Hampshire · England

Fire Rated Sealant in Winchester

Specialist fire rated sealant for Winchester: the right sealant, proper preparation and a neat finish. Call for a quick quote.

  • Gaps around pipes and cables through fire-resisting walls
  • Door frames with gaps between frame and wall
  • Standard silicone or caulk in a fire-stopping gap

Fire rated sealant for Winchester homes and businesses

What sealant work cannot fix

Sealant is not the answer to every problem, and we will tell you before we start. It won’t solve:

  • Fire risk assessments, which need a qualified assessor
  • A wall that is not a fire-resisting element to begin with
  • Issuing a fire rating or certificate for a building

If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before you book.

Where we work in Winchester

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

Fire rated sealant in Winchester

Later work by other trades often breaks through fire stopping, especially in flats, HMOs, offices and schools. One new cable or pipe can leave a gap that nobody goes back to seal. We seal them with a product tested for that kind of gap. We work on linear gaps, service penetrations and pipe & cable gaps, and the jobs we see most are seals cut through by electricians, plumbers or data installers and new service routes left unsealed after building work.

Hotels and other accommodation in Winchester need sealant work done around guests. Room-by-room programmes and out-of-hours working can be arranged.

All of our work is guaranteed for twelve months, in Winchester and everywhere else we cover.

Location
Winchester (SO22, SO23, SO32, SO21)
Wider area
Hampshire
Guarantee
One year on every job
Price
Quoted before any work starts
Call
0345 464 0079
Updated
26 October 2026
Eleven members of the Mr Mastic team standing in front of branded white vans

Should I try it myself first?

Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.

A DIY attempt does not rule out a professional job. We cut it out and start again.

What affects the cost of fire rated sealant

For a quick quote, just ask. What matters most is:

  • Whether there’s mould to deal with
  • How much old sealant there is and how hard it is to remove
  • How much there is to do
  • When we can work, for business premises

Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.

Helping us quote

What to tell us when you ask for a quote:

  • The rough size of the job
  • Any access issues, like height or stairs
  • Where the property is
  • The problem you’ve noticed

Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.

FAQs for Winchester

Can you help a landlord with a rental near Winchester station?

Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear price.

Is Winchester in your area for fire rated sealant?

Yes, Winchester is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing.

How long does the job take?

A typical job takes a few hours for a handful of gaps, and longer for a whole building. Your quote will say how long we expect yours to take.

Should I try DIY first?

Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.

What should I tell you?

Tell us what needs doing and where. If we need more, we’ll ask.

Can you fill the gap behind a fire door frame?

Yes. We often seal open gaps hidden behind the architrave. Doors, seals and closers need a door specialist.

What do you put in the joint?

Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we are using and why.

Do you take on fire stopping in schools and offices?

Yes, whether the building is a school, an office, flats or an HMO, and whether it’s in use or not. Let us know the building’s hours and we’ll plan the work to suit.

Keeping the joints in good condition

Simple care keeps the joints in good condition. We recommend:

  • Keep general-purpose foam and caulk away from fire-stopping gaps
  • Report cracked or damaged seals as soon as you notice them
  • Include fire stopping when you schedule refits
  • Ask which product was used before you paint

Don’t drill through or remove a fire seal without putting it back properly. New services through a sealed wall should include fire stopping in the plan.

Small gaps around services are simple to deal with while there are only a few. Leave them and each new job adds another hole and the job gets bigger.

Work for landlords, hotels and businesses

In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.

We work for landlords and agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.

Fire rated sealant in Winchester: local notes

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’re given, installing the product to its tested details. There are hotels and other places to stay in and around Winchester. For hotels, a room-by-room programme keeps most rooms in use while the work goes on.

If you let a flat or house near Winchester station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant. For site and facilities teams at buildings such as St Bede Church of England Primary School, gaps opened by contractors for new cabling are a common finding in schools and offices. For buildings such as St Swithun-upon-Kingsgate Church, gaps around pipes and cables are worth checking after any building work there.

Winchester is in Hampshire. For fire rated sealant in and around Winchester, please ring 0345 464 0079 or email us for a quick quote. We cover Hampshire from our Crawley base, Winchester included. Our Hampshire coverage runs to 683 places, Winchester among them. For nearby work, see our Southampton page (10 miles or so).

Work in SO22, SO23, SO32 and SO21 is quoted and booked the same way as anywhere else. If you need fire rated sealant at a property on The Square, Market Street and Market Lane or anywhere close by, we can help. With the A31 and A32 close by, Winchester is easy for our applicators to reach. Other places close to Winchester include Bar End (1 mile south-east), Highcliffe (1 mile east), Hyde (1 mile north), St Cross (1 mile south) and Stanmore (1 mile south-west). Within a short drive, we also cover Eastleigh (6 miles south), Fareham (15 miles south), Andover (13 miles north-west), Totton (13 miles south-west), Chandler's Ford (6 miles south-west) and Hedge End (10 miles south). Winchester is among the bigger towns we cover in Hampshire.

Local landmarks in Winchester

Typical jobs here are in homes near Peter Symonds College, The Green Man pub and Leigh House Hospital and the streets around them. Winchester’s nearest station is Winchester station, about 0.6 miles north of the centre. Nearby you will also find Winchester City Museum (under half a mile north-east) and St John's Rooms And Chapel (less than half a mile east). For a walk, there’s Winnall Moors and Twyford Down.

Map of Winchester © OpenStreetMap contributors

How the job changes by surface

Service penetrations

Wherever a service goes through a fire-resisting wall or floor, there’s a gap around it. The sealant is chosen for what passes through and how wide the gap is.

Linear gaps

Long, narrow gaps appear where walls meet slabs and ceilings. We seal them to the tested detail, with backing where it’s needed.

What we do, step by step

At the end, we look at the finished work together. The visit itself usually takes from a few hours to a few days, depending on the number of gaps and the access, depending on the amount of work. For homes and businesses in busier parts of Winchester, parking needs a little planning. For flats, mention stairs, lifts and shared entrances as well.

  1. Access to each area is agreed so the work can run in order.
  2. Old, damaged or unsuitable sealant is removed.
  3. Gaps are cleaned of dust and loose material.
  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.

Before we arrive

  • For business premises, tell us about site rules or sign-in
  • Tell us about any previous sealing or DIY attempts
  • Let us know about parking restrictions

How to get a quote

There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or send us an email.

Get a quick quote

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