Greater London · England
Fire Rated Sealant in Kensington
Fire-stopping gaps in Kensington need attention? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Sealant items on a fire risk assessment action list
- Seals cut through by electricians, plumbers or data installers
- Ordinary sealant used where a fire-rated product was needed
About our fire rated sealant in Kensington
Filling a fire-stopping gap with standard silicone or caulk doesn’t make it fire-rated. Anything unsuitable comes out first and the gap is resealed with a product tested for that use. If you have open joints along the top of partitions and fire seals that have cracked with movement, we can put it right, on linear gaps, plasterboard & masonry and flats & HMOs alike.
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. Where a building in Kensington needs to stay open, work can be planned outside normal hours.
You get a one-year guarantee, the same in Kensington as everywhere else we work.
- Location
- Kensington (W11, W8, W14, SW7)
- Region
- Greater London
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How to look after the new joints
Looking after new joints is easy:
- Ask every contractor to reseal any fire stopping they disturb
- Take pictures of fire stopping before ceilings or boxing go back
- Get damaged fire seals looked at promptly
- Do not paint over fire sealant until it has cured
File the record of locations and products with your fire safety paperwork. It helps whoever checks the building next.
Leave a fire-stopping gap open and smoke can move through the building much more easily. Sealing it early is a simple step to take.
How it works
There is not much for you to do on the day. Show us the job and we will take it from there. The job generally takes a few hours for a handful of gaps, and longer for a whole building from start to finish. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- Before starting, we go through the specification or action list with you.
- Each gap is measured and its substrate and service noted.
- Any non-fire-rated filler is removed and the gap cleaned.
- We fit backing where needed and apply the fire-rated sealant to depth.
- We hand over a list of locations and products.
Getting ready for the visit
- Clear the area around the work
- Keep pets and children clear of the area while we work
- Mention any parking rules near the property
Get a quote
Want a quote for fire rated sealant? Please phone 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Advice
Nearby places to Kensington
More services for Kensington
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you’ve already had a go yourself, that’s fine. We cut it out and start again.
Why it’s worth doing now in Kensington
Squirting in whichever sealant is nearest does not make a fire seal. Fire-rated products are tested in set gap sizes, depths and substrates, which is why we match the product and the method to each gap. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler.
Leaving a failed joint generally makes the job bigger, not smaller. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
What you get with us
- We leave the area clean and tidy
- Approved under the ARBOMaster scheme
- Full insurance on every job
- Experience in homes, commercial sites and hotels
Take a look at our cost guide or customer reviews.
Signs you need fire rated sealant in Kensington
Sometimes the wrong product was used from the start: general-purpose foam, everyday silicone or caulk in a place that needed a tested fire seal. It looks sealed, but it is not fire-rated.
If you can see any of these, it’s time to have the joints looked at:
- Holes left by a change of layout
- Open joints along the top of partitions
- Standard silicone or caulk in a fire-stopping gap
- Sealant items on a fire risk assessment action list
Managing a site like St Barnabas and St Philip's CofE Primary School? Then gaps opened by contractors for new cabling are a common finding in schools and offices.
Questions to ask before booking
- Whether VAT is included
- Which sealant they’ll use, and why
- How the colour is chosen
- Who does the work, and how experienced they are
Quotes for fire rated sealant in Kensington
We quote each job individually. These are the things that affect it:
- Which sealant suits the joint
- Working hours on commercial sites
- Access and height
- How much old sealant there is and how hard it is to remove
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
When you contact us, these details help:
- The problem you’ve noticed
- How many joints, rooms or windows are involved
- Where the property is
- Whether it has been sealed before
If you’re in Kensington and need fire rated sealant, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
Landlords, agents and businesses in Kensington
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
For anyone letting property in or around Kensington, several properties can be quoted together. Just tell us the addresses and what each one needs.
Kensington: your questions answered
Do you work in hotels near Kensington?
Yes, we work for hotels as well as homes and businesses. Rooms can be done a few at a time, so the building stays open.
Is parking a problem for a job in Kensington?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and you will get one quote.
Do you remove the old sealant?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
How long does fire rated sealant take?
It depends on the size of the job, but as a guide it takes a few hours for a handful of gaps, and longer for a whole building. We’ll tell you when we quote.
What do you need from me for a quote?
A short description and the location, with pictures by email if possible. If we need more, we’ll ask.
Do you do fire sealant around door frames?
Yes, if the gap is within the product’s tested range. Our work is the gap around the frame and we will tell you if we spot problems with the door.
Where are you based?
Mr Mastic is based in Crawley. We cover Kensington and the rest of Greater London.
Workplaces and buildings in Kensington
There are hotels and other places to stay in and around Kensington. For hotels, a room-by-room programme keeps most rooms in use while the work goes on. 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.
Letting a property close to Kensington Olympia station? Then fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through. Community buildings like Church of St Barnabas are part of the picture too: gaps around pipes and cables are worth checking after any building work there.
Kensington is about 5 miles west of London, in Greater London. We provide fire rated sealant to homeowners, landlords and businesses in Kensington. Our Greater London coverage runs to 764 places, and Kensington is one of them.
We cover every part of W11, W8, W14 and SW7 for fire rated sealant. That includes homes and businesses on Kensington High Street, Edwardes Square and Somerset Square and the roads around them. Kensington is on the A402 and B316, which makes it straightforward to reach with everything needed for fire rated sealant. We also cover the places around Kensington: Holland Park (1 mile north), Notting Hill (1 mile north), Shepherd's Bush (1 mile west), Notting Dale (1 mile north) and White City (1 mile north-west). Further out, we also cover London (5 miles east), Marylebone (3 miles north-east), St Pancras (4 miles north-east), Shoreditch (6 miles east), Walthamstow (10 miles north-east) and Hoxton (6 miles north-east). Being one of Greater London’s larger places, Kensington has every kind of property, from flats to offices.
Near you in Kensington
Typical jobs here are in homes near Holland Park, Scarsdale Tavern and Holland Park School, among other places. You will also find Kensington School (0.5 miles east) and Abdus Salam Library (1 mile east). There’s a railway station in Kensington itself: Kensington Olympia station. Nearby you’ll also find Kensington Arcade (under half a mile east) and London Museum (0.7 miles north-east). The countryside around Kensington includes WWT London Wetland Centre and The Long Water.