Hertfordshire · England

Fire Rated Sealant in Broad Colney

Specialist fire rated sealant for Broad Colney: careful preparation, the right product and tidy work. Call for a quick quote.

  • Fire seals that have cracked with movement
  • Gaps flagged on a fire risk assessment
  • Fire stopping disturbed by later work

Fire rated sealant for Broad Colney homes and businesses

What happens on the day

When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes from a few hours to a few days, depending on the number of gaps and the access. Somewhere as small as Broad Colney, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.

  1. Before starting, we go through the specification or action list with you.
  2. Each gap is measured and its substrate and service noted.
  3. Unsuitable material such as ordinary foam or silicone is cut out and the gap cleaned.
  4. We fit backing where needed and apply the fire-rated sealant to depth.
  5. Every location is recorded with the product used for your files.

Preparing for the visit

  • Let us know about stairs, lifts or work at height
  • Where the joints are inside, avoid wetting them before we arrive
  • Mention any leaks or damp you’ve noticed

Getting a quote

Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, ring 0345 464 0079 or email us.

Get a price

Read more

Fire rated sealant in Broad Colney, done properly

We often work from an action list drawn up by a fire risk assessor on buildings across Broad Colney. Send us the list or the survey and we’ll quote for the fire-rated sealant work on it. We work on plasterboard & masonry, service penetrations and pipe & cable gaps, and the jobs we see most are gaps filled with a product that isn’t fire-rated and open joints along the top of partitions.

Work in a small place like Broad Colney is planned ahead, journey included, so it can be fitted around guests, clients or events where possible.

Each job carries a 12-month guarantee, large or small.

Where
Broad Colney (AL2)
Wider area
Hertfordshire
Guarantee
12 months on all our work
Price
A clear quote up front
Call
0345 464 0079
Page updated
26 October 2026
The Mr Mastic team in navy uniforms in front of three Mr Mastic vans

Broad Colney questions

Can you do fire rated sealant in Broad Colney?

Yes, Broad Colney is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we will send you a clear quote.

I let a flat near Park Street station. Can you help?

Yes. We work for letting agents and landlords as well as householders, and several properties can go on one quote. You can call 0345 464 0079 or email us with the details for a clear quote.

Where do you work from?

We work from Crawley. We cover Broad Colney and the rest of Hertfordshire, along with the rest of our area.

Do the sealants smell?

That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.

Will it make a mess?

We keep the work tidy. We protect what’s around the joints, and we clear up when we are done.

Which products do you use?

We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll tell you what we are using.

Is standard sealant good enough for a fire gap?

No. It might close the gap, but it isn’t a fire-rated seal. Use a product tested for that gap and service.

Do you hold any approvals?

Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.

When to call us in Broad Colney

Sealant applied too thin, without the backing its detail needs, or onto dust won’t perform as it was tested. Rushed fire stopping is common particularly when it was the last job before handover.

It’s worth asking for a quote if you see:

  • Fire seals that have cracked with movement
  • Holes left by a change of layout
  • Open joints along the top of partitions
  • Gaps flagged on a fire risk assessment

Community buildings like Church of St Peter are part of the picture too: older buildings that have had new heating or wiring often have service gaps worth checking.

Comparing quotes

  • Whether VAT is included
  • What insurance they hold
  • What guarantee comes with the work
  • Whether the sealant suits the joint

10 questions to ask before booking

Landlord and commercial work in Broad Colney

If you manage several properties in or around Broad Colney, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.

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

How the job changes by surface

Door frames

We deal with the gap around the frame, not the door. The door leaf, its seals and closer need a door specialist and we’ll mention anything we notice.

Plasterboard walls

We check that the board around the gap is sound. Crumbling edges are cleaned back before the sealant goes in.

Commercial buildings in Broad Colney

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 are given, installing the product to its tested details.

If you let a flat or house near Park Street station, any gap left by new services in shared walls should be closed with a fire-rated product. Schools such as Saint Bernadette Catholic Primary School are buildings too, and gaps opened by contractors for new cabling are a common finding in schools and offices.

Broad Colney is about 3 miles south-east of St Albans, in Hertfordshire. Whether you’re in the middle of Broad Colney or further out, we cover fire rated sealant for every kind of property, from flats and houses to offices and hotels. Broad Colney is one of 381 towns and villages in Hertfordshire we cover for fire rated sealant. You can also see our page for London, roughly 17 miles from Broad Colney.

Here we cover the AL2 postcode area for fire rated sealant. We also cover London Colney (1 mile north), Shenleybury (1 mile south-east), Tyttenhanger (2 miles north), Sleapshyde (3 miles north-east) and Colney Heath (3 miles north-east). Within a short drive, we also cover Watford (6 miles south-west), Hemel Hempstead (7 miles west), Stevenage (14 miles north), St Albans (3 miles north-west), Welwyn Garden City (7 miles north-east) and Harpenden (7 miles north).

What’s near Broad Colney

In Broad Colney, that means homes and buildings near The White Lion pub and Samuel Ryder Academy. Broad Colney’s nearest station is Park Street station, roughly 1.9 miles north-west of the centre. Other landmarks nearby include Hilfield Castle (4.5 miles south) and Radlett and District Museum (2.5 miles south). Open spaces near Broad Colney include Verulamium Lake and Broad Colney Lakes.

Map of Broad Colney © OpenStreetMap contributors

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 that does not depend on other work. Where a wall is exposed, as many are in small places like Broad Colney, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.

The cost reflects the work involved, not guesswork. That’s why we ask about the job first and give you a clear price before work begins.

What you get with us

  • Quality sealants from Arbo and Everbuild
  • Every job guaranteed for a year
  • Old sealant always removed completely
  • Anti-fungal silicone where joints get wet

See what affects the cost or customer reviews.

Can I do it myself?

The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.

What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.

When it is not the sealant

New sealant cannot fix everything, and we’d rather say so up front. It won’t solve:

  • Assessing a building’s fire safety
  • Openings too large for sealant, which need batts, boards or another system
  • Walls or floors that weren’t built to resist fire

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

Surfaces we seal

  • Plasterboard & masonry
  • Service penetrations
  • Flats & HMOs
  • Pipe & cable gaps
  • Linear gaps
  • Door frames
20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job