Hertfordshire · England
Fire-rated sealant in Highfield, Hertfordshire
Intumescent and fire-rated sealant around gaps, frames and service penetrations in Highfield, with a 12-month guarantee on every job. Call for a quick quote.
- Joints picked up in a fire-stopping survey
- Fire seals that have cracked with movement
- Gaps left after a refit or conversion
What we do, step by step
Most of a good job is in the preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes from a few hours to a few days, depending on the number of gaps and the access. A visit to Highfield is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We begin by agreeing the list of gaps from your assessor’s or designer’s requirements.
- We measure every gap and note what it’s in and what passes through.
- Any non-fire-rated filler is removed and the faces cleaned.
- We fit backing where needed and apply the fire-rated sealant to depth.
- We hand over a list of locations and products for your files.
Preparing for the visit
- Move anything stored near the joints
- Let us know about stairs, lifts or work at height
- Let us know if you’ve seen damp or leaks
How to get a quote
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and give you a clear quote before any work starts.
Related advice
Fire rated sealant in Highfield
Fire-rated sealant closes the gaps around pipes, cables and frames where they pass through a fire-resisting wall or floor. We apply intumescent and fire-rated sealants to the manufacturer’s tested details for each gap, and we can record what went where. If you’re dealing with open gaps behind door architraves and gaps flagged on a fire risk assessment, we can help, on pipe & cable gaps, plasterboard & masonry and service penetrations alike.
If you run a pub, café, guest house or shop in or near Highfield, its washrooms and kitchen need the same sealant care as any big building, and fire-rated sealant around service openings should be restored after new pipes or cables go through.
All our work is covered by our one-year guarantee.
- Location
- Highfield (HP2, HP1)
- Region
- Hertfordshire
- Cover
- One year on every job
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
FAQs for Highfield
Is Highfield within the area you cover?
Yes, Highfield is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near Hemel Hempstead station?
Yes. We work for landlords and letting agents as well as householders, and several properties can go on one quote. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Will we have a record of what was sealed?
Yes. We record the locations we have sealed and the products used to keep with your fire safety documents.
Can you tell me how many minutes the seal will last?
We do not certify fire stopping or quote ratings. We apply the specified product to the manufacturer’s details and list the locations and products for you.
Can I add another job to the visit?
Yes. Just list everything you need and we’ll quote it together.
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.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before resealing.
What does fire rated sealant cost?
Size, access and the old material all affect the cost. Ask us for a quote and we’ll talk you through it.
Landlord and commercial work in Highfield
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Housing providers, facilities teams and property managers book us too in Highfield and across Hertfordshire. We can quote a run of properties together, and we’re fully insured.
Quotes for fire rated sealant in Highfield
Jobs vary more than people expect. What affects the quote:
- How many rooms, windows or areas are involved
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
- The amount of work
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Asking for a quote
What to tell us when you ask for a quote:
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- Any access issues, like height or stairs
- What’s wrong with the joints now
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand, and we will come back to you with a quote.
How the job changes by surface
Masonry and concrete
For masonry and concrete, we use a product tested in that substrate. We clean out dust and debris before sealing so the sealant bonds.
Service penetrations
Pipes, cables and ducts passing through fire-resisting walls and floors each leave a gap. The sealant is chosen for what passes through and how wide the gap is.
Why it’s worth doing now in Highfield
Paying for fire stopping that has to be redone is a false economy. If the details weren’t followed, the seal may need redoing when the building is next checked. In a smaller place like Highfield, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Why choose Mr Mastic in Highfield
- 20+ years of sealant experience
- Rated 4.9 stars on Google
- Neat joints and a tidy finish
- An ARBOMaster approved applicator
Take a look at our cost guide and what customers say.
Also near Highfield
Also in Highfield
Fire rated sealant in Highfield: local notes
Highfield is part of Hemel Hempstead, one of the post-war new towns. Hemel Hempstead was planned with its own industrial and business areas, so workplaces sit close to the homes. Their washrooms, kitchens and fire-rated joints need the same upkeep as anywhere. 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 work to the specification you are given, installing the product to its tested details.
For buildings such as St Paul's, service openings in its walls need the right fire-rated sealant, as in any building. Rented homes near Hemel Hempstead station change hands often, and any gap left by new services in shared walls should be closed with a fire-rated product.
Highfield is about 1 mile north of Hemel Hempstead, in Hertfordshire. Highfield gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. We cover 381 towns and villages across Hertfordshire, large and small. You can also see our page for London, about 24 miles away.
Work in HP2 and HP1 is quoted and booked the same way as anywhere else. Fire rated sealant is available to properties on Juno Road, Great Road and Dione Road and the roads around them. You’ll find Highfield on the A4147, so it’s easy for us to get to. Neighbouring places we cover for fire rated sealant include Adeyfield (1 mile south-east), Hemel Hempstead (1 mile south), Piccotts End (1 mile north-west), Grovehill (1 mile south-west) and Woodhall Farm (1 mile south-west). Further out, we also cover Watford (7 miles south), Stevenage (15 miles north-east), St Albans (6 miles east), Welwyn Garden City (12 miles east), Harpenden (6 miles north-east) and Hitchin (15 miles north-east).
Around Highfield
Typical jobs here are in homes near Gadebridge Park, The Old Bell pub and The Astley Cooper School and the streets around them. For rail, the closest station is Hemel Hempstead station, roughly 2.1 miles south-west. Nearby you’ll also find Redbourn Museum (3.3 miles north-east) and Hemel Hempstead Hospital (1.1 miles south-west). Green spaces nearby include Verulamium Lake and Long Deans.
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Signs you need fire rated sealant in Highfield
A lot of fire stopping is out of sight: above ceilings, inside risers and behind panels. Because nobody sees it, gaps go unnoticed until an assessor or surveyor looks.
The problems people generally mention when they call include:
- Unsealed gaps where pipes and cables go through a wall
- Ordinary sealant used where a fire-rated product was needed
- New service routes left unsealed after building work
- Old fire sealant that has split or come away
Schools such as Yewtree Primary School are buildings too, and fire-stopping around service openings should be restored whenever new services go in.
Before booking anyone
- How much experience the applicator has
- What preparation is included
- Which colour the sealant will be
- How long to leave it before use