West Sussex · England
Fire-rated sealant in High Cross, West Sussex
Fire rated sealant across High Cross and nearby, with old sealant always removed completely and a 12-month guarantee.
- Cracked or shrunken fire-rated sealant
- Standard silicone or caulk in a fire-stopping gap
- Seals cut through by electricians, plumbers or data installers
How we handle fire rated sealant in High Cross
Fire stopping only performs as intended if it’s done to the detail: correct depth, correct backing and a product suited to the surfaces. That’s the part we focus on, one gap at a time. We work on pipe & cable gaps, flats & HMOs and linear gaps, and the jobs we see most are unsealed gaps where pipes and cables go through a wall and holes left by a change of layout.
For a small place like High Cross, the journey and timings are agreed in advance, so the job can fit around bookings, guests or opening times where possible.
All our work is covered by our 12-month guarantee, wherever you are in West Sussex.
- Place
- High Cross (BN6)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
What we are called out for in High Cross
Gaps around door frames are easily missed. The architrave hides the gap between frame and wall, so it’s easy to leave unsealed when doors are changed.
If you can see any of these, it’s time to have the joints looked at:
- Sealant items on a fire risk assessment action list
- Cracked or shrunken fire-rated sealant
- Seals cut through by electricians, plumbers or data installers
- Ordinary sealant used where a fire-rated product was needed
Managing a site like Albourne CofE Primary School? Then gaps opened by contractors for new cabling are a common finding in schools and offices.
What your quote should include
- Are they insured?
- Which colour the sealant will be
- The length of the guarantee
- Which sealant they’ll use, and why
What affects the cost of fire rated sealant
The quote reflects the job in front of us. We take into account:
- How many areas need sealing
- Whether there’s mould to deal with
- The number and length of the joints
- Whether old sealant or filler has to be cut out
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before any work starts, so you know where you stand.
What we need to know
There’s no need for technical detail. Just tell us:
- Pictures of the joints, sent by email
- Where the property is
- Any previous sealing or DIY work
- What the problem is, such as mould, gaps, leaks or cracking
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will talk you through the work.
Fire rated sealant around High Cross
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.
If you look after a church, hall or community building such as The Parish Church of St Bartholomew, gaps around pipes and cables are worth checking after any building work there. For landlords with property near Hassocks station, any gap left by new services in shared walls should be closed with a fire-rated product.
High Cross is about 4 miles west of Burgess Hill, in West Sussex. From the centre of High Cross to the outskirts, fire rated sealant is available for homes and businesses alike, from flats and houses to offices and hotels. Our West Sussex coverage runs to 371 places, High Cross among them. There’s also a page for Brighton, roughly 9 miles from High Cross.
Our applicators cover all of the BN6 postcode area for fire rated sealant. If you’re just outside High Cross, we cover Albourne (1 mile south-east), Albourne Green (1 mile south-east), Albourne Street (1 mile south-east), Blackstone (1 mile south-west) and Twineham (2 miles north). We also work in nearby towns such as Crawley (12 miles north), Horsham (10 miles north-west), Worthing (11 miles south-west), Haywards Heath (7 miles north-east), Burgess Hill (4 miles east) and Shoreham-by-Sea (8 miles south).
Local landmarks in High Cross
The closest station to High Cross is Hassocks station, roughly 3.4 miles east. Other landmarks nearby include The Dene Hospital (2.9 miles north-east) and Clayton Castle (3.9 miles south-east). Open spaces near High Cross include Wolstonbury Hill and Woods Mill.
What sealant work can’t fix
In fairness, there are a few things sealant won’t fix:
- Doors that aren’t fire doors in the first place
- Fire risk assessments, which need a qualified assessor
- Openings too large for sealant, which need batts, boards or another system
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
What we seal
- Plasterboard & masonry
- Service penetrations
- Pipe & cable gaps
- Flats & HMOs
- Linear gaps
- Door frames
High Cross questions
Can you help a landlord with a rental near Hassocks station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can be quoted together. Just ring 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear quote.
Is High Cross in your area for fire rated sealant?
Yes. We work across London and the South East, and High Cross is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing, and we will give you a clear quote.
Do you certify the fire stopping?
Ratings and certificates are not something we issue. What’s required is set by your assessor or designer, and the product’s tested details show what it achieves.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Will you leave a mess?
Tidy work is part of the job. Nearby surfaces are protected.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Can you fill the gap behind a fire door frame?
Yes, where the gap suits a sealant detail. Our work is the gap around the frame and we will tell you if we spot problems with the door.
Do you take on fire stopping in schools and offices?
Yes. Occupied flats, HMOs, offices and schools are all fine and we plan access around the people using them. Early starts or out-of-hours work can be arranged where it’s needed.
Nearby places to High Cross
Also in High Cross
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. Where a wall is exposed, as many are in small places like High Cross, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Some things make a job bigger or smaller: 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.
Why choose Mr Mastic in High Cross
- One-year guarantee on every job
- Anti-fungal sanitary silicone in wet areas
- Rated 4.9 stars on Google
- We never seal over old sealant
See our cost guide or customer reviews.
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Flag any open gap you spot round a pipe or cable
- Include hidden areas like risers in routine checks
- Tell trades working in the building that fire seals must be put back
- Take photos of fire stopping before ceilings or boxing go back
File the record of locations and products with your fire safety paperwork. It saves time at the next inspection or assessment.
Leave a fire-stopping gap open and smoke can move through the building much more easily. Closing it is usually a straightforward job.
What we do, step by step
A visit follows a simple pattern: we check the joints, protect the area around them, carry out the job and tidy away. Most jobs take from a few hours to a few days, depending on the number of gaps and the access. Somewhere as small as High Cross, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- The specified fire-rated sealant goes in over any backing its detail requires.
- We hand over a list of locations and products for your files.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Clear the area around the work
- On commercial sites, let us know about site rules
Get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.