Greater London · England
Fire-rated sealant in Southfields, Greater London
Intumescent and fire-rated sealant around gaps, frames and service penetrations for homes and businesses in Southfields and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Sealant items on a fire risk assessment action list
- Holes left by a change of layout
- Standard silicone or caulk in a fire-stopping gap
What happens if it’s left?
Sealant is not the fix for every opening. Big openings, bundles of cables and plastic pipes may need batts, collars or wraps instead. If a gap is not suitable for sealant, we’ll tell you. In a flat in Southfields, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
What you get with us
- Quality sealants from Arbo and Everbuild
- Sanitary silicone with an anti-fungal additive in wet areas
- Experience in homes, commercial sites and hotels
- ARBOMaster approved applicator
Take a look at what affects the cost and customer reviews.
About our fire rated sealant in Southfields
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, and we can record what went where. If you are dealing with old fire sealant that has split or come away and fire stopping disturbed by later work, we can put it right.
London blocks of flats carry pipes and cables through walls and floors in their common parts and service risers. In Southfields, building managers may need both fire-rated sealant around those openings and new sealant in shared washrooms.
We stand behind the work with a one-year guarantee, so you are not left on your own once the job is done.
- Where
- Southfields (SW18, SW19, SW17)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Landlord and commercial work in Southfields
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
Commercial buildings in Southfields
Many London buildings have tight access and loading restrictions, and out-of-hours working is possible to arrange. 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.
For buildings such as St John the Divine, gaps around pipes and cables are worth checking after any building work there. If you let a flat or house near Earlsfield station, fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through. For site and facilities teams at buildings such as Floreat Wandsworth Primary School, service openings in fire-resisting walls need checking after any refurbishment.
Southfields is about 2 miles north-east of Wimbledon, in Greater London. If you need fire rated sealant in Southfields, please ring 0345 464 0079 or drop us an email for a quick quote. We cover Greater London from our Crawley base. 764 places in Greater London are on our list, large and small. Our London page covers work nearby (6 miles or so).
We work across the SW18, SW19 and SW17 postcode area for fire rated sealant and the streets around it. You will find streets such as Burr Road, Acuba Road and Mount Road, all of which we cover. We also cover the places around Southfields: Earlsfield (1 mile south-east), Wandsworth (1 mile north), Summerstown (1 mile south), Battersea (2 miles north-east) and Clapham Junction (2 miles north-east). We also work in nearby towns such as London (6 miles north-east), City of Westminster (5 miles north), Marylebone (5 miles north), Kensington (4 miles north), St Pancras (6 miles north-east) and Shoreditch (7 miles north-east).
Around Southfields
We work in homes and buildings around Old Sergeant pub, Southfields Academy and Wandsworth School and the streets around them. There’s a railway station in Southfields itself: Earlsfield station. Other landmarks nearby include Royal Hospital for Neuro-disability (1 mile west) and Wimbledon Lawn Tennis Museum (1.2 miles south-west). For a walk, there’s Henman Hill and Wandle Meadow Nature Park.
Different surfaces, different methods
Masonry and concrete
Holes through concrete and block are rarely neat. We check the gap size around the service against the product’s tested range.
Plasterboard walls
Plasterboard partitions are common in flats, offices and conversions. We use a product tested in that kind of wall.
Nearby places to Southfields
More services for Southfields
When something else is needed
It helps to know what we can’t do too:
- Walls or floors that weren’t built to resist fire
- Assessing a building’s fire safety
- Sign-off of the building, which sits with building control or your assessor
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think before you book.
Surfaces we seal
- Service penetrations
- Pipe & cable gaps
- Plasterboard & masonry
- Flats & HMOs
- Linear gaps
- Door frames
Aftercare tips
So the new joints stay in good condition:
- Report cracked or damaged seals as soon as you notice them
- Keep general-purpose foam and caulk away from fire-stopping gaps
- Ask which product was used before you paint
- Make resealing part of every contractor’s brief
Follow the cure time we give you before decorating over the sealant. Some fire-rated sealants can be painted and some can’t, so ask us which we used.
When you plan work that goes through walls or ceilings, plan the fire stopping too. Catching it then saves a separate visit later.
Common questions in Southfields
Can parking be tricky for a visit in Southfields?
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.
Do you work for landlords with property near Earlsfield station?
Yes. We work for landlords and letting agents as well as homeowners. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Can you give us a record of the work?
Yes. When the job is done, we give you the locations and products. If you need pictures or a set layout, ask when you get a quote.
Where do you work from?
Mr Mastic is based in Crawley. We cover Southfields and the rest of Greater London.
How long does fire rated sealant take?
Typically it takes a few hours for a handful of gaps, and longer for a whole building. Larger jobs naturally take longer, and we will tell you how long to expect.
What do you put in the joint?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll explain our choice.
What affects the cost of fire rated sealant
We do not publish a price list, because jobs vary so much. What we look at:
- Any working-time requirements on site
- How much old sealant there is and how hard it is to remove
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email.
What to tell us for a quote
Before you ask for a quote, have a think about:
- The problem you’ve noticed
- Whether it’s a home or a business
- Pictures of the joints, sent by email
- Any previous sealing or DIY work
Every job is quoted individually. Just phone 0345 464 0079 or drop us an email with the details.
How the visit works
You don’t need to clear the whole room or building, only the area right around the joints. We protect the rest, and the job takes from a few hours to a few days, depending on the number of gaps and the access for a typical job. In a London area like Southfields, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We plan the order of work and access, floor by floor or flat by flat.
- We take out any damaged or unsuitable sealant.
- Dust and loose debris are cleaned from each gap.
- We apply and tool the sealant to the product’s tested detail.
- Locations and products are written up and any gaps unsuitable for sealant are flagged.
How to prepare
- Clear the area around the work
- Let us know about stairs, lifts or work at height
- Tell us if parking is tricky
Get a quote
We do not publish a price list. Instead, we give you a clear quote for your job. To arrange one, ring 0345 464 0079 or drop us an email.