West Sussex · England
Fire-rated sealant in West Grinstead, West Sussex
Intumescent and fire-rated sealant around gaps, frames and service penetrations in West Grinstead, with a one-year guarantee on every job. Ask us for a quote.
- Door frames with gaps between frame and wall
- Unsealed gaps where pipes and cables go through a wall
- Fire seals that have cracked with movement
What we are called out for in West Grinstead
Lots of unsealed gaps appear long after the building was completed. New cables, pipes and data runs go through walls and ceilings and the hole they leave doesn’t always get resealed.
The problems people normally mention when they call are:
- Cracked or shrunken fire-rated sealant
- Unsealed gaps around fire door frames
- Damaged fire sealant left by other trades
- Open holes round services passing through fire walls
Around West Grinstead, as everywhere, fire rated sealant is only as good as the preparation behind it.
Before you book anyone
- Are they insured?
- How the colour is chosen
- What the cure time is
- What preparation is included
Fire rated sealant for homes and businesses in West Grinstead
Door frame gaps, linear joints and holes around services all have their own details. We check the size and the substrate before choosing the product, then the sealant goes in to the depth the product’s details set. If you are dealing with unsealed gaps around fire door frames and joints picked up in a fire-stopping survey, we can help.
If you have holiday lets, a converted barn used for business or a community building near West Grinstead, the washrooms, kitchens and any fire-rated joints need the same care as a big site.
Big or small, you get the same 12-month guarantee.
- Place
- West Grinstead (RH13)
- Region
- West Sussex
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Why deal with it now?
Leaving a gap until a refurbishment comes round can mean years with it open. Sealing the gap now is a contained job on its own. In a small place like West Grinstead, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
What you get with us
- Homes, businesses and hotels
- 4.9 on Google from 180+ five-star reviews
- Anti-fungal sanitary silicone in wet areas
- One-year guarantee on every job
See our cost guide or customer reviews.
Places near West Grinstead
What else we do in West Grinstead
What affects the cost of fire rated sealant
For a quick quote, just ask. The main things that affect it are:
- Which sealant suits the joint
- Access and height
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
The cost reflects the work involved, not a rough estimate. That’s why we ask a few questions first and agree the price before starting.
Asking for a quote
Before you ask for a quote, have a think about:
- Whether it has been sealed before
- How many joints, rooms or windows are involved
- The problem you’ve noticed
- Any access issues, like height or stairs
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, call 0345 464 0079 or drop us an email.
How it works
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The job generally takes a few hours for a handful of gaps, and longer for a whole building, including the tidy-up. Somewhere as small as West Grinstead, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Access to each area is agreed so the work can run in order.
- Old, damaged or unsuitable sealant is removed.
- Gaps are cleaned of dust and loose material.
- The fire-rated or intumescent sealant is applied and tooled to the tested detail.
- Locations and products are written up and any gaps unsuitable for sealant are flagged.
Before we arrive
- Mention any leaks or damp you’ve noticed
- For business premises, tell us about site rules or sign-in
- Plan for the work area to be out of bounds to pets and children
Getting a quote
To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. We will give you a clear quote before any work starts.
Related advice
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Walls or floors that weren’t built to resist fire
- Sign-off of the building, which sits with building control or your assessor
- Assessing a building’s fire safety
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- Pipe & cable gaps
- Linear gaps
- Service penetrations
- Plasterboard & masonry
- Door frames
- Flats & HMOs
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Include hidden areas like risers in routine checks
- Keep general-purpose foam and caulk away from fire-stopping gaps
- Ask every contractor to reseal any fire stopping they disturb
- Store the list of sealed gaps with your building paperwork
Do not drill through or remove a fire seal without putting it back properly. If you need new services through a sealed wall, plan the fire stopping as part of the job.
Leave a fire-stopping gap open and smoke can move through the building much more easily. Closing it is generally a straightforward job.
Workplaces and buildings in West Grinstead
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 apply fire-rated sealant to the assessor’s or designer’s specification and the product’s tested details.
Community buildings like Shrine Church of Our Lady of Consolation and St Francis are part of the picture too: service openings in its walls need the right fire-rated sealant, as in any building.
West Grinstead is about 6 miles south of Horsham, in West Sussex. Every kind of property in West Grinstead can book us for fire rated sealant, old or new, large or small. Every job comes with our one-year guarantee. Our area takes in 371 places across West Sussex. Our Crawley page covers work nearby.
We work across the RH13 postcode area for fire rated sealant. If you need fire rated sealant at a property on Steyning Road, Carylls Meadow and Clothalls Lane or a nearby road, we can help. We also cover the places around West Grinstead: Littleworth (1 mile south-east), Partridge Green (1 mile south-east), Dial Post (2 miles south-west), Shipley (2 miles west) and Whitehall (2 miles west). Within a short drive, we also cover Crawley (11 miles north-east), Horsham (6 miles north), Worthing (11 miles south), Haywards Heath (10 miles east), Burgess Hill (9 miles east) and Littlehampton (15 miles south-west).
Around West Grinstead
Green spaces nearby include Knepp Wildland.
Questions from West Grinstead
What guarantee comes with fire rated sealant in West Grinstead?
All our work, in West Grinstead and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Can you do fire rated sealant in West Grinstead?
Yes, West Grinstead is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear quote.
Do I have to be there?
It depends on the job. For work indoors, someone needs to let us in, and for outside work we will agree access with you when we book.
Are you insured?
Yes. We’re fully insured.
Can I choose the sealant colour?
In most cases you can choose. We will explain which colours are available.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover West Grinstead, along with the rest of our area.
Can you tell me which gaps need fire stopping?
No. Your fire risk assessor, designer or building control decides that. Our job is applying the sealant to their specification.
Can you quote for more than one area?
Yes. Several rooms, windows or areas can go on one quote.
Surface by surface
Masonry and concrete
Brick, block and concrete walls and floors are sealed with products tested in masonry. The gap is cleaned of dust first.
Door frames
Our work is the joint between frame and wall. Doors, seals and closers are for a door specialist, and we will say if we spot a problem with them.