Hertfordshire · England

Stotfold Fire Rated Sealant

Intumescent and fire-rated sealant around gaps, frames and service penetrations in Stotfold, with a one-year guarantee on every job. Ask us for a quote.

  • Sealant items on a fire risk assessment action list
  • Cracked or shrunken fire-rated sealant
  • Open holes round services passing through fire walls

Trusted fire rated sealant in Stotfold

Fire rated sealant for homes and businesses in Stotfold

We often work from an action list drawn up by a fire risk assessor on buildings across Stotfold. If you share the list, we can quote for the gaps that need fire-rated sealant. Common call-outs are for holes left by a change of layout and ordinary sealant used where a fire-rated product was needed, across plasterboard & masonry, flats & HMOs and pipe & cable gaps.

In a smaller place like Stotfold, commercial jobs tend to be smaller buildings: a pub, a surgery, a school, a shop or a few business units. The work is the same as in a big building, just on a smaller scale.

A one-year guarantee comes as standard, so you are covered after we have gone.

Eleven members of the Mr Mastic team standing in front of branded white vans
Where
Stotfold (SG5)
Region
Hertfordshire
Cover
One year on every job
Quote
Quoted before any work starts
Call
0345 464 0079
Updated
26 October 2026

For landlords and businesses

If you manage several properties in or around Stotfold, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and photos by email help.

In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.

Different surfaces, different methods

Linear gaps

Linear gaps run along the head of walls, at floor edges and between panels. We seal them to the tested detail, with backing where it’s needed.

Plasterboard walls

We check that the board around the gap is sound. Loose material is removed so the sealant has a firm edge.

The process

There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes anything from a few hours to several days, depending on how many gaps there are, including the tidy-up. For a job in Stotfold, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.

  1. Access to each area is agreed so the work can run in order.
  2. We take out any damaged or unsuitable sealant.
  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. We record what was done and flag anything that needs a different system.

Preparing for the visit

  • Let us know if you’ve seen damp or leaks
  • Plan for the work area to be out of bounds to pets and children
  • Let us know about stairs, lifts or work at height

How to get a quote

We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or drop us an email.

Ask for a quote

Related advice

DIY sealant or a professional job?

Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.

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.

Common questions in Stotfold

Do you work for landlords with property near Arlesey station?

Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.

Is Stotfold in your area for fire rated sealant?

Yes. We work across London and the South East, and Stotfold is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will send you a clear quote.

Are you ARBOMaster approved?

Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.

Can I choose the sealant colour?

Normally, yes. White, clear and grey are common, and other colours are available for many products, and we will agree it with you first.

Is intumescent sealant the same as fire-rated sealant?

Intumescent means it swells when heated, helping close the gap. Intumescent sealants are one kind of fire-rated sealant; which product suits depends on the gap, the substrate and the service.

Can you tell me how many minutes the seal will last?

That is not something we state or certify. Your specification sets the requirement, and we apply a product tested for it with a record of each location.

Will you assess my building’s fire safety?

No. We follow the requirements from your assessor, designer or building control and install to the manufacturer’s details.

Is there a guarantee?

Yes, always. There’s a 12-month guarantee on every job.

Common problems we fix in Stotfold

Door frames are a common weak spot. The gap between the frame and the wall is hidden behind the architrave, so it’s easy to leave unsealed when doors are changed.

These are the problems we’re asked about most:

  • Gaps flagged on a fire risk assessment
  • Gaps left after a refit or conversion
  • Door frames with gaps between frame and wall
  • Damaged fire sealant left by other trades

Schools such as Roecroft Lower School are buildings too, and service openings in fire-resisting walls need checking after any refurbishment.

What your quote should include

  • Whether they seal over old material or remove it
  • The length of the guarantee
  • How the surfaces are prepared before sealing
  • Is VAT in the price?

Choosing a sealant specialist

Quotes for fire rated sealant in Stotfold

Jobs vary more than people expect. The main factors:

  • Working hours on commercial sites
  • Access and height
  • How much there is to do
  • How many areas need sealing

A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.

Asking for a quote

When you contact us, it’s useful to know:

  • The type of property
  • Where the job is, and your postcode
  • A few photos by email, if you can
  • Roughly how big the job is

Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we will talk you through the work and give you a clear price.

Keeping the joints in good condition

Joint life depends on how it’s used and looked after. We suggest:

  • Report cracked or damaged seals as soon as you notice them
  • Tell trades working in the building that fire seals must be put back
  • Photograph sealed gaps before they’re covered up
  • Keep the record of products and locations with your fire safety documents

Don’t add foam, filler or ordinary sealant over a fire seal. Repairs should use a matching fire-rated product. We can tell you which product we used.

Open gaps don’t only matter in a fire: noise, draughts and even pests can come through too. Dealing with them early helps with all of these.

Commercial buildings in Stotfold

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 apply fire-rated sealant to the assessor’s or designer’s specification and the product’s tested details.

If you let a flat or house near Arlesey station, fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through. Community buildings like Church of St Mary the Virgin are part of the picture too: service openings in its walls need the right fire-rated sealant, as in any building.

Stotfold is about 5 miles north of Hitchin, in Hertfordshire. If you need fire rated sealant in Stotfold, please phone 0345 464 0079 or email us for a quick quote. We are based in Crawley and cover Hertfordshire, Stotfold included. Our Hertfordshire coverage runs to 381 places, Stotfold among them. We also work in London, around 36 miles away.

All of SG5 is within our area for fire rated sealant, from the main roads to the quietest streets. Whether your property is on High Street, Church Road and Meadowsweet Way or a nearby road, our applicators can take on the job. Other places close to Stotfold include Stotfold Common (1 mile north), Radwell (1 mile east), Astwick (1 mile north) and Fairfield (1 mile south-west). Larger places within reach include Stevenage (8 miles south), Welwyn Garden City (15 miles south), Harpenden (15 miles south), Hitchin (5 miles south), Baldock (3 miles south-east) and Benslow (5 miles south).

Around Stotfold

In Stotfold, that means homes and buildings near The Knights Templar School and The Chequers Public House, among other places. For rail, the closest station is Arlesey station, about 1.7 miles north-west. Other landmarks nearby include Fairfield Hospital (1.1 miles south-west) and Bygrave House (3.1 miles east). For a walk, there’s Arlesey Old Moat and Glebe Meadows.

Map of Stotfold © OpenStreetMap contributors
20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job