryside Centre and Darland's Lake.

Map of High Barnet © OpenStreetMap contributors

How the job changes by surface

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 from the manufacturer’s details.

Masonry and concrete

For masonry and concrete, we use a product tested in that substrate. The gap is cleaned of dust first so the sealant bonds.

Aftercare tips

So the new joints stay in good condition:

  • Never patch a fire seal with standard sealant
  • Plan fire stopping into any work that goes through walls or floors
  • Ask every contractor to reseal any fire stopping they disturb
  • Flag any open gap you spot round a pipe or cable

Tell other trades that the gaps have been sealed, and ask them to reseal anything they cut through. Later work is a common cause of damaged fire stopping.

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

New sealant cannot fix everything, and we’ll tell you before work begins. It won’t solve:

  • Walls or floors that weren’t built to resist fire
  • Deciding what fire stopping a building needs
  • Fire doors that need new seals, closers or hardware

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

Joints and surfaces we work on

  • Service penetrations
  • Flats & HMOs
  • Pipe & cable gaps
  • Linear gaps
  • Door frames
  • Plasterboard & masonry
20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job