Kent · England
Kemsing Fire Rated Sealant
Our applicators work in Kemsing on intumescent and fire-rated sealant around gaps, frames and service penetrations. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Open holes round services passing through fire walls
- Seals cut through by electricians, plumbers or data installers
- Joints picked up in a fire-stopping survey
Honest limits
In fairness, there are a few things sealant will not fix:
- Doors that are not fire doors in the first place
- Big openings where sealant alone isn’t the tested solution
- Sign-off of the building, which sits with building control or your assessor
If you’re 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
- Flats & HMOs
- Plasterboard & masonry
- Pipe & cable gaps
- Service penetrations
- Door frames
- Linear gaps
Fire rated sealant in Kemsing, done properly
Intumescent sealant looks much like any other sealant until it gets hot; in a fire it expands into the joint. Which product suits a gap depends on its width, the materials either side and what runs through it. We’re often asked to deal with gaps flagged on a fire risk assessment and ordinary sealant used where a fire-rated product was needed, across flats & HMOs, linear gaps and service penetrations.
If you run a pub, café, guest house or shop in or near Kemsing, its washrooms and kitchen need the same sealant care as any big building.
We stand behind the work with a 12-month guarantee.
- Where
- Kemsing (TN15)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Kemsing: your questions answered
Is Kemsing within the area you cover?
Yes. Kemsing is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
I let a flat near Otford station. Can you help?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
What do you put in the joint?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We will tell you what we are using and why.
Will you leave a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
What fire rating will the seal have?
We don’t issue ratings or certificates ourselves. The performance comes from the product’s tested details and the specification from your assessor or designer.
Can you quote for more than one area?
Yes. Just list everything you need.
How long does the job take?
Most jobs take a few hours for a handful of gaps, and longer for a whole building, including preparation and clearing up. Your quote will say how long we expect yours to take.
Is intumescent sealant the same as fire-rated sealant?
Intumescent describes a material that swells in heat. Many fire-rated sealants work this way, but not all, and the choice depends on the gap.
The process
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes anything from a few hours to several days, depending on how many gaps there are, depending on the amount of work. A visit to Kemsing is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Access to each area is agreed so the work can run in order.
- We take out any damaged or unsuitable sealant.
- Dust and loose debris are cleaned from each gap.
- We apply and tool the sealant to the product’s tested detail.
- Locations and products are written up and any gaps unsuitable for sealant are flagged.
Getting ready for the visit
- Mention any parking rules near the property
- For indoor joints, keep the area dry beforehand if you can
- Let us know about earlier repairs to the joints
How to get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, phone 0345 464 0079 or send us an email.
Advice
Why it’s worth doing now in Kemsing
Fire-rated sealants need more care than everyday sealant. Depth, backing and surface preparation all affect how a seal performs, so we follow the maker’s details on every gap. In an older home around Kemsing, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
The cost depends on the amount of work, how much old material has to come out and access to the work. We give a clear quote before work begins, so you know where you stand.
Why choose Mr Mastic in Kemsing
- Sanitary silicone with an anti-fungal additive in wet areas
- Domestic, commercial and hotel work
- Fully insured
- Any old sealant cut out fully, not covered over
Take a look at how sealant jobs are priced or customer reviews.
Workplaces and buildings in Kemsing
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 are given, installing the product to its tested details.
Managing a site like Kemsing Primary School? Then fire-stopping around service openings should be restored whenever new services go in. Letting a property close to Otford station? Then fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through. If you look after a church, hall or community building such as Church of St Mary, older buildings that have had new heating or wiring often have service gaps worth checking.
Kemsing is about 2 miles north-east of Sevenoaks, in Kent. Whether you are in the middle of Kemsing or further out, fire rated sealant is available for homes and businesses alike. Kemsing is one of 922 towns and villages in Kent we cover. Our London page covers work nearby (19 miles or so).
Every address in TN15 is covered for fire rated sealant. Fire rated sealant is available to properties on High Street, Copperfields Walk and Childsbridge Lane and the roads around them. We also cover the places around Kemsing: Cotman's Ash (1 mile north-east), Heaverham (2 miles east), Woodlands (2 miles north-east), Romney Street (2 miles north) and Knatts Valley (2 miles north-east). Further out, we also cover Maidstone (14 miles east), Dartford (9 miles north), Royal Tunbridge Wells (12 miles south), Gravesend (11 miles north-east), Tonbridge (8 miles south) and Northfleet (10 miles north-east).
Around Kemsing
Locally, jobs take us to homes and businesses close to St Michael's Preparatory School, Knole Academy and Kemsing Down. Kemsing’s nearest station is Otford station, about 1 mile north-west of the centre. Nearby you will also find Kemsing Castle Bank (0.5 miles east) and Otford Heritage Centre (1 mile west). Green spaces nearby include Dryhill Nature Reserve.
Towns and villages near Kemsing
Also in Kemsing
Keeping the joints in good condition
So the new joints stay in good condition:
- Plan fire stopping into any work that goes through walls or floors
- Store the list of sealed gaps with your building paperwork
- Ask every contractor to reseal any fire stopping they disturb
- Check risers, ceiling voids and cupboards during building checks
Do not drill through or remove a fire seal without putting it back properly. New services through a sealed wall should include fire stopping in the plan.
A flagged gap shouldn’t wait for the next assessment. Get it sealed and recorded so you can show it was dealt with.
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
If you manage several properties in or around Kemsing, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
How we quote for fire rated sealant
The quote reflects the job in front of us. We look at:
- The size of the job
- Which sealant suits the joint
- Mould in or behind the old joints
- When we can work, for business premises
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
To make quoting easier, please include:
- The type of property
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
- Where the job is, and your postcode
Want a quote for fire rated sealant? Please call 0345 464 0079 or drop us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.