Greater London · England
Fire-rated sealant in Lower Holloway, Greater London
Fire rated sealant across Lower Holloway and nearby, with every bit of old sealant taken out first and a one-year guarantee.
- Fire stopping disturbed by later work
- Gaps filled with a product that isn’t fire-rated
- Unsealed gaps where pipes and cables go through a wall
About our fire rated sealant in Lower Holloway
Where services or frames pass through a fire-resisting wall or floor, the gap around them needs a fire-rated seal. Each gap is sealed to the product maker’s tested detail for its size and substrate. Typical jobs include gaps filled with a product that isn’t fire-rated and linear gaps at the head of walls, across flats & HMOs, service penetrations and pipe & cable gaps.
In London, a commercial job often starts with access: loading bays, building rules and lifts. For a building in Lower Holloway, we agree timings and access before anything starts.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Location
- Lower Holloway (N7, N1, N5)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
We work for landlords and letting agents as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
FAQs for Lower Holloway
Can you help a landlord with a rental near Caledonian Road & Barnsbury station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Can parking be tricky for a visit in Lower Holloway?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Where are you based?
Mr Mastic is based in Crawley. We cover Lower Holloway and the rest of Greater London, along with the rest of our area.
Do you come to Lower Holloway?
Yes. We cover Lower Holloway and the rest of Greater London, as part of our work across South East England, London and Scotland. For a quote, call 0345 464 0079 or send us an email.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can ordinary silicone be used in a fire-stopping gap?
No. Ordinary silicone, caulk or foam is not tested as fire stopping. We cut it out and reseal with a fire-rated product.
Are you fully insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Can I choose the sealant colour?
Most of the time, yes. We will tell you which colours the right product comes in.
DIY versus a professional finish
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
What the job involves on each surface
Flats and HMOs
Working in occupied flats needs some planning. We agree access to each flat and the common parts before any work starts to keep disruption down.
Masonry and concrete
Brick, block and concrete walls and floors are sealed with products tested in masonry. We clean out dust and debris before sealing so the sealant bonds.
Places near Lower Holloway
More services for Lower Holloway
Leave it or put it right?
Doing it once, properly, beats doing it twice. If the details weren’t followed, the seal may need redoing when the building is next checked. In a flat in Lower Holloway, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
What you get with us
- An ARBOMaster approved applicator
- Domestic, commercial and hotel work
- 20+ years of sealant experience
- Fully insured
Read what affects the cost or our reviews.
When something else is needed
We’d rather tell you now than do work that won’t last, so these are the limits:
- A wall that is not a fire-resisting element to begin with
- Openings too large for sealant, which need batts, boards or another system
- Doors that aren’t fire doors in the first place
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think before you book.
What we seal
- Door frames
- Plasterboard & masonry
- Pipe & cable gaps
- Flats & HMOs
- Linear gaps
- Service penetrations
Aftercare tips
How long the joints last depends on use and care. Here’s what we suggest:
- Check risers, ceiling voids and cupboards during building checks
- Take pictures of fire stopping before ceilings or boxing go back
- Do not paint over fire sealant until it has cured
- Flag any open gap you spot round a pipe or cable
Avoid covering a sealed gap with anything that isn’t part of the tested detail. Repairs should use a matching fire-rated product. We can tell you which product we used.
Any job that breaks through a wall or ceiling should include resealing. Doing it at the time avoids leaving gaps behind.
Workplaces and buildings in Lower Holloway
Many London buildings have tight access and loading restrictions, so out-of-hours working can be arranged 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.
For landlords with property near Caledonian Road & Barnsbury station, any gap left by new services in shared walls should be closed with a fire-rated product. Schools such as Sacred Heart Catholic Primary School are buildings too, and fire-stopping around service openings should be restored whenever new services go in. For buildings such as St David, gaps around pipes and cables are worth checking after any building work there.
Lower Holloway is about 2 miles north of St Pancras, in Greater London. We carry out fire rated sealant for homes and businesses in Lower Holloway, as part of our work across Greater London. Our Greater London coverage runs to 764 places, and Lower Holloway is one of them.
All of N7, N1 and N5 is covered for fire rated sealant, from the main roads to the quietest streets. Fire rated sealant is available to properties on Penn Road, Cliff Road and Lough Road and the roads around them. Main roads around Lower Holloway include the A5203, which makes travel easy. Neighbouring places we cover for fire rated sealant include Barnsbury (1 mile south), Holloway (1 mile north), Nag's Head (1 mile north), Tufnell Park (1 mile north-west) and Islington (1 mile south-east). We also work in nearby towns such as London (4 miles south), City of Westminster (3 miles south-west), Marylebone (3 miles south-west), Kensington (5 miles south-west), Walthamstow (5 miles north-east) and Whitechapel (3 miles south-east).
What’s near Lower Holloway
In Lower Holloway, that means homes and buildings near St Mary Magdalene Gardens, Musical Theatre Academy and St Mary Magdalene Academy. Other local landmarks include Vaughan Williams Memorial Library (1.6 miles south-west) and The Lamb Tavern Public House (less than half a mile west). The closest station to Lower Holloway is Caledonian Road & Barnsbury station, about 0.5 miles south. Nearby you’ll also find Arsenal Football Club Museum (0.6 miles north-east) and Montfichet's Tower (2.6 miles south). For a walk, there’s Dartmouth Park Hill and Barnsbury Wood.
How the visit works
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes anything from a few hours to several days, depending on how many gaps there are. In a London area like Lower Holloway, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We start with the survey or action list, checking the size and surfaces of every gap.
- Old or unsuitable sealant is cut out and the gap cleaned.
- Backing or fill is fitted where the product’s tested detail calls for it.
- We apply the fire-rated or intumescent sealant to the specified depth and tool it.
- Locations and products are noted so you have them on file.
How to prepare
- Let us know if you’ve seen damp or leaks
- For business premises, tell us about site rules or sign-in
- Keep pets and children clear of the area while we work
How to get a quote
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.