Greater London · England
Fire-rated sealant in South Croydon, Greater London
We cover South Croydon for intumescent and fire-rated sealant around gaps, frames and service penetrations. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Fire stopping disturbed by later work
- Old fire sealant that has split or come away
- Open holes round services passing through fire walls
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Fire rated sealant in South Croydon
Landlords, managing agents and facilities teams use us for the sealant items on a fire risk assessment on buildings across South Croydon. If you share the list, we can quote for the gaps that need fire-rated sealant. If you are dealing with gaps around pipes and cables through fire-resisting walls and fire stopping disturbed by later work, we can help, on plasterboard & masonry, linear gaps and flats & HMOs alike.
In London, a commercial job often starts with access: loading bays, building rules and lifts. For a building in South Croydon, we agree timings and access before anything starts, and room-by-room programmes can be planned where needed.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- South Croydon (CR2, CR8, CR0)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What happens on the day
On the day, there’s very little for you to do. Show us the job and we will take it from there. The job generally takes from a few hours to a few days, depending on the number of gaps and the access, including the tidy-up. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in South Croydon. It helps if you can point us to a visitor permit or a bay close to the door.
- We start with the survey or action list, checking the size and surfaces of every gap.
- Anything that isn’t fit for the job comes out, and the gap is cleaned.
- We put in whatever backing or fill the product detail specifies.
- We apply the fire-rated or intumescent sealant to the specified depth and tool it.
- Finally, we list where we worked and what we used, for your records.
How to prepare
- Mention any leaks or damp you’ve noticed
- Let us know about parking restrictions
- Try not to wet indoor joints just before the visit
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, and email photos if that is easy.
Read more
Quotes for fire rated sealant in South Croydon
Every job gets its own quote. This is what makes a difference:
- How much there is to do
- Any mould that needs treating
- Any working-time requirements on site
- Whether old sealant or filler has to be cut out
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first.
Asking for a quote
When you call or email, it’s useful to know:
- Photos by email, if that is easy
- The rough size of the job
- Whether it has been sealed before
- Any access issues, like height or stairs
Want a quote for fire rated sealant? Please call 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Nearby places to South Croydon
Other services in South Croydon
What happens if it’s left?
Fire-rated sealants need more care than everyday sealant. How it’s installed changes how it performs, and we work to the product details every time. In a flat in South Croydon, 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.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Why choose Mr Mastic in South Croydon
- Fully insured
- We leave the area clean and tidy
- 20+ years of sealant experience
- Sanitary silicone with an anti-fungal additive in wet areas
See our cost guide and what customers say.
Different surfaces, different methods
Masonry and concrete
Masonry is dusty and porous, so preparation matters. The gap is cleaned and backed where required.
Flats and HMOs
Conversions normally leave a mix of old and new service holes. The gaps on your list are sealed with a fire-rated product.
Common questions in South Croydon
Can parking be tricky for a visit in South Croydon?
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 work in hotels near South Croydon?
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 take out the old sealant first?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
How do I get a quote for fire rated sealant in South Croydon?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before work begins.
Can I choose the sealant colour?
In most cases you can choose. We will tell you which colours the right product comes in.
Do I have to be there?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Can tenants book the work?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Fire rated sealant around South Croydon
Many London buildings have tight access and loading restrictions, and out-of-hours working is possible to arrange. South Croydon has hotels and guest accommodation in and around it. Hotel work can be planned room by room, with out-of-hours working where needed.
Community buildings like Church of St Augustine are part of the picture too: service openings in its walls need the right fire-rated sealant, as in any building. If you look after a building such as Purley Oaks Primary School, gaps opened by contractors for new cabling are a common finding in schools and offices.
South Croydon is about 1 mile south of Croydon, in Greater London. Homes, rented property, offices and hotels in South Croydon can book us for fire rated sealant. The work is guaranteed for a year. Our area takes in 764 places across Greater London, large and small. London is on our list too, around 10 miles away.
All of CR2, CR8 and CR0 is within our area for fire rated sealant. Whether your property is on Edgar Road, Bynes Road and Grange Road or anywhere close by, our applicators can take on the job. Nearby, we also carry out fire rated sealant in Croydon (1 mile north), Coombe (1 mile north-east), Sanderstead (1 mile south-east), Riddlesdown (2 miles south) and Selsdon (2 miles east). Larger places within reach include London (10 miles north), City of Westminster (11 miles north), Marylebone (12 miles north), Kensington (11 miles north-west), St Pancras (12 miles north) and Shoreditch (12 miles north).
Local landmarks in South Croydon
Locally, jobs take us to homes and businesses close to The Purley Arms, Harris Academy Purley and Duppas Hill and the streets around them. South Croydon has its own railway station: Sanderstead station. A little further out are Purley War Memorial Hospital (1.2 miles south-west) and Croydon Airport Visitor Centre (1 mile west). Open spaces near South Croydon include Roundshaw Downs and Duppas Hill.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Check risers, ceiling voids and cupboards during building checks
- Store the list of sealed gaps with your building paperwork
- Include fire stopping when you schedule refits
- Check whether a sealant can be painted before decorating over it
Any fire seal that is 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.
A flagged gap shouldn’t wait for the next assessment. Have it sealed, then keep the record so you can show it was dealt with.
Signs you need fire rated sealant in South Croydon
Movement in the structure can open gaps too: cracked or debonded sealant leaves an open route through the wall. Damage from cleaning, knocks and maintenance adds to it.
Most people get in touch when they notice something like this:
- Gaps where walls meet ceilings or slabs
- Fire stopping disturbed by later work
- New service routes left unsealed after building work
- Door frames with gaps between frame and wall
As a London address, South Croydon can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Before you book anyone
- How the colour is chosen
- Is VAT in the price?
- When the joint can take water or movement
- Whether they seal over old material or remove it