Greater London · England
Roxeth Fire Rated Sealant
Our applicators work in Roxeth on intumescent and fire-rated sealant around gaps, frames and service penetrations. Old material cut out, joints cleaned and sealed neatly.
- Open holes round services passing through fire walls
- Cracked or shrunken fire-rated sealant
- Open joints along the top of partitions
Fire rated sealant in Roxeth, done properly
A gap around a door frame, a linear joint at the head of a wall and a hole round a pipe are each sealed differently. Measuring the gap and checking what it’s made of comes first, then apply it to the depth its tested detail calls for. If you have linear gaps at the head of walls and standard silicone or caulk in a fire-stopping gap, we can put it right.
In London’s blocks of flats, service risers and common parts have pipes and cables passing through walls and floors. For managing agents and building owners in Roxeth, that can mean fire-rated sealant around service openings as well as resealing in shared washrooms and kitchens.
All of our work is guaranteed for twelve months.
- Where
- Roxeth (HA2, HA1, UB5)
- Region
- Greater London
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Keeping the joints in good condition
So the new joints stay in good condition:
- File the fire-stopping record where your assessor can find it
- Check risers, ceiling voids and cupboards during building checks
- Make resealing part of every contractor’s brief
- Keep pictures of seals that will be hidden
Let contractors know where fire stopping has been done, and ask them to reseal anything they cut through. Later work is a common cause of damaged fire stopping.
If a fire risk assessment has flagged a gap, don’t leave it for the next one. Have it sealed, then keep the record so the item can be closed.
Leave it or put it right?
Sealant isn’t the fix for every opening. Large holes, cable bundles and plastic pipes can call for batts, collars or wraps. If a gap is not suitable for sealant, we will tell you. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Roxeth, the repair is bigger than a sealant job.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Why choose Mr Mastic in Roxeth
- Anti-fungal sanitary silicone in wet areas
- Rated 4.9 stars on Google
- Tidy, careful work
- Experience in homes, commercial sites and hotels
Take a look at how sealant jobs are priced and what customers say.
How the visit works
We keep the work tidy and contained to the joints we are treating. Expect the work to take anything from a few hours to several days, depending on how many gaps there are. In Roxeth, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- Before starting, we go through the specification or action list with you.
- We measure every gap and note what it’s in and what passes through.
- Unsuitable material such as ordinary foam or silicone is cut out and the gap cleaned.
- The specified fire-rated sealant goes in over any backing its detail requires.
- Every location is recorded with the product used.
How to prepare
- Keep pets and children clear of the area while we work
- Clear the area around the work
- Let us know about parking restrictions
How to get a quote
Every job is quoted individually, so the first step is telling us about yours. Simply ring 0345 464 0079 or email us and describe the job, and pictures are welcome.
Related advice
For landlords and businesses
Letting agents and landlords in Roxeth can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
When it is not the sealant
It helps to know what we can’t do too:
- Big openings where sealant alone is not the tested solution
- A wall that isn’t a fire-resisting element to begin with
- Assessing a building’s fire safety
If you are not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
What we seal
- Plasterboard & masonry
- Door frames
- Flats & HMOs
- Linear gaps
- Pipe & cable gaps
- Service penetrations
Nearby places to Roxeth
What else we do in Roxeth
What we are called out for in Roxeth
A lot of fire stopping is out of sight: above ceilings, inside risers and behind panels. Because nobody sees it, gaps go unnoticed until an assessor or surveyor looks.
Common reasons people contact us include:
- Damaged fire sealant left by other trades
- Gaps left after a refit or conversion
- Door frames with gaps between frame and wall
- Old fire sealant that has split or come away
Community buildings like Christ Church are part of the picture too: gaps around pipes and cables are worth checking after any building work there.
What your quote should include
- Is VAT in the price?
- How hidden problems are handled
- Whether they’re fully insured
- How the surfaces are prepared before sealing
Commercial buildings in Roxeth
Commercial buildings in London often have strict access rules and limited loading, so out-of-hours working can be arranged where needed. There are hotels and other places to stay in and around Roxeth. Hotel work can be planned room by room, with out-of-hours working where needed.
As a London address, Roxeth can be tricky for parking: let us know about parking bays, permits or a driveway. If you let a flat or house near Sudbury Hill Harrow station, fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through.
Roxeth is about 1 mile south of Harrow, in Greater London. Homes, rented property, offices and hotels in Roxeth can book us for fire rated sealant, old or new, large or small. Every job comes with our 12-month guarantee. Our Greater London coverage runs to 764 places, Roxeth among them. For nearby work, see our London page, about 12 miles away.
Postcode districts we cover here for fire rated sealant: HA2, HA1 and UB5. If you need fire rated sealant at a property on Lower Road, Grange Road and Dudley Road or anywhere close by, we can help. Neighbouring places we cover for fire rated sealant include South Harrow (1 mile south-west), Harrow (1 mile north), Harrow on the Hill (1 mile east), Northwick Park (1 mile north-east) and Rayners Lane (1 mile west). Further out, we also cover London (12 miles south-east), City of Westminster (9 miles south-east), Marylebone (9 miles east), Kensington (8 miles south-east), St Pancras (10 miles east) and Shoreditch (12 miles east).
Landmarks near Roxeth
We work in homes and buildings around The White Horse pub, Orley Farm School and Northwick Park. Roxeth’s nearest station is Sudbury Hill Harrow station, about 0.8 miles south-east. A little further out are Clementine Churchill Hospital (0.7 miles east) and Kodak Museum (1.7 miles north). Open spaces near Roxeth include Northala Fields and Perivale Wood.
Roxeth questions
Do you work in hotels near Roxeth?
Yes, hotels and guest houses are among the places we work. A room-by-room programme keeps most rooms in use while the work goes on.
Is parking a problem for a job in Roxeth?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Can you seal over the old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
Are you fully insured?
Yes. We’re fully insured.
Is there any odour?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
Can tenants book the work?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Can you fill the gap behind a fire door frame?
Yes. We often seal open gaps hidden behind the architrave. The door and its fittings are a separate job for a door specialist.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.