Hampshire · England

Chithurst Fire Rated Sealant

Intumescent and fire-rated sealant around gaps, frames and service penetrations in Chithurst, with a 12-month guarantee on every job. Call for a quick quote.

  • Gaps flagged on a fire risk assessment
  • Door frames with gaps between frame and wall
  • Linear gaps at the head of walls

Fire rated sealant near Chithurst

Fire rated sealant for homes and businesses in Chithurst

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 work to the manufacturer’s details. Typical jobs include old fire sealant that has split or come away and unsealed gaps where pipes and cables go through a wall, on pipe & cable gaps, service penetrations and flats & HMOs.

For holiday lets, converted business premises or a community building near Chithurst, the washrooms, kitchens and any fire-rated joints need the same care as a big site.

Whatever the size of the job, it’s backed by our one-year guarantee.

Eleven members of the Mr Mastic team standing in front of branded white vans
Location
Chithurst (GU31)
Region
Hampshire
Guarantee
A year, on every job
Quote
Quoted before any work starts
Phone
0345 464 0079
Updated
26 October 2026

Signs you need fire rated sealant in Chithurst

Buildings are refitted and reconfigured over the years. Conversions to flats and HMOs, and office refits, create new walls and new routes for services, with gaps to match.

The most common problems we see are:

  • Open gaps behind door architraves
  • Damaged fire sealant left by other trades
  • Gaps filled with a product that isn’t fire-rated
  • Gaps left after a refit or conversion

If you let a flat or house near Liphook station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.

Before booking anyone

  • Is the old sealant removed completely?
  • Whether you can choose the colour
  • What the cure time is
  • How hidden problems are handled

How to choose a mastic man

Honest limits

It helps to know what we can’t do:

  • Fire risk assessments, which need a qualified assessor
  • Walls or floors that weren’t built to resist fire
  • Doors that aren’t fire doors in the first place

If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before you book.

Where we work in Chithurst

  • Door frames
  • Service penetrations
  • Pipe & cable gaps
  • Plasterboard & masonry
  • Linear gaps
  • Flats & HMOs

Looking after it afterwards

Good habits help new joints last longer. Our tips:

  • Plan fire stopping into any work that goes through walls or floors
  • Check whether a sealant can be painted before decorating over it
  • Report cracked or damaged seals as soon as you notice them
  • Keep general-purpose foam and caulk away from fire-stopping gaps

Leave the sealant to cure fully before painting near it. Not every fire-rated sealant takes paint, so ask us which we used.

A gap left open in a fire-resisting wall or floor lets smoke spread in ways the building wasn’t designed for. Closing it is usually a straightforward job.

What we do, step by step

There is not much for you to do on the day. Show us the job and we will take it from there. 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 Chithurst, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.

  1. Access to each area is agreed so the work can run in order.
  2. We take out any damaged or unsuitable sealant.
  3. Dust and loose debris are cleaned from each gap.
  4. The fire-rated or intumescent sealant is applied and tooled to the tested detail.
  5. Locations and products are written up and any gaps unsuitable for sealant are flagged.

Getting ready for the visit

  • Move anything stored near the joints
  • Mention any tricky access
  • Keep pets and children clear of the area while we work

Get a quote

There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or email us.

Ask for a quote

Related advice

Why it’s worth doing now in Chithurst

Waiting for the next refit can leave a gap open for years. Sealing the gap now is a contained job on its own and needn’t wait for anything else. In a small place like Chithurst, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.

The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first.

Why us?

  • One-year guarantee on every job
  • Arbo and Everbuild products
  • Full insurance on every job
  • We never seal over old sealant

Take a look at what affects the cost and customer reviews.

Your questions about fire rated sealant in Chithurst

Do you cover smaller places like Chithurst?

Yes. Chithurst is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.

Do you work for landlords with property near Liphook station?

Yes, we work for landlords and letting agents. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before any work starts.

Is standard sealant good enough for a fire gap?

No. A gap that needs fire stopping needs a tested fire-rated product.

Will there be a smell?

It depends on the product. Some products have a noticeable smell, others very little.

Can you seal over the old sealant?

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.

Can you tell me which gaps need fire stopping?

No, assessment is not something we do. Once you have a specification or action list from your assessor or designer, we can quote for the fire-rated sealant items.

Do I need to be at home?

It depends on the job. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.

How long does fire rated sealant take?

It depends on the size of the job, but most jobs take a few hours for a handful of gaps, and longer for a whole building. We’ll tell you when we quote.

Workplaces and buildings in Chithurst

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’re given, installing the product to its tested details.

For site and facilities teams at buildings such as Stedham Primary School, gaps opened by contractors for new cabling are a common finding in schools and offices. Community buildings like Chithurst Church are part of the picture too: older buildings that have had new heating or wiring often have service gaps worth checking.

Chithurst is about 6 miles east of Petersfield, in Hampshire. We provide fire rated sealant to homes and businesses in Chithurst and the surrounding area. Chithurst is one of 683 places in Hampshire we cover. Our Portsmouth page covers work nearby (18 miles or so).

All of GU31 is within our area for fire rated sealant, from the main roads to the quietest streets. Nearby, we also carry out fire rated sealant in Trotton Marsh (1 mile north-west), Borden (1 mile north-west), Rogate (2 miles west), Milland (2 miles north) and Rake (4 miles north-west). Further out, we also cover Havant (13 miles south-west), Horndean (11 miles south-west), Alton (13 miles north-west), Waterlooville (13 miles south-west), Petersfield (6 miles west) and Purbrook (14 miles south-west).

Near you in Chithurst

We work in homes and buildings around The Keeper's Arms Public House and the streets around them. The nearest railway station is Liphook station, roughly 4.9 miles north of the centre. A little further out are Midhurst Museum (2.9 miles east) and Midhurst Community Hospital (2.9 miles east). For a walk, there’s Wheeler's Down and Iping and Stedham Commons.

Map of Chithurst © OpenStreetMap contributors

Quotes for fire rated sealant in Chithurst

We quote each job individually. These are the things that affect it:

  • The old material and how stubborn it is
  • The type of sealant required
  • The number of rooms or windows
  • Any working-time requirements on site

There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.

What we need to know

What to tell us when you ask for a quote:

  • Roughly how big the job is
  • Where the job is, and your postcode
  • A few pictures by email, if you can
  • Whether it has been sealed before

For a quote, phone 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.

DIY versus a professional finish

If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.

If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.

20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job