Kent · England

Fire-rated sealant in Greenhithe, Kent

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

  • Gaps where walls meet ceilings or slabs
  • Holes left by a change of layout
  • Joints picked up in a fire-stopping survey

Need fire rated sealant in Greenhithe?

How we handle fire rated sealant in Greenhithe

We can work through a building room by room or floor by floor, noting the locations and products as we go. It gives you a list to keep with the building’s fire safety documents. Typical jobs include seals cut through by electricians, plumbers or data installers and unsealed gaps around fire door frames, across service penetrations, linear gaps and door frames.

Around a place like Greenhithe, halls, schools and small businesses all have washrooms and kitchens used by many people. Sealant and fire-rated joints there matter as much as in any larger building.

Your job is guaranteed for a year, as with all our work.

The Mr Mastic team in navy uniforms in front of three Mr Mastic vans
Where
Greenhithe (DA9, DA10)
Wider area
Kent
Guarantee
One year on every job
Quote
Quoted before any work starts
Call
0345 464 0079
Last updated
26 October 2026

What we can’t put right

Some problems need a builder, plumber or other trade rather than us:

  • Big openings where sealant alone is not the tested solution
  • Fire risk assessments, which need a qualified assessor
  • Walls or floors that weren’t built to resist fire

Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly before booking.

Where we work in Greenhithe

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

How to look after the new joints

Aftercare is simple:

  • Photograph sealed gaps before they’re covered up
  • Look in service cupboards and ceiling voids from time to time
  • Store the list of sealed gaps with your building paperwork
  • Include fire stopping when you schedule refits

Let contractors know where fire stopping has been done, and make sure anything they disturb is resealed with a suitable product. Later work is a common cause of damaged fire stopping.

If a fire risk assessment has flagged a gap, don’t leave it for the next one. Get it sealed and recorded so the item can be closed.

What fire rated sealant looks like in Greenhithe

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.

Letting a property close to Greenhithe for Bluewater station? Then new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant. Schools such as Knockhall Primary School are buildings too, and gaps opened by contractors for new cabling are a common finding in schools and offices.

Greenhithe is about 3 miles east of Dartford, in Kent. Across the DA9 area, we can carry out fire rated sealant at your property. Our area takes in 922 places across Kent, from the larger towns to small villages. For nearby work, see our London page (17 miles or so).

Work in DA9 and DA10 is quoted and booked the same way as anywhere else. You will find streets such as Bean Road, The Avenue and Abbey Road. Greenhithe is on the A206, so it’s easy for us to get to with everything needed for fire rated sealant. Other places close to Greenhithe include Swanscombe (1 mile south-east), Stone (1 mile south-west), Bean (2 miles south), West Thurrock (2 miles north) and Darenth (2 miles south-west). Further out, we also cover Dartford (3 miles west), Sevenoaks (12 miles south), Gravesend (4 miles east), Northfleet (3 miles south-east), Swanley (6 miles south-west) and Kings Hill (13 miles south-east).

Around Greenhithe

Typical jobs here are in homes near Castle Hill Park, The Ebbsfleet Academy and The White Hart Public House. Greenhithe has its own railway station: Greenhithe for Bluewater station. Nearby you’ll also find Darent Valley Hospital (1.5 miles south-west) and Stone Museum of Geology (1.8 miles west). The countryside around Greenhithe includes Chafford Gorges Nature Park and Sawyers Lake.

Map of Greenhithe © OpenStreetMap contributors

DIY versus a professional finish

Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.

What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.

What we are called out for in Greenhithe

Gaps around door frames are easily missed. The architrave hides the gap between frame and wall, so it can be left open when a door is replaced.

Most people get in touch when they notice one of these:

  • New service routes left unsealed after building work
  • Old fire sealant that has split or come away
  • Standard silicone or caulk in a fire-stopping gap
  • Open gaps behind door architraves

If you look after a church, hall or community building such as Church of St Mary, service openings in its walls need the right fire-rated sealant, as in any building.

Comparing quotes

  • Whether VAT is included
  • How long the guarantee is
  • What the cure time is
  • What happens if they find a problem under the old sealant

How to choose a mastic man

Your questions about fire rated sealant in Greenhithe

Can you do fire rated sealant in Greenhithe?

Yes. We work across London and the South East, and Greenhithe is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.

Do you work for landlords with property near Greenhithe for Bluewater station?

Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can call 0345 464 0079 or email us with the details for a clear quote.

Should I try DIY first?

That depends on the joint. 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.

Is the work guaranteed?

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

Can you match the sealant colour?

Most of the time, yes. We’ll explain which colours are available and agree one before work begins.

Are you insured?

Yes. We’re fully insured, with over 20 years’ experience in sealant work.

Do you remove the old sealant?

Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.

Do you certify the fire stopping?

Ratings and certificates aren’t something we issue. What’s required is set by your assessor or designer, and the product’s tested details show what it achieves; we install to those details and record what we did.

What we do, step by step

A visit follows a simple pattern: we check the joints, protect the area around them, do the work and clear up. It generally takes anything from a few hours to several days, depending on how many gaps there are. A visit to Greenhithe 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. 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.
  4. The specified fire-rated sealant goes in over any backing its detail requires.
  5. We hand over a list of locations and products.

Preparing for the visit

  • Mention any tricky access
  • Let us know about parking restrictions
  • Keep pets and children clear of the area while we work

How to get a quote

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

Ask for a quote

Read more

Leave it or put it right?

Items left open on a fire risk assessment tend to come back at the next review. Having them sealed and recorded now gives you evidence that the item was dealt with. In a smaller place like Greenhithe, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.

No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.

Why us?

  • We never seal over old sealant
  • Experience in homes, commercial sites and hotels
  • 20+ years of sealant experience
  • Approved under the ARBOMaster scheme

Take a look at what affects the cost and our reviews.

Surface by surface

Linear gaps

Gaps along the top of partitions are easy to miss above a ceiling. We work along the whole run leaving no stretch unsealed.

Service penetrations

Pipes, cables and ducts passing through fire-resisting walls and floors each leave a gap. We seal it with a product tested for that service and gap size.

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