Kent · England

Fire Rated Sealant in Dartford

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

  • Open holes round services passing through fire walls
  • Cracked or shrunken fire-rated sealant
  • Open joints along the top of partitions

Book fire rated sealant in Dartford

How we handle fire rated sealant in Dartford

Until it’s heated, intumescent sealant behaves like an ordinary sealant; then it swells to help close the gap. 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. We work on plasterboard & masonry, pipe & cable gaps and door frames, and the jobs we see most are standard silicone or caulk in a fire-stopping gap and sealant items on a fire risk assessment action list.

In a town like Dartford, commercial work can mean offices, shops, schools, surgeries or small business units. All of them have washroom and kitchen joints, and many have fire-rated joints around pipes and cables.

The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we’ll put it right.

Location
Dartford (DA1, DA2, DA5, DA13)
Region
Kent
Guarantee
12 months on all our work
Quote
A clear quote up front
Phone
0345 464 0079
Page updated
26 October 2026
The Mr Mastic team in navy uniforms in front of three Mr Mastic vans

What fire rated sealant looks like in Dartford

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, 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.

Community buildings like Church of the Holy Trinity are part of the picture too: older buildings that have had new heating or wiring often have service gaps worth checking. For landlords with property near Dartford station, fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through. For site and facilities teams at buildings such as Dartford Primary Academy, gaps opened by contractors for new cabling are a common finding in schools and offices.

Dartford is about 14 miles east of London, in Kent. Jobs in Dartford get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Dartford is one of 922 towns and villages in Kent we cover. You can also see our page for London, about 14 miles away.

We work across the DA1, DA2, DA5 and DA13 postcode area for fire rated sealant. Whether your property is on High Street, Market Street and Temple Hill Square or a nearby road, our applicators can take on the job. With the A2 and A206 close by, Dartford is simple for us to get to for fire rated sealant. Nearby, we also carry out fire rated sealant in Temple Hill (1 mile north), Hawley (1 mile south), Stone (2 miles east), Clement Street (2 miles south) and Darenth (2 miles south-east). Within a short drive, we also cover Sevenoaks (11 miles south), Gravesend (7 miles east), Northfleet (5 miles east), Swanley (4 miles south-west), Kings Hill (14 miles south-east) and Swanscombe (3 miles east). As one of the bigger places in Kent, Dartford has homes, rented property and businesses of every kind.

What’s near Dartford

Around Dartford, our work takes us to homes and buildings near The Rose pub, Stone Lodge School and Leigh Academy, among other places. Dartford has its own railway station: Dartford station. A little further out are Dartford Library (under half a mile west) and Bluewater (2.1 miles east). The countryside around Dartford includes Wansunt Pit and Sawyers Lake.

Map of Dartford © OpenStreetMap contributors

Landlords, agents and businesses in Dartford

A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.

We work for landlords and agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.

How to look after the new joints

How long the joints last depends on use and care. Here’s what we suggest:

  • Allow for resealing whenever new services are run
  • Ask which product was used before you paint
  • Report cracked or damaged seals as soon as you notice them
  • Take photos of fire stopping before ceilings or boxing go back

Do not drill through or remove a fire seal without putting it back properly. If you need new services through a sealed wall, plan the fire stopping as part of the job.

Leave a fire-stopping gap open and smoke can move through the building much more easily. Closing it is usually a straightforward job.

What affects the quote in Dartford

Call for a quick quote. What matters most is:

  • The number and length of the joints
  • How many areas need sealing
  • The product the joint needs
  • When we can work, for business premises

Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, phone 0345 464 0079 or drop us an email and we will give you an honest view and a quote.

Asking for a quote

Photos by email are helpful but not essential. Please mention:

  • Photos by email, if that is easy
  • Where the property is
  • If someone has resealed it before
  • The rough size of the job

We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or drop us an email and describe the job and send pictures if you have them.

Honest limits

In fairness, some problems need a different trade:

  • Large holes that need a different fire-stopping system
  • Fire risk assessments, which need a qualified assessor
  • A wall that is not a fire-resisting element to begin with

If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think.

Where we work in Dartford

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

What we do, step by step

When we arrive, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before any work begins. The work generally takes anything from a few hours to several days, depending on how many gaps there are. For a job in Dartford, we need access to where the work is and somewhere nearby to park. For outside work, let us know about side access, gates and any upper-floor joints.

  1. We begin by agreeing the list of gaps from your assessor’s or designer’s requirements.
  2. Each gap is measured and its substrate and service noted.
  3. Any non-fire-rated filler is removed and the gap cleaned.
  4. The specified fire-rated sealant goes in over any backing its detail requires.
  5. Every location is recorded with the product used for your files.

Before we arrive

  • For business premises, tell us about site rules or sign-in
  • Clear items away from the joints we’re working on
  • Plan for the work area to be out of bounds to pets and children

Get a quote

Want a quote for fire rated sealant? Please call 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.

Get a price

Read more

Why deal with it now?

If an assessor has flagged gaps, it makes sense to close them before the next review. Having them sealed and recorded now means you can show the action was taken. In Dartford, as anywhere, most leaks start as a small gap in a joint, and early is when they’re cheapest and quickest to sort.

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 the work is at height. We take all of that into account in your quote.

What you get with us

  • We are fully insured
  • 180+ five-star Google reviews
  • Over 20 years’ experience
  • A 12-month guarantee on all work

Read what affects the cost and what customers say.

Questions from Dartford

Can you do fire rated sealant in Dartford?

Yes. Our work covers London and the South East, and Dartford is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear quote.

I let a flat near Dartford station. Can you help?

Yes. We work for letting agents and landlords as well as homeowners, 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.

Do you do fire sealant around door frames?

Yes. The joint between frame and wall is sealed with a fire-rated sealant following the tested details. The door, its seals and closer are for a door specialist.

Do you guarantee your work?

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

What information do you need?

A short description and the location, plus photos if you have them. If we need more, we will ask.

Are you an approved applicator?

Yes. We are approved under the ARBOMaster scheme.

What fire rating will the seal have?

Ratings and certificates are not something we issue. The performance comes from the product’s tested details and the specification from your assessor or designer.

Is it worth trying it myself?

It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.

Should I try it myself first?

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

The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.

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