Brighton and Hove · England
Fire-rated sealant in Withdean, Brighton and Hove
Fire rated sealant for Withdean and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Gaps around pipes and cables through fire-resisting walls
- Open gaps behind door architraves
- Holes left by a change of layout
What we are called out for in Withdean
Sometimes the wrong product was used from the start: general-purpose foam, everyday silicone or caulk where a fire-rated seal was needed. It looks sealed, but it is not fire-rated.
Signs it’s time to call us include:
- Ordinary sealant used where a fire-rated product was needed
- Open joints along the top of partitions
- Open holes round services passing through fire walls
- Gaps left after a refit or conversion
If you look after a church, hall or community building such as St John the Evangelist's Church, service openings in its walls need the right fire-rated sealant, as in any building.
Questions to ask before booking
- How the colour is chosen
- What preparation is included
- How long the guarantee is
- Is VAT in the price?
Fire rated sealant in Withdean
We do not assess buildings or decide what fire stopping is needed; your assessor, designer or building control sets that out. Our part is applying the specified sealant carefully, to the right depth and with the right backing. Common call-outs are for open joints along the top of partitions and cracked or shrunken fire-rated sealant, across linear gaps, service penetrations and plasterboard & masonry.
Around a place like Withdean, halls, schools and small businesses all have washrooms and kitchens used by many people. Sealant and fire-rated joints there matter as much as in any larger building.
Big or small, it’s backed by our 12-month guarantee in Withdean and across Brighton and Hove.
- Location
- Withdean (BN1, BN3)
- Wider area
- Brighton and Hove
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
DIY sealant or a professional job?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
When it is not the sealant
Sealant isn’t the answer to every problem, and we will tell you before we start. It will not solve:
- Issuing a fire rating or certificate for a building
- Assessing a building’s fire safety
- Openings too large for sealant, which need batts, boards or another system
If you’re not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
Where we work in Withdean
- Pipe & cable gaps
- Flats & HMOs
- Door frames
- Linear gaps
- Service penetrations
- Plasterboard & masonry
What we do, step by step
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. It generally takes from a few hours to a few days, depending on the number of gaps and the access. A visit to Withdean 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.
- We begin by agreeing the list of gaps from your assessor’s or designer’s requirements.
- 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 for your records.
Before we arrive
- Mention any tricky access
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
Ask for a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Read more
Questions from Withdean
Can you help a landlord with a rental near Preston Park station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Will you come out to Withdean?
Yes. Withdean 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.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
How long does the job take?
Typically it takes anything from a few hours to several days, depending on how many gaps there are. Bigger jobs take longer, and we will tell you how long to expect.
Where is Mr Mastic based?
We’re a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Do I need to be at home?
If the work is inside, we need someone to let us in. Once we have agreed the job, you do not need to watch us work.
Do you take on fire stopping in schools and offices?
Yes, whether the building is a school, an office, flats or an HMO, and whether it’s in use or not. Tell us how the building is used and we will plan around it.
What’s the difference between intumescent and fire-rated sealant?
Intumescent describes a material that swells in heat. Many fire-rated sealants work this way, but not all.
What the job involves on each surface
Linear gaps
Linear gaps run along the head of walls, at floor edges and between panels. We seal them to the tested detail, with backing where it’s needed.
Masonry and concrete
Holes through concrete and block are rarely neat. We check the gap size around the service against the product’s tested range.
Landlord and commercial work in Withdean
For anyone letting property in or around Withdean, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
Housing providers, facilities teams and property managers book us too in Withdean and across Brighton and Hove. We can quote a run of properties together, and we are fully insured.
Why deal with it now?
Sealant isn’t the fix for every opening. Large holes, cable bundles and plastic pipes can call for batts, collars or wraps. We’ll say so if a gap needs something other than sealant. Around Withdean, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
Leaving a failed joint generally makes the job bigger, not smaller. If you are not sure whether it needs doing, phone 0345 464 0079 or email us and we will give you an honest view and a quote.
Why choose Mr Mastic in Withdean
- Any old sealant cut out fully, not covered over
- Homes, businesses and hotels
- We’re fully insured
- Arbo and Everbuild products
Read what affects the cost or what customers say.
Fire rated sealant in Withdean: local notes
For seaside hotels, guest houses and holiday lets around Withdean, heavy use in the busy months is hard on washroom and kitchen sealant, and any building work there should leave fire-rated joints made good. Withdean has hotels and guest accommodation in and around it. Hotel work can be planned room by room, with out-of-hours working where needed.
For landlords with property near Preston Park station, any gap left by new services in shared walls should be closed with a fire-rated product. Schools such as St Bernadette's Catholic Primary School are buildings too, and service openings in fire-resisting walls need checking after any refurbishment.
Withdean is about 2 miles north-west of Brighton, in Brighton and Hove. Whether you are in the middle of Withdean or further out, fire rated sealant is available for homes and businesses alike. Our area takes in 30 places across Brighton and Hove.
We work across the BN1 and BN3 postcode area for fire rated sealant. That includes homes and businesses on Home Road, Croft Road and Bates Road. Withdean sits on or near the A23. Other places close to Withdean include Preston (1 mile south), Westdene (1 mile north-west), Prestonville (1 mile south), Patcham (1 mile north) and Hollingdean (1 mile south-east). Within a short drive, we also cover Kemptown (3 miles south-east), Whitehawk (3 miles south-east), Saltdean (6 miles south-east), East Saltdean (6 miles south-east), Roedean (3 miles south-east) and Rottingdean (5 miles south-east).
Local landmarks in Withdean
In Withdean, that means homes and buildings near Dorothy Stringer High School, Varndean College and Withdean Park. Withdean has its own railway station: Preston Park station. Nearby you’ll also find Churchill Square (1.9 miles south) and Brighton Transport Museum (0.8 miles south). Not far away are Newmarket Hill and Ladies Mile.