Kent · England

Fire-rated sealant in Hartley, Kent

We cover Hartley for intumescent and fire-rated sealant around gaps, frames and service penetrations. Old material cut out, joints cleaned and sealed neatly.

  • Seals cut through by electricians, plumbers or data installers
  • Open joints along the top of partitions
  • Gaps left after a refit or conversion

Need fire rated sealant in Hartley?

Fire rated sealant in Hartley, done properly

In flats, HMOs, offices and schools, fire stopping is often disturbed by later work. A new cable run or a replaced pipe can leave an open hole behind. We seal them with a product tested for that kind of gap. If you have standard silicone or caulk in a fire-stopping gap and fire seals that have cracked with movement, we can put it right, whatever the surface.

In a smaller place like Hartley, 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.

Big or small, you get the same 12-month guarantee in Hartley and across Kent.

Place
Hartley (DA3)
Wider area
Kent
Guarantee
A year, on every job
Quote
A clear quote up front
Telephone
0345 464 0079
Last updated
26 October 2026
The Mr Mastic team in navy uniforms in front of three Mr Mastic vans

Fire rated sealant around Hartley

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 look after a building such as Hartley Primary Academy, service openings in fire-resisting walls need checking after any refurbishment. For buildings such as Church of Saint Mary, service openings in its walls need the right fire-rated sealant, as in any building. Rented homes near Longfield station change hands often, and any gap left by new services in shared walls should be closed with a fire-rated product.

Hartley is about 4 miles south-west of Northfleet, in Kent. Our applicators cover fire rated sealant for homes and businesses in Hartley, as part of our work across Kent. Hartley is one of 922 places in Kent we cover for fire rated sealant. Our London page covers work nearby.

Our applicators cover all of the DA3 postcode area for fire rated sealant. Whether your property is on Church Road, Dickens Close and Stack Lane or anywhere close by, we can help. If you are just outside Hartley, we cover Longfield (1 mile north), New Barn (1 mile north-east), Longfield Hill (1 mile east), New Ash Green (1 mile south) and Nash Street (2 miles east). Further out, we also cover Maidstone (13 miles south-east), Dartford (5 miles north-west), Sevenoaks (9 miles south-west), Gravesend (4 miles north-east), Tonbridge (13 miles south) and Northfleet (4 miles north-east).

Landmarks near Hartley

In Hartley, that means homes and buildings near Railway Tavern, Rectory Meadow and Longfield Academy and the streets around them. Hartley’s nearest station is Longfield station, about 0.8 miles north-west of the centre. Nearby you will also find Darent Valley Hospital (4 miles north-west) and Stone Castle (4.1 miles north). Not far away are Sawyers Lake.

Map of Hartley © OpenStreetMap contributors

What happens if it’s left?

Waiting for the next refit can leave a gap open for years. Sealing the gap now is a contained job on its own that does not depend on other work. Around Hartley, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.

Doing several joints on one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will send you a clear quote for the lot.

Why book with us

  • Arbo and Everbuild products
  • An ARBOMaster approved applicator
  • We never seal over old sealant
  • Over 20 years’ experience

Read how sealant jobs are priced or customer reviews.

Honest limits

New sealant cannot fix everything, and we’d rather say so up front. Sealant will not put right:

  • Construction that doesn’t provide fire resistance on its own
  • Deciding what fire stopping a building needs
  • Problems with the door itself rather than the gap around the frame

If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before booking.

What we seal

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

Looking after it afterwards

No joint lasts for ever, but care makes a real difference. A few tips:

  • File the fire-stopping record where your assessor can find it
  • Tell trades working in the building that fire seals must be put back
  • Take photos of fire stopping before ceilings or boxing go back
  • Do not fill fire-stopping gaps with ordinary foam or silicone

Include fire stopping in your regular building checks. Look for cracks, gaps or sealant that has been cut or pulled out and get them seen to.

A gap left open in a fire-resisting wall or floor lets smoke spread in ways the building wasn’t designed for. Sealing it early is a simple step to take.

The process

Before we leave, we go over the finished joints with you. The work normally takes from a few hours to a few days, depending on the number of gaps and the access, depending on the amount of work. A visit to Hartley is planned like any other: the time, the access and where to park are agreed in advance. 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. Old, damaged or unsuitable sealant is removed.
  3. Dust and loose debris are cleaned from each gap.
  4. We apply and tool the sealant to the product’s tested detail.
  5. Locations and products are written up and any gaps unsuitable for sealant are flagged.

Preparing for the visit

  • Where the joints are inside, avoid wetting them before we arrive
  • For business premises, tell us about site rules or sign-in
  • Clear the area around the work

How to get a quote

For a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. We will give you a clear price before any work starts.

Get a price

Read more

DIY versus a professional finish

Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.

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.

Your questions about fire rated sealant in Hartley

Can you do fire rated sealant in Hartley?

Yes, Hartley is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.

Will you come out to Hartley?

Yes, Hartley is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.

What does intumescent mean?

Fire-rated is the broad term for sealants tested for fire stopping. Intumescent types expand when heated, and they’re one option among several. We use whichever the specification and tested details call for.

Can you fill the gap behind a fire door frame?

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

Do you provide details of the products used?

Yes. We record the locations we have sealed and the products used to keep with your fire safety documents.

Will the old sealant be removed?

Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.

Do you offer different sealant colours?

We will suggest a colour to suit the surroundings. The product needed can limit the range.

What fire rating will the seal have?

We don’t issue ratings or certificates ourselves. What’s required is set by your assessor or designer, and the product’s tested details show what it achieves.

How we quote for fire rated sealant

We do not publish a price list, because jobs vary so much. What we look at:

  • Working hours on commercial sites
  • Whether old sealant or filler has to be cut out
  • The type of sealant required
  • The size of the job

There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or drop us an email.

Asking for a quote

The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:

  • Roughly how big the job is
  • How we’d reach the joints
  • Any previous sealing or DIY work
  • Where the property is

Every job is quoted individually. Just ring 0345 464 0079 or send us an email with the details.

Landlords, agents and businesses in Hartley

We also work for property managers and facilities teams in Hartley and across Kent. Several sites can be quoted together.

Hotels need rooms back in use, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.

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