Oxfordshire · England
Lewknor Fire Rated Sealant
Fire rated sealant for Lewknor and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Gaps flagged on a fire risk assessment
- Linear gaps at the head of walls
- Damaged fire sealant left by other trades
Why deal with it now?
Waiting for the next refit can leave a gap open for years. On its own, sealing it now is a small job and needn’t wait for anything else. Where a wall is exposed, as many are in small places like Lewknor, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Why choose Mr Mastic in Lewknor
- We never seal over old sealant
- Experience in homes, commercial sites and hotels
- Quality sealants from Arbo and Everbuild
- We are fully insured
See how sealant jobs are priced and our reviews.
Fire rated sealant in Lewknor, done properly
Door frame gaps, linear joints and holes around services all have their own details. We check the size and the substrate before choosing the product, then apply it to the depth its tested detail calls for. If you’re dealing with gaps where walls meet ceilings or slabs and open gaps behind door architraves, we can put it right, whatever the surface.
If you have holiday lets, a converted barn used for business or a community building near Lewknor, the washrooms, kitchens and any fire-rated joints need the same care as a big site.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Place
- Lewknor (OX49)
- Region
- Oxfordshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Commercial buildings in Lewknor
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, 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.
Schools such as Lewknor Church of England Primary School are buildings too, and gaps opened by contractors for new cabling are a common finding in schools and offices.
Lewknor is about 5 miles south of Thame, in Oxfordshire. Jobs in Lewknor get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Lewknor is one of 443 towns and villages in Oxfordshire where we work for fire rated sealant. Our Oxford page covers work nearby (12 miles or so).
We work across the OX49 postcode area for fire rated sealant and the streets around it. We cover properties on High Street, Weston Road and Lewknor Close and the roads around them. If you’re just outside Lewknor, we cover South Weston (1 mile north-west), Aston Rowant (1 mile north-east), Postcombe (1 mile north), Shirburn (1 mile south-west) and Kingston Blount (2 miles north-east). Larger places within reach include Oxford (12 miles north-west), Didcot (13 miles west), Abingdon-on-Thames (13 miles west), Thame (5 miles north), Henley-on-Thames (10 miles south) and Benson (7 miles south-west).
What’s near Lewknor
Locally, jobs take us to homes and businesses close to Ye Olde Leathern Bottle Public House and Icknield Community College. Nearby you will also find Thame Community Hospital (5 miles north). The countryside around Lewknor includes Aston Rowant NNR and Bald Hill.
Different surfaces, different methods
Plasterboard walls
Service holes in plasterboard are often rough and oversized. Gaps that are too big for sealant alone need a different detail.
Service penetrations
A copper pipe, a cable and a plastic pipe can all need different fire-stopping details. We follow the manufacturer’s tested detail for each.
Towns and villages near Lewknor
Other services in Lewknor
Lewknor: your questions answered
Is Lewknor in your area for fire rated sealant?
Yes, Lewknor is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear price.
Do you cover smaller places like Lewknor?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we’re done.
I’m a tenant. Can you help?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
What’s the difference between intumescent and fire-rated sealant?
Intumescent means it swells when heated, helping close the gap. It’s one type of fire-rated sealant; which product suits depends on the gap, the substrate and the service.
How long will you be here?
It depends on the size of the job, but most jobs take from a few hours to a few days, depending on the number of gaps and the access. We’ll tell you when we quote.
Is there a guarantee?
Yes. All our work carries a 12-month guarantee.
Can ordinary silicone be used in a fire-stopping gap?
No. Where a fire-rated seal is needed, it has to be a product tested for that use fitted to the maker’s details.
Landlords, agents and businesses in Lewknor
If you manage several properties in or around Lewknor, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and photos by email help.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
What we can’t put right
New sealant can’t fix everything, and we’ll tell you before any work starts. Sealant won’t put right:
- A wall that is not a fire-resisting element to begin with
- Deciding what fire stopping a building needs
- Certifying a building or signing off its fire safety
If you’re not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Flats & HMOs
- Linear gaps
- Door frames
- Service penetrations
- Plasterboard & masonry
- Pipe & cable gaps
What happens on the day
The work is kept neat and contained to the joints we’re treating, so you can get on with your day. Expect the work to take from a few hours to a few days, depending on the number of gaps and the access, and we tell you how long to leave it before we go. For a village or hamlet like Lewknor, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We plan the order of work and access, floor by floor or flat by flat.
- We take out any damaged or unsuitable sealant.
- Gaps are cleaned of dust and loose material.
- The fire-rated or intumescent sealant is applied and tooled to the tested detail.
- We record what was done and flag anything that needs a different system.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Try not to wet indoor joints just before the visit
- Tell us about any previous sealing or DIY attempts
How to get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
Advice
What affects the cost of fire rated sealant
We quote each job individually. This is what makes a difference:
- Any mould that needs treating
- How much there is to do
- Whether the work is at height
- When we can work, for business premises
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Whether it’s a home or a business
- Whether it has been sealed before
- Where the job is, and your postcode
- Any access issues, like height or stairs
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, call 0345 464 0079 or send us an email.
What we are called out for in Lewknor
In some buildings the gap was filled with the wrong thing in the first place: ordinary expanding foam, standard silicone or decorators’ caulk where a fire-rated seal was needed. It looks sealed, but it isn’t fire-rated.
Signs it’s time to call us include:
- Open gaps behind door architraves
- Unsealed gaps where pipes and cables go through a wall
- Old fire sealant that has split or come away
- Seals cut through by electricians, plumbers or data installers
If you look after a church, hall or community building such as Church of St Margaret, older buildings that have had new heating or wiring often have service gaps worth checking.
Questions to ask before booking
- How hidden problems are handled
- Whether you can choose the colour
- Whether they seal over old material or remove it
- How the joint is cleaned and prepared