Greater London · England
Fire Rated Sealant in Dollis Hill
Fire rated sealant in Dollis Hill from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Seals cut through by electricians, plumbers or data installers
- Gaps where walls meet ceilings or slabs
- Door frames with gaps between frame and wall
How we handle fire rated sealant in Dollis Hill
Until it’s heated, intumescent sealant behaves like an ordinary sealant; then it swells to help close the gap. The right product depends on the gap size, the substrate and what passes through, so we work to the manufacturer’s details. If you have gaps flagged on a fire risk assessment and gaps left after a refit or conversion, we can help, on service penetrations, linear gaps and door frames alike.
London blocks of flats carry pipes and cables through walls and floors in their common parts and service risers. For managing agents and building owners in Dollis Hill, that can mean fire-rated sealant around service openings as well as resealing in shared washrooms and kitchens.
Whatever the size of the job, it’s backed by our 12-month guarantee in Dollis Hill and across Greater London.
- Where
- Dollis Hill (NW2, NW10, NW9)
- Region
- Greater London
- Cover
- One year on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
We also work for property managers and facilities teams in Dollis Hill and across Greater London. Several sites can go on one quote.
What the job involves on each surface
Service penetrations
Different services need different details: metal pipes, cables and plastic pipes are not treated the same. Each one is sealed to the product’s tested detail and we flag any that need another system.
Linear gaps
A linear joint may need to allow for movement as well as fire. The product and depth are chosen to suit both.
What affects the quote in Dollis Hill
Call for a quick quote. The main things that affect it are:
- The old material and how stubborn it is
- The number of rooms or windows
- Whether the work is at height
- The product the joint needs
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference, and we will explain the quote if you ask.
What we need to know
When you call or email, these details help:
- Whether it has been sealed before
- The address or postcode of the job
- If it’s domestic, commercial or a hotel
- What’s wrong with the joints now
For fire rated sealant in Dollis Hill, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Aftercare tips
So the new joints stay in good condition:
- Look in service cupboards and ceiling voids from time to time
- Report cracked or damaged seals as soon as you notice them
- Keep pictures of seals that will be hidden
- Make resealing part of every contractor’s brief
Follow the cure time we give you before decorating over the sealant. Some fire-rated sealants can be painted and some can’t and we’ll tell you which one you have.
Leave a fire-stopping gap open and smoke can move through the building much more easily. Closing it is usually a straightforward job.
What happens on the day
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a handful of gaps, and longer for a whole building. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Dollis Hill. A visitor permit or a nearby bay makes the visit run more smoothly.
- First we work through your list or survey, measuring each gap and checking what it’s formed in.
- 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.
- The sealant goes in to the depth its detail sets, then it’s tooled off.
- Finally, we list where we worked and what we used, for your records.
Before we arrive
- Keep children and pets away from the work area
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about earlier repairs to the joints
How to get a quote
Asking for a quote is easy: let us know the job and the location. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Related advice
Common questions in Dollis Hill
Do you work in hotels near Dollis Hill?
Yes. Hotel and guest-house work is part of what we do. Jobs can be programmed room by room, with out-of-hours working possible to arrange.
Can you help a landlord with a rental near Brent Cross West station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Does someone need to be in?
That depends on where the joints are. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
How long will you be here?
That depends on how much there is to do, but as a guide it takes anything from a few hours to several days, depending on how many gaps there are. We’ll give you a better idea when we quote.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
What fire rated sealant looks like in Dollis Hill
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, which is often where open fire-stopping gaps are first noticed. We work to the specification you’re given, installing the product to its tested details. Dollis Hill has hotels and guest accommodation in and around it. For hotels, a room-by-room programme keeps most rooms in use while the work goes on.
For landlords with property near Brent Cross West station, fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through. For site and facilities teams at buildings such as Our Lady of Grace Catholic Junior School, service openings in fire-resisting walls need checking after any refurbishment. As a London address, Dollis Hill can be tricky for parking: let us know about parking bays, permits or a driveway.
Dollis Hill is about 1 mile north-east of Neasden, in Greater London. Whether you are in the middle of Dollis Hill or further out, fire rated sealant is available for homes and businesses alike. Across Greater London, we cover 764 places, Dollis Hill among them. Our London page covers work nearby.
Work in NW2, NW10 and NW9 works the same way as everywhere else we cover. Whether your property is on Brook Road, Lane Close and Crest Road or a nearby road, our applicators can take on the job. Neighbouring places we cover for fire rated sealant include Staples Corner (1 mile north-east), Neasden (1 mile south-west), Cricklewood (1 mile south-east), Willesden (1 mile south) and Brent Cross (1 mile north-east). Within a short drive, we also cover London (7 miles south-east), City of Westminster (5 miles south-east), Marylebone (5 miles south-east), Kensington (5 miles south), St Pancras (6 miles south-east) and Shoreditch (7 miles east).
Around Dollis Hill
Typical jobs here are in homes near Woodfield School, The Crown Public House and Gladstone Park and the streets around them. Dollis Hill has its own railway station: Brent Cross West station. Nearby you’ll also find Brent Cross Shopping Centre (1 mile north-east) and St Andrew's Hospital (within half a mile south). The countryside around Dollis Hill includes Darland's Lake and Parliament Hill.
Towns and villages near Dollis Hill
Other services in Dollis Hill
When it is not the sealant
In fairness, some problems need a different trade:
- Large holes that need a different fire-stopping system
- Certifying a building or signing off its fire safety
- Problems with the door itself rather than the gap around the frame
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Surfaces we seal
- Flats & HMOs
- Plasterboard & masonry
- Service penetrations
- Door frames
- Pipe & cable gaps
- Linear gaps
Why it’s worth doing now in Dollis Hill
Squirting in whichever sealant is nearest doesn’t make a fire seal. Fire-rated products are tested in set gap sizes, depths and substrates, so both the product and the method matter. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, ring 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why book with us
- 180+ five-star Google reviews
- Experience in homes, commercial sites and hotels
- We leave the area clean and tidy
- Over 20 years’ experience
Take a look at how sealant jobs are priced or customer reviews.