Greater London · England
New Cross Fire Rated Sealant
Fire rated sealant across New Cross and nearby, with old sealant always removed completely and a 12-month guarantee.
- Sealant items on a fire risk assessment action list
- New service routes left unsealed after building work
- Open joints along the top of partitions
What fire rated sealant looks like in New Cross
Workplaces and the common parts of blocks of flats in England need a fire risk assessment under the Regulatory Reform (Fire Safety) Order 2005, 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. Commercial buildings in London often have strict access rules and limited loading, so out-of-hours working can be arranged where needed.
Community buildings like St James's Church are part of the picture too: older buildings that have had new heating or wiring often have service gaps worth checking. If you look after a building such as Myatt Garden Primary School, gaps opened by contractors for new cabling are a common finding in schools and offices. As a London address, New Cross can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
New Cross is about 3 miles south-east of London, in Greater London. From the centre of New Cross to the outskirts, fire rated sealant is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 764 places across Greater London, from the larger towns to small villages.
We work across the SE8, SE14 and SE4 postcode area for fire rated sealant. You will find streets such as Ivy Road, Mona Road and Avon Road. Being close to the A2209 and A2210, New Cross is easy for our applicators to reach for fire rated sealant. If you are just outside New Cross, we cover St Johns (1 mile east), Telegraph Hill (1 mile south-west), Deptford (1 mile north-east), Nunhead (1 mile south-west) and Lewisham (1 mile south-east). We also work in nearby towns such as London (3 miles north-west), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (8 miles west), St Pancras (5 miles north-west) and Shoreditch (4 miles north-west).
Around New Cross
In New Cross, that means homes and buildings near Wickham Arms, Fordham Park and Addey and Stanhope School and the streets around them. Nearby too are St. Paul's (0.7 miles north-east) and Laban Centre (0.9 miles north-east). There’s a railway station in New Cross itself: New Cross station. Nearby you will also find Fan Museum (1.2 miles north-east) and Greenwich Castle (1.5 miles east). Open spaces near New Cross include St. James's Park Lake and Tower Hill.
Fire rated sealant in New Cross, done properly
Deciding which gaps need fire stopping is not our role; your assessor, designer or building control sets that out. What we do is apply the right product to that specification, properly and neatly. If you have open gaps behind door architraves and linear gaps at the head of walls, we can put it right, on door frames, service penetrations and plasterboard & masonry alike.
In London’s blocks of flats, service risers and common parts have pipes and cables passing through walls and floors. In New Cross, building managers may need both fire-rated sealant around those openings and new sealant in shared washrooms.
Big or small, you get the same one-year guarantee in New Cross and across Greater London.
- Where
- New Cross (SE8, SE14, SE4)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the quote in New Cross
There’s no set price list, because no two jobs are the same. The quote depends on:
- Which sealant suits the joint
- Whether old sealant or filler has to be cut out
- Any working-time requirements on site
- Any mould that needs treating
What it costs depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
When you call or email, these details help:
- Whether it’s a home or a business
- Any access issues, like height or stairs
- Photos by email, if that is easy
- Whether it has been sealed before
Need a quote? Please phone 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and give you a clear price before work begins.
What the job involves on each surface
Masonry and concrete
Holes through concrete and block are rarely neat. We measure the gap at its widest point against the product’s tested range.
Service penetrations
New gaps tend to show up where services have been added. We clean out what’s there and reseal to the right depth with backing where the detail needs it.
New Cross: your questions answered
Can parking be tricky for a visit in New Cross?
Parking in New Cross, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
I let a flat near New Cross station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can go on one quote. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.
Where is Mr Mastic based?
We are based in Crawley, and we cover South East England, London and all of Scotland.
What sealant do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Can you give us a record of the work?
Yes. Every gap we seal is listed with the product used.
Do you carry out fire risk assessments?
No, we don’t assess buildings. Once you have a specification or action list from your assessor or designer, we will quote for the sealant work on it.
Do you cover New Cross?
Yes. We are based in Crawley and work across South East England, London and Scotland.
Do you hold any approvals?
Yes. We’re approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Other services in New Cross
Landlord and commercial work in New Cross
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can go on one quote.
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together, and we are fully insured for the work.
DIY versus a professional finish
If you do try it yourself, take your time over the 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.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Why act early in New Cross
Fire-rated sealants are less forgiving than ordinary ones. Depth, backing and surface preparation all affect how a seal performs, and we work to the product details every time. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in New Cross, the repair is bigger than a sealant job.
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first and give you a clear quote before work begins.
Why us?
- ARBOMaster approved applicator
- Domestic, commercial and hotel work
- 4.9 on Google from 180+ five-star reviews
- Arbo and Everbuild products
See our cost guide or what customers say.
Aftercare tips
So the new joints stay in good condition:
- Keep the record of products and locations with your fire safety documents
- Keep general-purpose foam and caulk away from fire-stopping gaps
- Include fire stopping when you schedule refits
- Check risers, ceiling voids and cupboards during building checks
Any fire seal that is cut or drilled needs resealing to its tested detail. If you need new services through a sealed wall, plan the fire stopping as part of the job.
It’s easiest to seal gaps while they’re few and easy to reach. Leave them and each new job adds another hole and the list grows.
How the visit works
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and tidy away. Most jobs take anything from a few hours to several days, depending on how many gaps there are. In New Cross, 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.
- We fit backing where needed and apply the fire-rated sealant to depth.
- We hand over a list of locations and products.
How to prepare
- For business premises, tell us about site rules or sign-in
- Keep pets and children clear of the area while we work
- Let us know about earlier repairs to the joints
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work and give you a clear price.