Greater London · England

Fire-rated sealant in Bishopsgate, Greater London

Intumescent and fire-rated sealant around gaps, frames and service penetrations for homes and businesses in Bishopsgate and across Greater London. ARBOMaster approved applicators, fully insured, with a one-year guarantee.

  • Open joints along the top of partitions
  • Ordinary sealant used where a fire-rated product was needed
  • Open holes round services passing through fire walls

Need fire rated sealant in Bishopsgate?

What we can’t put right

We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:

  • Deciding what fire stopping a building needs
  • Problems with the door itself rather than the gap around the frame
  • Certifying a building or signing off its fire safety

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

Surfaces we seal

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

Fire rated sealant in Bishopsgate, done properly

Where services or frames pass through a fire-resisting wall or floor, the gap around them needs a fire-rated seal. We apply intumescent and fire-rated sealants to the manufacturer’s tested details for each gap, with a record of the products and locations if you need one. We are often asked to deal with fire stopping disturbed by later work and sealant items on a fire risk assessment action list, across service penetrations, door frames and linear gaps.

In London’s blocks of flats, service risers and common parts have pipes and cables passing through walls and floors. In Bishopsgate, building managers may need both fire-rated sealant around those openings and new sealant in shared washrooms.

A one-year guarantee comes as standard, so you’re covered after we have gone.

Mr Mastic applicators lined up beside the company vans, one holding a sealant gun
Place
Bishopsgate (E1, EC2A, EC1Y)
Wider area
Greater London
Guarantee
One year on every job
Quote
A clear price before work begins
Call
0345 464 0079
Updated
26 October 2026

Aftercare tips

Once the sealant has cured, a few habits help it last:

  • Allow for resealing whenever new services are run
  • Do not paint over fire sealant until it has cured
  • Photograph sealed gaps before they’re covered up
  • Store the list of sealed gaps with your building paperwork

Let contractors know where fire stopping has been done, and make sure anything they disturb is resealed with a suitable product. 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.

For landlords and businesses

Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.

We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.

Signs you need fire rated sealant in Bishopsgate

Buildings are refitted and reconfigured over the years. Conversions to flats and HMOs, and office refits, create new walls and new routes for services, with gaps to match.

People normally contact us after spotting something like this:

  • Unsealed gaps around fire door frames
  • Linear gaps at the head of walls
  • Holes left by a change of layout
  • Gaps flagged on a fire risk assessment

Rented homes near London Liverpool Street station change hands often, and fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through.

What your quote should include

  • What insurance they hold
  • Whether all the old sealant comes out first
  • What product goes in the joint
  • Whether you can choose the colour

10 questions to ask before booking

Fire rated sealant in Bishopsgate: local notes

There are hotels and other places to stay in and around Bishopsgate. Hotel work can be planned room by room, with out-of-hours working 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, and gaps around services are often picked up there. We apply fire-rated sealant to the assessor’s or designer’s specification and the product’s tested details.

As a London address, Bishopsgate can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Schools such as The London School of Barbering are buildings too, and service openings in fire-resisting walls need checking after any refurbishment.

Bishopsgate is about 1 mile north-east of London, in Greater London. Bishopsgate gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across Greater London, we cover 764 places, Bishopsgate among them.

Our applicators cover all of the E1, EC2A and EC1Y postcode area for fire rated sealant. You will find streets such as Bush Lane, Swan Lane and Love Lane, all of which we cover. You’ll find Bishopsgate on the A3 and A10, which makes it straightforward to reach with everything needed for fire rated sealant. We also cover Aldgate (1 mile south-east), Spitalfields (1 mile east), City of London (1 mile west), Tower Hill (1 mile south) and Whitechapel (1 mile east). Larger places within reach include City of Westminster (3 miles west), Marylebone (3 miles west), Kensington (5 miles west), Walthamstow (5 miles north-east), Hampstead (5 miles north-west) and Ruislip (15 miles west).

Near you in Bishopsgate

We work in homes and buildings around Bishopsgate Institute Special Collections and Archives, St Mary-at-Hill and The Aldgate School, among other places. Also close by are White Hart pub (within half a mile north-east), Central Foundation Boys' School (0.7 miles north) and Finsbury Circus (less than half a mile north-west). There’s a railway station in Bishopsgate itself: London Liverpool Street station. Well-known places in the area include London Bridge Hospital (0.7 miles south) and Gabriel's Wharf (1.2 miles south-west). The countryside around Bishopsgate includes St. James's Park Lake and Tower Hill.

Map of Bishopsgate © OpenStreetMap contributors

Can I do it myself?

Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.

Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.

Common questions in Bishopsgate

I let a flat near London Liverpool Street station. Can you help?

Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.

Is parking a problem for a job in Bishopsgate?

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

Is it OK to seal over old sealant?

No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. We remove it all first.

Will you leave a mess?

Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.

Can you fill the gap behind a fire door frame?

Yes. The joint between frame and wall is sealed with a fire-rated sealant, to the product’s details. The door leaf and its hardware need a door specialist.

Can you match the sealant colour?

Generally, yes. Sealants come in white, clear, grey and other colours for many products, and we agree the colour with you before work begins.

How long will you be here?

That depends on the amount of work, but as a guide it takes from a few hours to a few days, depending on the number of gaps and the access. We will tell you when we quote.

Will there be a smell?

It depends on the product. Some products have a noticeable smell, others very little.

How it works

You don’t need to clear the whole room or building before we come, just the space around the work. Everything nearby is protected, and the work takes from a few hours to a few days, depending on the number of gaps and the access in most cases. In Bishopsgate, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.

  1. Before starting, we go through the specification or action list with you.
  2. Each gap is measured and its substrate and service noted.
  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.

Before we arrive

  • Tell us if parking is tricky
  • Mention any tricky access
  • Try not to wet indoor joints just before the visit

Getting a quote

Every job is quoted individually. Simply call 0345 464 0079 or drop us an email and describe the job and send pictures if you have them.

Get a price

Read more

How we quote for fire rated sealant

Your quote is based on your job. We look at:

  • Access and height
  • How much there is to do
  • The product the joint needs
  • Any working-time requirements on site

A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, call 0345 464 0079 or email us for an honest opinion and a quote.

Helping us quote

The more you tell us, the more accurate the quote. When you ask for a quote, tell us:

  • If someone has resealed it before
  • Any access issues, like height or stairs
  • The rough size of the job
  • A few pictures by email, if you can

Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job.

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