West Sussex · England
Fire Rated Sealant in Henfield
Fire-stopping gaps in Henfield need attention? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Gaps flagged on a fire risk assessment
- Standard silicone or caulk in a fire-stopping gap
- Gaps where walls meet ceilings or slabs
Common problems we fix in Henfield
Much fire stopping is hidden: in ceiling voids, service risers and behind boxing. Out of view, damage sits unnoticed until someone inspects.
Signs it’s time to call us include:
- Sealant items on a fire risk assessment action list
- Fire seals that have cracked with movement
- Gaps filled with a product that is not fire-rated
- Linear gaps at the head of walls
Community buildings like St Peter's Church are part of the picture too: older buildings that have had new heating or wiring often have service gaps worth checking.
Before you book anyone
- How hidden problems are handled
- Whether VAT is included
- Who turns up on the day
- How long the guarantee is
How we handle fire rated sealant in Henfield
Until it’s heated, intumescent sealant behaves like an ordinary sealant; 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, so we follow the tested detail for each one. We work on flats & HMOs, linear gaps and door frames, and people most often call us about new service routes left unsealed after building work and unsealed gaps where pipes and cables go through a wall.
In a smaller place like Henfield, commercial jobs tend to be smaller buildings: a pub, a surgery, a school, a shop or a few business units. The work is the same as in a big building, just on a smaller scale.
All of our work is guaranteed for twelve months, in Henfield and everywhere else we cover.
- Where
- Henfield (BN5)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Flag any open gap you spot round a pipe or cable
- Ask which product was used before you paint
- Tell trades working in the building that fire seals must be put back
- Don’t fill fire-stopping gaps with ordinary foam or silicone
Follow the cure time we give you before decorating over the sealant. Not every fire-rated sealant takes paint.
Small gaps around services are simple to deal with while there are only a few. Over time, more work adds more holes.
What sealant work cannot fix
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Doors that are not fire doors in the first place
- Large holes that need a different fire-stopping system
- Construction that doesn’t provide fire resistance on its own
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before you book.
Joints and surfaces we work on
- Plasterboard & masonry
- Service penetrations
- Pipe & cable gaps
- Linear gaps
- Door frames
- Flats & HMOs
Questions from Henfield
Do you cover Henfield for fire rated sealant?
Yes, Henfield is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear quote.
Do you take on hotel work around Henfield?
Yes, hotels and guest houses are among the places we work. Rooms can be done a few at a time, so the building stays open.
What fire rating will the seal have?
Ratings and certificates aren’t something we issue. The performance comes from the product’s tested details and the specification from your assessor or designer; we install to those details and record what we did.
Do you offer different sealant colours?
We help you choose a colour that suits, from white and clear to greys and other shades. The choice depends on the product the joint needs.
How long does fire rated sealant take?
That depends on the amount of work, but most jobs take from a few hours to a few days, depending on the number of gaps and the access. We will tell you when we quote.
Do you have insurance?
Yes. We’re fully insured, and we can confirm the details when we quote.
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.
Do you provide details of the products used?
Yes. You get a list of where we worked and what we used to keep with your fire safety documents.
The process
On the day, we look over the joints with you first, so you know exactly what we’re doing. Surfaces next to the work are protected before we start. Most jobs take from a few hours to a few days, depending on the number of gaps and the access. A visit to Henfield 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.
- Each gap is measured and its substrate and service noted.
- 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.
- Every location is recorded with the product used.
How to prepare
- Keep pets and children clear of the area while we work
- Tell us if parking is tricky
- Try not to wet indoor joints just before the visit
Getting a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you’re ready, ring 0345 464 0079 or drop us an email.
Advice
Places near Henfield
More services for Henfield
What the job involves on each surface
Plasterboard walls
Plasterboard partitions are common in flats, offices and conversions. The sealant has to be one tested in plasterboard.
Service penetrations
Service penetrations are where new gaps often appear. Old or unsuitable filler comes out before the right sealant goes in.
Commercial buildings in Henfield
Henfield has hotels and guest accommodation in and around it. For hotels, a room-by-room programme keeps most rooms in use while the work goes on. 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 apply fire-rated sealant to the assessor’s or designer’s specification and the product’s tested details.
For site and facilities teams at buildings such as St Peter's CofE Primary School, service openings in fire-resisting walls need checking after any refurbishment.
Henfield is about 7 miles north of Shoreham-by-Sea, in West Sussex. Henfield gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Henfield is one of 371 places in West Sussex we cover for fire rated sealant. There’s also a page for Brighton, roughly 9 miles from Henfield.
Every address in BN5 is within our area for fire rated sealant, from the main roads to the quietest streets. You’ll find streets such as Upper Station Road, High Street and Lower Station Road, and we cover them all. Close by, we work in Woodmancote (2 miles south-east), Blackstone (2 miles east), Small Dole (2 miles south), Shermanbury (2 miles north) and High Cross (3 miles east). We also work in nearby towns such as Crawley (13 miles north), Horsham (9 miles north), Worthing (9 miles south-west), Haywards Heath (9 miles north-east), Burgess Hill (7 miles east) and Littlehampton (14 miles south-west).
Near you in Henfield
Around Henfield, our work takes us to homes and buildings near The Bell Inn and the streets around them. Other landmarks nearby include The Dene Hospital (5.4 miles north-east) and Steyning Museum (3.7 miles south-west). The countryside around Henfield includes Woods Mill and Truleigh Hill.
Why act early in Henfield
Sealant is not the fix for every opening. 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. In an older home around Henfield, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we will go through it with you.
Why choose Mr Mastic in Henfield
- Over 20 years’ experience
- Rated 4.9 stars on Google
- Arbo and Everbuild products
- One-year guarantee on every job
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.