Kent · England
Otford Fire Rated Sealant
Specialist fire rated sealant for Otford: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Open gaps behind door architraves
- Open joints along the top of partitions
- Sealant items on a fire risk assessment action list
Workplaces and buildings in Otford
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.
For buildings such as Church of St Bartholomew, older buildings that have had new heating or wiring often have service gaps worth checking. Managing a site like Otford Primary School? Then gaps opened by contractors for new cabling are a common finding in schools and offices. Letting a property close to Otford station? Then new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
Otford is about 2 miles north of Sevenoaks, in Kent. From the centre of Otford to the outskirts, we cover fire rated sealant for every kind of property, from flats and houses to offices and hotels. Our Kent coverage runs to 922 places, Otford among them. We also work in London, around 18 miles away.
Work in TN14 works the same way as everywhere else we cover. Whether your property is on Station Road, High Street and Bubblestone Road or anywhere close by, we can help. Neighbouring places we cover for fire rated sealant include Twitton (1 mile west), Shoreham (2 miles north), Sepham Heath (2 miles north-west), Halstead (3 miles north-west) and Badgers Mount (3 miles north-west). We also work in nearby towns such as Maidstone (15 miles east), Dartford (9 miles north), Royal Tunbridge Wells (13 miles south), Gravesend (12 miles north-east), Tonbridge (9 miles south-east) and Northfleet (11 miles north-east).
Landmarks near Otford
In Otford, that means homes and buildings near Knole Academy, The Woodman pub and Fackenden Down and the streets around them. There’s a railway station in Otford itself: Otford station. Other landmarks nearby include Kemsing Castle Bank (1.7 miles east) and Otford Heritage Centre (less than half a mile south-east). For a walk, there’s Dryhill Nature Reserve.
Fire rated sealant in Otford, done properly
In flats, HMOs, offices and schools, fire stopping is often disturbed by later work. One new cable or pipe can leave a gap that nobody goes back to seal. We seal them with a product tested for that kind of gap. We work on door frames, plasterboard & masonry and flats & HMOs, and common reasons people get in touch are ordinary sealant used where a fire-rated product was needed and damaged fire sealant left by other trades.
In a smaller place like Otford, commercial jobs tend to be smaller buildings: a pub, a surgery, a school, a shop or a few business units. Each needs the same care with its sealant as any larger building.
There’s a 12-month guarantee on every job, whatever its size.
- Place
- Otford (TN14)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Otford questions
Do you cover Otford for fire rated sealant?
Yes, Otford is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we will give you a clear quote.
Do you cover smaller places like Otford?
Yes, we do. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you certify the fire stopping?
We don’t issue ratings or certificates ourselves. What’s required is set by your assessor or designer, and the product’s tested details show what it achieves.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Otford.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
How long will you be here?
Most jobs take from a few hours to a few days, depending on the number of gaps and the access. Your quote will say how long we expect yours to take.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
What does intumescent mean?
Intumescent describes a material that swells in heat. Many fire-rated sealants work this way, but not all.
What affects the cost of fire rated sealant
For a quick quote, just ask. What matters most is:
- How many rooms, windows or areas are involved
- How much old sealant there is and how hard it is to remove
- Whether the work is at height
- The number and length of the joints
Doing several joints on one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Helping us quote
There’s no need for technical detail. Just tell us:
- The type of property
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it has been sealed before
- Where the job is, and your postcode
We do not publish a price list. Instead, we give you a clear price for your job. To get started, ring 0345 464 0079 or drop us an email.
Should I try it myself first?
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.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What the job involves on each surface
Plasterboard walls
Many fire-resisting walls in flats, offices and conversions are plasterboard. We use a product tested in that kind of wall for the gap we are sealing.
Masonry and concrete
Core-drilled and broken-out holes in concrete are often irregular. We measure the gap at its widest point against the product’s tested range.
How the visit works
The work is kept neat and contained to the joints we’re treating, so you can get on with your day. The job normally takes a few hours for a handful of gaps, and longer for a whole building, and we explain the cure time before we leave. A visit to Otford is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We go through the gaps on your list or survey and check each one’s size and substrate.
- We remove any old or unsuitable filler and clean the gap.
- Where the tested detail needs backing or fill, we fit 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.
Before we arrive
- On commercial sites, let us know about site rules
- Let us know if you’ve seen damp or leaks
- Move anything stored near the joints
How to get a quote
Call for a quick quote, 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.
Advice
Why act early in Otford
An unsealed gap lets smoke and fire get round a wall that was built to hold them back. A proper seal lets the wall do its job again, and the work involved is often modest. In a smaller place like Otford, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re not sure whether it needs doing, call 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Why Otford clients choose us
- Domestic, commercial and hotel work
- 180+ five-star Google reviews
- Anti-fungal silicone where joints get wet
- One-year guarantee on every job
Take a look at what affects the cost or our reviews.
For landlords and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Store the list of sealed gaps with your building paperwork
- Do not fill fire-stopping gaps with ordinary foam or silicone
- Check risers, ceiling voids and cupboards during building checks
- Allow for resealing whenever new services are run
Follow the cure time we give you before decorating over the sealant. Not every fire-rated sealant takes paint.
A gap left open in a fire-resisting wall or floor lets smoke spread in ways the building wasn’t designed for. Sealing it early is a simple step to take.