West Sussex · England
Fire-rated sealant in Duncton, West Sussex
Problem with your fire-stopping gaps in Duncton? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Ordinary sealant used where a fire-rated product was needed
- Fire seals that have cracked with movement
- Damaged fire sealant left by other trades
Different surfaces, different methods
Flats and HMOs
Working in occupied flats needs some planning. Access to flats and common areas is agreed in advance to keep disruption down.
Masonry and concrete
Preparation counts on brick, block and concrete. The gap is cleaned and backed where required.
How we handle fire rated sealant in Duncton
Filling a fire-stopping gap with standard silicone or caulk does not make it fire-rated. Anything unsuitable comes out first and the gap is resealed with a product tested for that use. If you have cracked or shrunken fire-rated sealant and door frames with gaps between frame and wall, we can help, whatever the surface.
For holiday lets, converted business premises or a community building near Duncton, the washrooms, kitchens and any fire-rated joints need the same care as a big site.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- Duncton (GU28)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
The work is kept neat and contained to the area we are working on, so you can carry on as normal. The job usually takes from a few hours to a few days, depending on the number of gaps and the access, and we explain the cure time before we leave. In a small place like Duncton, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We go through the gaps on your list or survey and check each one’s size and substrate.
- Old or unsuitable sealant is cut out and the gap cleaned.
- Backing or fill is fitted where the product’s tested detail calls for it.
- The sealant goes in to the depth its detail sets, then it’s tooled off.
- Locations and products are noted so you have them on file.
How to prepare
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
- Clear the area around the work
How to get a quote
To get a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before any work starts.
Related advice
Workplaces and buildings in Duncton
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 work to the specification you are given, installing the product to its tested details.
Schools such as Duncton CofE Junior School are buildings too, and gaps opened by contractors for new cabling are a common finding in schools and offices.
Duncton is about 10 miles north-east of Chichester, in West Sussex. Across the GU28 area, we can carry out fire rated sealant at your property. 371 places in West Sussex are on our list, large and small. For nearby work, see our Crawley page, about 22 miles away.
Postcode districts we cover here for fire rated sealant: GU28. That includes homes and businesses on Duncton High Street and Willett Close. Close by, we work in East Lavington (1 mile south-west), Sutton (2 miles south-east), Rotherbridge (2 miles north), Graffham (2 miles west) and Haslingbourne (2 miles north-east). Further out, we also cover Worthing (13 miles south-east), Bognor Regis (11 miles south), Chichester (10 miles south-west), Littlehampton (10 miles south-east), Emsworth (15 miles south-west) and Rustington (11 miles south-east).
Near you in Duncton
Around Duncton, our work takes us to homes and buildings near The Parish Church of St Peter and the streets around them. Nearby you will also find Midhurst Community Hospital (5.4 miles north-west) and Coultershaw Heritage Site (1.6 miles north-east). The countryside around Duncton includes Bignor Hill and Graffham Common.
Why it’s worth doing now in Duncton
For some gaps, sealant is not the right answer and another system is needed. Big openings, bundles of cables and plastic pipes may need batts, collars or wraps instead. We’ll say so if a gap needs something other than sealant. Older cottages and farmhouses around Duncton can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on the amount of work, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Why choose Mr Mastic in Duncton
- We leave the area clean and tidy
- Anti-fungal silicone where joints get wet
- ARBOMaster approved applicator
- Over 20 years’ experience
Take a look at our cost guide and customer reviews.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Look in service cupboards and ceiling voids from time to time
- Store the list of sealed gaps with your building paperwork
- Plan fire stopping into any work that goes through walls or floors
- Keep photos of seals that will be hidden
Keep the record we give you with the building’s fire safety documents. It saves time at the next inspection or assessment.
A flagged gap shouldn’t wait for the next assessment. Have it sealed, then keep the record.
Nearby places to Duncton
More services for Duncton
Landlords, agents and businesses in Duncton
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
We also work for property managers and facilities teams. Several sites can go on one quote, and we’re fully insured for the work.
Common problems we fix in Duncton
Door frames are a common weak spot. The gap between the frame and the wall is hidden behind the architrave, so it’s easy to leave unsealed when doors are changed.
Most people get in touch after spotting something like this:
- Cracked or shrunken fire-rated sealant
- Gaps flagged on a fire risk assessment
- Gaps left after a refit or conversion
- Standard silicone or caulk in a fire-stopping gap
Community buildings like Church of Holy Trinity are part of the picture too: gaps around pipes and cables are worth checking after any building work there.
Before you book anyone
- Which colour the sealant will be
- Is the old sealant removed completely?
- How long to leave it before use
- How the surfaces are prepared before sealing
Quotes for fire rated sealant in Duncton
The quote reflects the job in front of us. We take into account:
- Which sealant suits the joint
- The size of the job
- The number of rooms or windows
- Access and height
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- What’s wrong with the joints now
- How we’d reach the joints
- Whether it’s a home or a business
- Any previous sealing or DIY work
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved.
Duncton: your questions answered
Do you cover Duncton for fire rated sealant?
Yes. Our work covers London and the South East, and Duncton is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing.
Do you cover smaller places like Duncton?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Where are you based?
We work from Crawley. We cover Duncton and the rest of West Sussex, along with the rest of our area.
I’m a tenant. Can you help?
Yes, though it’s best to check with your landlord first. Landlords are often happy for the work to be arranged.
Can I choose the sealant colour?
Generally, yes. White, clear and grey are common, and other colours are available for many products, and we agree the colour with you before we start.
Are you insured?
Yes, we’re fully insured for domestic and commercial work.
Is it messy?
No. We protect the surfaces around the joints, and we tidy up before we go.
What sealant do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.