Greater London · England

Fire-rated sealant in South Norwood, Greater London

Intumescent and fire-rated sealant around gaps, frames and service penetrations for homes and businesses in South Norwood and across Greater London. ARBOMaster approved applicators, fully insured, with a one-year guarantee.

  • Fire seals that have cracked with movement
  • Fire stopping disturbed by later work
  • Open gaps behind door architraves

Need fire rated sealant in South Norwood?

How the job changes by surface

Flats and HMOs

In flats and HMOs, the walls and floors between homes and common areas need sealing where services pass through. We work through the gaps on your assessment, flat by flat if needed.

Plasterboard walls

In plasterboard walls, the condition of the board edge matters. Loose material is removed so the sealant has a firm edge.

How we handle fire rated sealant in South Norwood

Where services or frames pass through a fire-resisting wall or floor, the gap around them needs a fire-rated seal. We apply intumescent and fire-rated sealants to the manufacturer’s tested details for each gap, with a record of the products and locations if you need one. We work on plasterboard & masonry, pipe & cable gaps and flats & HMOs, and the jobs we see most are gaps where walls meet ceilings or slabs and standard silicone or caulk in a fire-stopping gap.

London’s offices, shops, hotels, student accommodation and blocks of flats all have joints to look after, from washroom silicone to fire-rated sealant around pipes and cables passing through walls. Out-of-hours working can be arranged where a building in South Norwood cannot close.

Every job comes with a 12-month guarantee.

Eleven members of the Mr Mastic team standing in front of branded white vans
Where
South Norwood (SE25, SE20, CR0)
Region
Greater London
Guarantee
12 months on all our work
Price
A clear quote up front
Phone
0345 464 0079
Page updated
26 October 2026

Landlords, agents and businesses in South Norwood

Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.

We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.

DIY sealant or a professional job?

Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.

Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.

Questions from South Norwood

Is parking an issue for fire rated sealant in South Norwood?

It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.

Do you take on hotel work around South Norwood?

Yes, hotels and guest houses are among the places we work. A room-by-room programme keeps most rooms in use while the work goes on.

Do you work in South Norwood?

Yes. We cover South Norwood. To book, call 0345 464 0079 or send us an email.

Do you offer different sealant colours?

Most of the time, yes. We’ll tell you which colours the right product comes in and agree one before we start.

Do you carry out fire risk assessments?

No. That is for a fire risk assessor, designer or building control. Our job is applying the sealant to their specification.

Do you do fire sealant around door frames?

Yes. The joint between frame and wall is sealed with a fire-rated sealant, to the product’s details. The door leaf and its hardware need a door specialist.

What do you put in the joint?

It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.

Do you guarantee your work?

Yes: twelve months. If there’s a problem with our work in that time, tell us and we’ll put it right.

Signs you need fire rated sealant in South Norwood

If the sealant is too shallow, has the wrong backing or sits on a dusty surface, it isn’t installed as tested. Rushed fire stopping is common, especially where it was squeezed in at the end of a project.

Any of these means the joints need attention:

  • Open gaps behind door architraves
  • Sealant items on a fire risk assessment action list
  • Gaps filled with a product that is not fire-rated
  • Unsealed gaps where pipes and cables go through a wall

As a London address, South Norwood can be tricky for parking: let us know about parking bays, permits or a driveway.

Comparing quotes

  • Are they insured?
  • Who turns up on the day
  • Which sealant they’ll use, and why
  • What happens if the job turns out different

Our hiring checklist

What sealant work cannot fix

Sealant is not the answer to every problem, and we will tell you before work begins. Sealant won’t put right:

  • Doors that are not fire doors in the first place
  • Deciding what fire stopping a building needs
  • Sign-off of the building, which sits with building control or your assessor

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

Surfaces we seal

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

Aftercare tips

Joint life depends on how it’s used and looked after. We suggest:

  • Check risers, ceiling voids and cupboards during building checks
  • Make resealing part of every contractor’s brief
  • Ask which product was used before you paint
  • Do not fill fire-stopping gaps with ordinary foam or silicone

Keep the record we give you with the building’s fire safety documents. It helps whoever checks the building next.

An open gap is not only a fire issue: noise, draughts and even pests can come through too. Sealing them early helps on every front.

Workplaces and buildings in South Norwood

There are hotels and other places to stay in and around South Norwood. Hotel work can be planned room by room, with out-of-hours working where needed. Commercial buildings in London often have strict access rules and limited loading, so out-of-hours working can be arranged where needed.

If you let a flat or house near Norwood Junction station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant. If you look after a church, hall or community building such as Church of St Mark, older buildings that have had new heating or wiring often have service gaps worth checking.

South Norwood is about 5 miles south-east of Stockwell, in Greater London. Jobs in South Norwood get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Our area takes in 764 places across Greater London. For nearby work, see our London page, about 7 miles away.

All of SE25, SE20 and CR0 is covered for fire rated sealant. If you need fire rated sealant at a property on Park Road, Court Road and Dixon Road or a nearby road, our applicators can take on the job. Main roads around South Norwood include the A213, which makes travel easy. If you’re just outside South Norwood, we cover Selhurst (1 mile north), Woodside (1 mile south), Ashburton (1 mile south), Elmers End (1 mile east) and Addiscombe (1 mile south). Further out, we also cover London (7 miles north), City of Westminster (9 miles north-west), Marylebone (9 miles north), Kensington (9 miles north-west), St Pancras (9 miles north) and Shoreditch (9 miles north).

Local landmarks in South Norwood

Typical jobs here are in homes near The Albion pub, South Norwood Recreation Ground and Harris Academy South Norwood, among other places. There’s a railway station in South Norwood itself: Norwood Junction station. A little further out are Croydon University Hospital (1.7 miles south-west) and Crystal Palace Museum (1.4 miles north). Not far away are Dulwich Upper Wood and Duppas Hill.

Map of South Norwood © OpenStreetMap contributors

How it works

All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. Once we have agreed what’s being done, we protect the area and start. It normally takes from a few hours to a few days, depending on the number of gaps and the access. In a London area like South Norwood, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.

  1. First we work through your list or survey, measuring each gap and checking what it’s formed in.
  2. Old or unsuitable sealant is cut out and the gap cleaned.
  3. Backing or fill is fitted where the product’s tested detail calls for it.
  4. We apply the fire-rated or intumescent sealant to the specified depth and tool it.
  5. Finally, we list where we worked and what we used, for your records.

Getting ready for the visit

  • Tell us about any water getting in
  • Let us know about parking restrictions
  • Clear items away from the joints we are working on

Ask for a quote

We quote each job on its own, so start by telling us what you need. Just ring 0345 464 0079 or send us an email with the details.

Ask for a quote

Advice

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