Greater London · England

Fire-rated sealant in Cheam, Greater London

Problem with your fire-stopping gaps in Cheam? We cut out the old, prepare the joints and apply the right sealant.

  • Open gaps behind door architraves
  • Gaps left after a refit or conversion
  • Unsealed gaps where pipes and cables go through a wall

Fire rated sealant in Cheam

Why deal with it now?

Doing it once, properly, beats doing it twice. Work that doesn’t follow the tested detail may have to come out again when the building is next checked. In a flat in Cheam, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.

The cost reflects the work involved, not a rough estimate. That is why we ask about the job first.

Why book with us

  • Old sealant always removed completely
  • 4.9 on Google from 180+ five-star reviews
  • Neat joints and a tidy finish
  • Full insurance on every job

Read our cost guide or what customers say.

Fire rated sealant in Cheam, done properly

Door frame gaps, linear joints and holes around services all have their own details. Measuring the gap and checking what it’s made of comes first, then the sealant goes in to the depth the product’s details set. We work on plasterboard & masonry, linear gaps and service penetrations, and the jobs we see most are unsealed gaps where pipes and cables go through a wall and gaps where walls meet ceilings or slabs.

In London, a commercial job often starts with access: loading bays, building rules and lifts. For a building in Cheam, we agree timings and access before anything starts, and room-by-room programmes can be planned where needed.

There’s a 12-month guarantee on every job, whatever its size.

Eleven members of the Mr Mastic team standing in front of branded white vans
Location
Cheam (SM2, SM3, SM1)
Wider area
Greater London
Guarantee
12 months on all our work
Price
A clear price before we start
Call
0345 464 0079
Updated
26 October 2026

Landlords, agents and businesses in Cheam

Housing providers, facilities teams and property managers book us too in Cheam and across Greater London. We can quote a run of properties together, and we are fully insured for the work.

Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.

Fire rated sealant in Cheam: local notes

Many London buildings have tight access and loading restrictions, and out-of-hours working is possible to arrange. 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, and gaps around services are often picked up there. We work to the specification you are given, installing the product to its tested details.

If you look after a church, hall or community building such as Church of St Andrew, service openings in its walls need the right fire-rated sealant, as in any building. Schools such as Glaisdale School are buildings too, and gaps opened by contractors for new cabling are a common finding in schools and offices. As a London address, Cheam can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.

Cheam is about 1 mile south-west of Sutton, in Greater London. Anywhere in SM2, we cover fire rated sealant for homes and businesses. Our Greater London coverage runs to 764 places, Cheam among them. For nearby work, see our London page, about 12 miles away.

We cover every part of the SM2, SM3 and SM1 postcode area for fire rated sealant. Local streets include Wray Road, York Road and The Avenue. Neighbouring places we cover for fire rated sealant include Belmont (1 mile south-east), Cuddington (1 mile north-west), North Looe (1 mile south-west), North Cheam (2 miles north) and Nork (2 miles south). Larger places within reach include London (12 miles north-east), City of Westminster (12 miles north), Marylebone (12 miles north), Kensington (11 miles north), St Pancras (13 miles north) and Shoreditch (14 miles north-east).

Landmarks near Cheam

Typical jobs here are in homes near Avenue Primary Academy, Howell Hill and Overton Grange School, among other places. The closest station to Cheam is Cheam station, about 0.6 miles north. Other landmarks nearby include The Ashley Centre (2.7 miles south-west) and Chessington Castle Hill (3.5 miles west). For a walk, there’s Duppas Hill and Belmont Pastures.

Map of Cheam © OpenStreetMap contributors

Honest limits

Honest advice matters more to us than a booking, so here’s what new sealant will not do:

  • A wall that is not a fire-resisting element to begin with
  • Sign-off of the building, which sits with building control or your assessor
  • Doors that are not fire doors in the first place

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

What we seal

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

Cheam questions

Can parking be tricky for a visit in Cheam?

It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.

Can you do fire rated sealant in Cheam?

Yes, Cheam is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing.

Do you have insurance?

Yes. We’re fully insured, and we have been doing sealant work for more than 20 years.

Can I use normal mastic around a pipe through a fire wall?

No. Where a fire-rated seal is needed, it has to be a product tested for that use fitted to the maker’s details.

Can I add another job to the visit?

Yes. Just list everything you need and you’ll get one quote.

What does intumescent mean?

An intumescent material expands when it’s heated. Many fire-rated sealants work this way, but not all and which one is used depends on the job.

Is it worth trying it myself?

For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.

Is there a guarantee?

Yes, always. Each job is guaranteed for twelve months, wherever you are.

Quotes for fire rated sealant in Cheam

For a quick quote, just ask. What matters most is:

  • The old material and how stubborn it is
  • Mould in or behind the old joints
  • Working hours on commercial sites
  • The number and length of the joints

Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.

Asking for a quote

What to tell us when you ask for a quote:

  • Pictures of the joints, sent by email
  • What’s wrong with the joints now
  • Access, such as stairs, a lift or height
  • Where the property is

Asking for a quote is easy: tell us what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we will come back to you with a quote.

How the job changes by surface

Masonry and concrete

Preparation counts on brick, block and concrete. We brush and vacuum the gap and use backing where the detail needs it before the sealant goes in.

Service penetrations

Different services need different details: metal pipes, cables and plastic pipes aren’t treated the same. We follow the manufacturer’s tested detail for each, and tell you if sealant alone is not the right fix.

How it works

We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours for a handful of gaps, and longer for a whole building, and the area is left clean. For a job in Cheam, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.

  1. We plan the order of work and access, floor by floor or flat by flat.
  2. We take out any damaged or unsuitable sealant.
  3. Gaps are cleaned of dust and loose material.
  4. We apply and tool the sealant to the product’s tested detail.
  5. We record what was done and flag anything that needs a different system.

Preparing for the visit

  • Mention any tricky access
  • For indoor joints, keep the area dry beforehand if you can
  • For business premises, tell us about site rules or sign-in

Get a quote

There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or send us an email.

Ask for a quote

Related advice

DIY sealant or a professional job?

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 does not work out, we can still put it right.

A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.

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