Greater London · England

Fire Rated Sealant in Orpington

Fire rated sealant for Orpington, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.

  • Standard silicone or caulk in a fire-stopping gap
  • Gaps around pipes and cables through fire-resisting walls
  • Fire seals that have cracked with movement

Fire rated sealant near Orpington

How we handle fire rated sealant in Orpington

Until it’s heated, intumescent sealant behaves like an ordinary sealant; in a fire it expands into the joint. The right product depends on the gap size, the substrate and what passes through, so we work to the manufacturer’s details. Common call-outs are for gaps flagged on a fire risk assessment and fire stopping disturbed by later work, on plasterboard & masonry, pipe & cable gaps and service penetrations.

London’s offices, shops, hotels, student accommodation and blocks of flats all have joints to look after, whether that is washroom resealing or fire-rated sealant around service openings. Out-of-hours working can be arranged where a building in Orpington cannot close.

A one-year guarantee comes with the work, just as it does everywhere we cover.

Location
Orpington (BR5, BR6, BR7, DA14)
Wider area
Greater London
Cover
A year, on every job
Quote
A clear quote up front
Phone
0345 464 0079
Last updated
26 October 2026
Eleven members of the Mr Mastic team standing in front of branded white vans

What happens on the day

Good joint work is mostly preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours for a handful of gaps, and longer for a whole building. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.

  1. We begin by agreeing the list of gaps from your assessor’s or designer’s requirements.
  2. We measure every gap and note what it’s in and what passes through.
  3. Unsuitable material such as ordinary foam or silicone is cut out and the faces cleaned.
  4. We fit backing where needed and apply the fire-rated sealant to depth.
  5. We hand over a list of locations and products.

Before we arrive

  • Clear the area around the work
  • Mention any sign-in or site rules at work premises
  • Where the joints are inside, avoid wetting them before we arrive

Ask for a quote

Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. When it suits you, ring 0345 464 0079 or send us an email.

Ask for a quote

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Leave it or put it right?

For some gaps, sealant is not the right answer and another system is needed. Large holes, cable bundles and plastic pipes can call for batts, collars or wraps. If a gap is not suitable for sealant, we will tell you. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler.

Doing several joints on one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will send you a clear quote for the lot.

Why Orpington customers choose us

  • Experience in homes, commercial sites and hotels
  • Every job guaranteed for a year
  • Trusted Arbo and Everbuild sealants
  • Sanitary silicone with an anti-fungal additive in wet areas

Take a look at our cost guide and our reviews.

Common problems we fix in Orpington

If the sealant is too shallow, has the wrong backing or sits on a dusty surface, it is not installed as tested. Rushed fire stopping is common.

Look out for any of the following:

  • Unsealed gaps where pipes and cables go through a wall
  • Open gaps behind door architraves
  • Damaged fire sealant left by other trades
  • Sealant items on a fire risk assessment action list

Orpington is in London, so parking needs planning: let us know about parking bays, permits or a driveway.

What to look for in a quote

  • Which sealant they’ll use, and why
  • Is VAT in the price?
  • How long to leave it before use
  • How long the guarantee is

Choosing a sealant specialist

Honest limits

New sealant cannot fix everything, and we’d rather say so up front. It will not solve:

  • Construction that does not provide fire resistance on its own
  • Fire doors that need new seals, closers or hardware
  • Fire risk assessments, which need a qualified assessor

Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly.

Where we work in Orpington

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

Landlord and commercial work in Orpington

Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.

We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.

Should I try it myself first?

If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.

Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.

Commercial buildings in Orpington

Orpington has hotels and guest accommodation in and around it. Hotel work can be planned room by room, with out-of-hours working where needed. Many London buildings have tight access and loading restrictions, so out-of-hours working can be arranged where needed.

Schools such as Perry Hall Primary School are buildings too, and gaps opened by contractors for new cabling are a common finding in schools and offices. For buildings such as St Andrew's, gaps around pipes and cables are worth checking after any building work there.

Orpington is about 12 miles south-east of London, in Greater London. Homes, rented property, offices and hotels in Orpington can book us for fire rated sealant, old or new, large or small. Every job comes with our one-year guarantee. Our Greater London coverage runs to 764 places, Orpington among them. There’s also a page for London, roughly 12 miles from Orpington.

Work in BR5, BR6, BR7 and DA14 is quoted and booked the same way as anywhere else. Fire rated sealant is available to properties on High Street, Furzehill Square and Station Road and the roads around them. Orpington is on the A224 and B258, so it’s easy for us to get to with everything needed for fire rated sealant. We also cover the places around Orpington: Poverest (1 mile north), Derry Downs (1 mile east), St Mary Cray (1 mile north), St Paul's Cray (1 mile north) and Goddington (1 mile south). Larger places within reach include London (12 miles north-west), City of Westminster (14 miles north-west), Marylebone (14 miles north-west), Kensington (15 miles north-west), St Pancras (14 miles north-west) and Shoreditch (13 miles north-west).

Local landmarks in Orpington

Locally, jobs take us to homes and businesses close to The Priory School, Jubilee Country Park and Harris Academy Orpington, among other places. The nearest railway station is St Mary Cray station, roughly 0.7 miles north of the centre. Nearby you’ll also find Lullingstone Castle (4.4 miles south-east) and Orpington Hospital (1.5 miles south). For a walk, there’s The Warren and Summer Hill.

Map of Orpington © OpenStreetMap contributors

FAQs for Orpington

Do you work in hotels near Orpington?

Yes, hospitality work, including hotels, is part of what we do. Jobs can be programmed room by room, with out-of-hours working possible to arrange.

I let a flat near St Mary Cray station. Can you help?

Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.

Can you seal over the old sealant?

No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.

Will the old sealant be removed?

Yes. We cut out all the old sealant and clean the joint before applying anything new.

Can you do several jobs on one visit?

Yes. Tell us about everything you’d like done and you’ll get one quote.

Will it make a mess?

Not at all. The area is protected while we work and cleaned up afterwards.

Can I do it myself?

It depends on the job. High-level, external movement and fire-rated joints are professional jobs.

Do I need to be at home?

If the work is inside, we need someone to let us in. Once we have agreed the job, you do not need to watch us work.

What the job involves on each surface

Flats and HMOs

Flats and HMOs rely on fire separation between homes and the common parts. We seal the gaps your assessor has identified room by room.

Masonry and concrete

Core-drilled and broken-out holes in concrete are often irregular. We measure the gap at its widest point to make sure it suits the product.

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