West Sussex · England
Fire Rated Sealant in Rock
Intumescent and fire-rated sealant around gaps, frames and service penetrations in Rock, with a 12-month guarantee on every job. Ask us for a quote.
- Standard silicone or caulk in a fire-stopping gap
- Unsealed gaps around fire door frames
- Unsealed gaps where pipes and cables go through a wall
What we do, step by step
On the day, we look over the joints with you first. We protect the surfaces around the joints before any work begins. Most jobs take from a few hours to a few days, depending on the number of gaps and the access. Somewhere as small as Rock, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we work through your list or survey, measuring each gap and checking what it’s formed in.
- Old or unsuitable sealant is cut out and the gap cleaned.
- We put in whatever backing or fill the product detail specifies.
- We apply the fire-rated or intumescent sealant to the specified depth and tool it.
- Locations and products are noted so you have them on file.
Getting ready for the visit
- Tell us if parking is tricky
- Plan for the work area to be out of bounds to pets and children
- Let us know about stairs, lifts or work at height
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Read more
Fire rated sealant in Rock, done properly
In flats, HMOs, offices and schools, fire stopping is often disturbed by later work. One new cable or pipe can leave a gap that nobody goes back to seal. Those are the gaps we close, using a tested fire-rated product. If you have linear gaps at the head of walls and gaps left after a refit or conversion, we can help, whatever the surface.
In a village or hamlet like Rock, commercial work is more likely to be a pub, a farm shop, holiday lets or a village hall than an office block. Each still needs sound sealant in its washrooms and kitchens, and fire-rated joints where services pass through walls.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Where
- Rock (RH20)
- Region
- West Sussex
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What we’re called out for in Rock
Gaps also open up as buildings move: a seal that cracks or pulls away leaves a path for smoke. Knocks, maintenance and building work damage it further.
These are the problems we are asked about most:
- Gaps filled with a product that isn’t fire-rated
- Gaps flagged on a fire risk assessment
- Open gaps behind door architraves
- Gaps left after a refit or conversion
Schools such as St Mary's CofE Primary School are buildings too, and service openings in fire-resisting walls need checking after any refurbishment.
What to look for in a quote
- How long the guarantee is
- How much experience the applicator has
- Which sealant they’ll use, and why
- Whether they seal over old material or remove it
Leave it or put it right?
Squirting in whichever sealant is nearest doesn’t make a fire seal. Fire-rated products are tested in set gap sizes, depths and substrates, which is why we match the product and the method to each gap. Where a wall is exposed, as many are in small places like Rock, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Leaving a failed joint usually makes the job bigger, not smaller. If you’re not sure whether it needs doing, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why choose Mr Mastic in Rock
- Sanitary silicone with an anti-fungal additive in wet areas
- Quality sealants from Arbo and Everbuild
- 180+ five-star Google reviews
- Over 20 years’ experience
What else we do in Rock
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too in Rock and across West Sussex. We can quote a run of properties together, and we’re fully insured for the work.
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
Different surfaces, different methods
Linear gaps
Linear gaps run along the head of walls, at floor edges and between panels. They’re sealed with a fire-rated sealant over backing where the detail calls for it.
Plasterboard walls
Plasterboard partitions are common in flats, offices and conversions. The sealant has to be one tested in plasterboard for each gap size.
Workplaces and buildings in Rock
Workplaces and the common parts of blocks of flats in England need a fire risk assessment under the Regulatory Reform (Fire Safety) Order 2005, 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.
For buildings such as The Parish Church of St Mary, gaps around pipes and cables are worth checking after any building work there.
Rock is about 6 miles north of Worthing, in West Sussex. If you need fire rated sealant in Rock, please ring 0345 464 0079 or email us for a quick quote. We’re based in Crawley and cover West Sussex, Rock included. Our West Sussex coverage runs to 371 places, Rock among them. For nearby work, see our Brighton page.
Our applicators cover all of the RH20 postcode area for fire rated sealant and the streets around it. If you need fire rated sealant at a property on Old London Road, London Road and Lamorna Close or a nearby road, we can help. Close by, we work in Washington (1 mile south), Heath Common (1 mile north-west), Sullington (1 mile west), Warminghurst (2 miles north) and Storrington (2 miles west). Further out, we also cover Horsham (11 miles north), Worthing (6 miles south), Bognor Regis (15 miles south-west), Haywards Heath (15 miles north-east), Burgess Hill (12 miles east) and Littlehampton (9 miles south-west).
Near you in Rock
Typical jobs here are in homes near Rydon Community College and The Frankland Arms Public House. Nearby you will also find The Storrington And District Museum (1.9 miles west). Green spaces nearby include Chanctonbury Hill.
FAQs for Rock
Do you cover Rock for fire rated sealant?
Yes. We work across London and the South East, and Rock is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Will you come out to Rock?
Yes, Rock is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you have insurance?
Yes. We are fully insured.
Can you work in occupied buildings?
Yes. We work in flats, HMOs, schools, offices and other commercial buildings, including occupied ones. The order of work and access are planned with you.
What does intumescent mean?
Intumescent means it swells when heated. It’s one type of fire-rated sealant; the right one depends on the gap and what passes through it.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Can new sealant go over the old?
No. The old sealant always comes out first.
Do the sealants smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
When it is not the sealant
To be straight with you, there are a few things sealant will not fix:
- Doors that aren’t fire doors in the first place
- Deciding what fire stopping a building needs
- Construction that doesn’t provide fire resistance on its own
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly before you book.
Joints and surfaces we work on
- Linear gaps
- Service penetrations
- Door frames
- Pipe & cable gaps
- Flats & HMOs
- Plasterboard & masonry
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
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.