Greater London · England
Fire Rated Sealant in Erith
Intumescent and fire-rated sealant around gaps, frames and service penetrations for homeowners, landlords and businesses in Erith. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Fire seals that have cracked with movement
- Damaged fire sealant left by other trades
- Holes left by a change of layout
The process
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a handful of gaps, and longer for a whole building, and the area is left clean. In Erith, as in most of London, parking needs a little planning. 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.
- We remove any old or unsuitable filler and clean the gap.
- 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.
- Finally, we list where we worked and what we used, for your records.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
Ask for a quote
For a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before we start.
Related advice
How we handle fire rated sealant in Erith
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. We’re often asked to deal with fire stopping disturbed by later work and old fire sealant that has split or come away, across flats & HMOs, pipe & cable gaps and linear gaps.
Commercial work in London comes with its own logistics: loading restrictions, building rules and tight access. Timings and access are agreed with the building before work starts in Erith.
A 12-month guarantee comes as standard, so you are not left on your own once the job is done.
- Location
- Erith (DA8, DA17, DA7)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
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 we are called out for in Erith
Gaps around door frames are easily missed. The gap between the frame and the wall is hidden behind the architrave, so it’s easy to leave unsealed when doors are changed.
The most common problems we see are:
- Open joints along the top of partitions
- Fire stopping disturbed by later work
- New service routes left unsealed after building work
- Gaps around pipes and cables through fire-resisting walls
If you let a flat or house near Erith station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
Questions to ask before you book
- What the cure time is
- Which colour the sealant will be
- Who turns up on the day
- Is the old sealant removed completely?
Why act early in Erith
Waiting for the next refit can leave a gap open for years. On its own, sealing it now is a small job that doesn’t depend on other work. In a flat in Erith, 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.
Doing several joints on one visit is usually more efficient than separate visits. You’ll get one clear quote for the whole job.
Why choose Mr Mastic in Erith
- Homes, businesses and hotels
- 180+ five-star Google reviews
- Neat joints and a tidy finish
- ARBOMaster approved applicator
Take a look at what affects the cost or our reviews.
Commercial buildings in Erith
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 work to the specification you’re given, installing the product to its tested details. Many London buildings have tight access and loading restrictions, and out-of-hours working is possible to arrange.
Erith is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you look after a building such as Christ Church (Erith) CofE Primary School, gaps opened by contractors for new cabling are a common finding in schools and offices.
Erith is about 3 miles north-west of Dartford, in Greater London. Wherever you are in the DA8 postcode area, our applicators can take on fire rated sealant. Across Greater London, we cover 764 places, and Erith is one of them. You can also see our page for London, roughly 11 miles from Erith.
Every address in DA8, DA17 and DA7 is within our area for fire rated sealant, from the main roads to the quietest streets. If you need fire rated sealant at a property on Church Road, Town Square and Erith High Street or a nearby road, our applicators can take on the job. Close by, we work in Northumberland Heath (1 mile south), Bexley Riverside (1 mile south), Belvedere (1 mile north-west), Lessness Heath (1 mile north-west) and Barnehurst (1 mile south). Larger places within reach include London (11 miles west), City of Westminster (14 miles west), Marylebone (14 miles west), St Pancras (13 miles west), Shoreditch (11 miles west) and Walthamstow (11 miles north-west).
Near you in Erith
Around Erith, our work takes us to homes and buildings near Trinity School, The Cross Keys pub and Erith School and the streets around them. There’s a railway station in Erith itself: Erith station. Well-known places in the area include Erith Museum (within half a mile east) and Erith and District Hospital (under half a mile south-west). The countryside around Erith includes Crossness Nature Reserve.
Surface by surface
Linear gaps
Some linear gaps have to cope with movement as well as fire. We choose a product and depth that suit the gap and the movement, following the tested detail.
Flats and HMOs
Converted houses often have gaps around old and new services. The gaps on your list are sealed with a fire-rated product and the locations noted.
Nearby places to Erith
What else we do in Erith
Landlord and commercial work in Erith
Letting agents and landlords in Erith can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
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 that we can handle for you.
What affects the quote in Erith
Your quote is based on your job. We look at:
- How many areas need sealing
- Which sealant suits the joint
- Mould in or behind the old joints
- Access and height
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- The address or postcode of the job
- The problem you’ve noticed
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Erith: your questions answered
Can parking be tricky for a visit in Erith?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Is Erith in your area for fire rated sealant?
Yes. We work across London and the South East, and Erith is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
Can you quote for more than one area?
Yes. More than one area can be quoted together.
Do you hold any approvals?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Do you carry out fire risk assessments?
No. We work from the specification you give us and install to the manufacturer’s details.
How long does fire rated sealant take?
It depends on the size of the job, but as a guide it takes from a few hours to a few days, depending on the number of gaps and the access. We will give you a better idea when we quote.
What does intumescent mean?
Intumescent describes a material that swells in heat. Intumescent sealants are a type of fire-rated sealant and which one is used depends on the job.
Is the work guaranteed?
Yes, always. There’s a 12-month guarantee on every job, large or small.