Greater London · England

Coulsdon Fire Rated Sealant

Intumescent and fire-rated sealant around gaps, frames and service penetrations for homeowners, landlords and businesses in Coulsdon. Fully insured, ARBOMaster approved and guaranteed for a year.

  • Fire seals that have cracked with movement
  • Gaps filled with a product that isn’t fire-rated
  • Fire stopping disturbed by later work

Fire rated sealant in Coulsdon

The process

We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. Most jobs take anything from a few hours to several days, depending on how many gaps there are. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents 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.
  4. We fit backing where needed and apply the fire-rated sealant to depth.
  5. We hand over a list of locations and products for your records.

Before we arrive

  • Try not to wet indoor joints just before the visit
  • Tell us about any water getting in
  • Clear items away from the joints we’re working on

How to get a quote

The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.

Ask for a quote

Read more

Fire rated sealant for homes and businesses in Coulsdon

Filling a fire-stopping gap with standard silicone or caulk doesn’t make it fire-rated. Anything unsuitable comes out first and the gap is resealed with a product tested for that use. If you have door frames with gaps between frame and wall and gaps around pipes and cables through fire-resisting walls, we can put it right.

London’s offices, shops, hotels, student accommodation and blocks of flats all have joints to look after, whether that’s washroom resealing or fire-rated sealant around service openings. Where a building in Coulsdon needs to stay open, work can be planned outside normal hours.

All of our work is guaranteed for twelve months.

Location
Coulsdon (CR5, CR8, CR3)
Wider area
Greater London
Guarantee
One year on every job
Quote
A clear price before we start
Call
0345 464 0079
Updated
26 October 2026
The Mr Mastic team in navy uniforms in front of three Mr Mastic vans

Surface by surface

Linear gaps

Long, narrow gaps appear where walls meet slabs and ceilings. We seal them to the tested detail, with backing where it’s needed.

Flats and HMOs

Converted houses often have gaps around old and new services. We seal the ones on your specification with a tested product.

Aftercare tips

Aftercare is simple, and it makes a real difference:

  • Take pictures of fire stopping before ceilings or boxing go back
  • Never patch a fire seal with standard sealant
  • Check whether a sealant can be painted before decorating over it
  • Plan fire stopping into any work that goes through walls or floors

Any fire seal that’s cut or drilled needs resealing to its tested detail. If you need new services through a sealed wall, plan the fire stopping as part of the job.

If a fire risk assessment has flagged a gap, do not leave it for the next one. Have it sealed, then keep the record so you can show it was dealt with.

How we quote for fire rated sealant

The price is agreed before any work begins. It takes into account:

  • The old material and how stubborn it is
  • The number of rooms or windows
  • The product the joint needs
  • The number and length of the joints

Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.

What to tell us for a quote

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

  • Whether it has been sealed before
  • Photos by email, if that is easy
  • Whether it’s a home or a business
  • Any access issues, like height or stairs

For a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before we start.

Honest limits

It helps to know what we cannot do:

  • Certifying a building or signing off its fire safety
  • Construction that does not provide fire resistance on its own
  • Doors that aren’t fire doors in the first place

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

Where we work in Coulsdon

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

DIY versus a professional finish

If you’ve already had a go yourself, that is fine. We cut it out and start again.

Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.

Work for landlords, hotels and businesses

Hotels need rooms back in use, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.

Housing providers, facilities teams and property managers book us too in Coulsdon and across Greater London. Several sites can go on one quote.

Your questions about fire rated sealant in Coulsdon

Is parking a problem for a job in Coulsdon?

Parking in Coulsdon, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.

I let a flat near Coulsdon South 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 will send you a clear quote.

Is there any odour?

It depends on the product. Some smell for a while, some hardly at all.

How do I get a quote for fire rated sealant in Coulsdon?

It depends on the job, so we quote each one individually. For a quick quote, ring 0345 464 0079 or send us an email with a short description of the job.

Can new sealant go over the old?

No, and we never do. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.

Are you ARBOMaster approved?

Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.

What do you need from me for a quote?

Where the job is, what the problem is and roughly how big it is. Photos by email help too.

Can you give us a record of the work?

Yes. Locations and products are written up when we finish. If you need photos or a set layout, ask when you get a quote.

Commercial buildings in Coulsdon

Many London buildings have tight access and loading restrictions, so out-of-hours working can be arranged where needed. 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.

Rented homes near Coulsdon South station change hands often, and fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through. Community buildings like St Andrew's Church are part of the picture too: older buildings that have had new heating or wiring often have service gaps worth checking. As a London address, Coulsdon can be tricky for parking: let us know about parking bays, permits or a driveway.

Coulsdon is about 13 miles south of London, in Greater London. Coulsdon gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. 764 places in Greater London are on our list, from the larger towns to small villages. For nearby work, see our London page.

All of CR5, CR8 and CR3 is within our area for fire rated sealant, from the main roads to the quietest streets. We cover properties on Hadleigh Grove, Farthing Way and Dobson Close. Main roads around Coulsdon include the B276 and B2030. We also cover Woodcote (1 mile north), Old Coulsdon (1 mile south-east), Woodmansterne (1 mile west), Chipstead (1 mile south-west) and Purley (2 miles north-east). Within a short drive, we also cover London (13 miles north), City of Westminster (14 miles north), Marylebone (14 miles north), Kensington (13 miles north), St Pancras (15 miles north) and Shoreditch (15 miles north).

Around Coulsdon

In Coulsdon, that means homes and buildings near Dollypers Hill, Coulsdon Sixth Form College and The Pembroke pub, among other places. There’s a railway station in Coulsdon itself: Coulsdon South station. Other landmarks nearby include Croydon Airport Visitor Centre (3 miles north) and Purley War Memorial Hospital (2 miles north-east). Not far away are Duppas Hill and Mercers Lake.

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