Greater London · England
Fire Rated Sealant in Walworth
Problem with your fire-stopping gaps in Walworth? We remove the old material, prepare the joints and seal them properly.
- Seals cut through by electricians, plumbers or data installers
- Gaps around pipes and cables through fire-resisting walls
- Gaps flagged on a fire risk assessment
The process
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the work takes a few hours for a handful of gaps, and longer for a whole building in most cases. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We go through the gaps on your list or survey and check each one’s size and substrate.
- We remove any old or unsuitable filler and clean the gap.
- Where the tested detail needs backing or fill, we fit it.
- Fire-rated or intumescent sealant is applied to the right depth and tooled.
- Finally, we list where we worked and what we used, for your records.
Preparing for the visit
- Mention any parking rules near the property
- Tell us about any water getting in
- For business premises, tell us about site rules or sign-in
Get a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job.
Advice
Fire rated sealant in Walworth
A fire seal relies on being installed the way it was tested: the right depth, the right backing and the right product for the substrate. That’s the part we focus on, one gap at a time. If you are dealing with unsealed gaps where pipes and cables go through a wall and old fire sealant that has split or come away, we can help.
Across London, offices, shops, hotels, student halls and blocks of flats all need sealant work from time to time, whether that’s washroom resealing or fire-rated sealant around service openings. Where a building in Walworth needs to stay open, work can be planned outside normal hours.
Every job comes with our 12-month guarantee.
- Where
- Walworth (SE1P, SE17, SE1)
- Wider area
- Greater London
- Cover
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Places near Walworth
What else we do in Walworth
What affects the quote in Walworth
For a quick quote, just ask. The main things that affect it are:
- How easy the joints are to reach
- The number of rooms or windows
- The number and length of the joints
- The type of sealant required
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What we need to know
To make quoting easier, please include:
- How we’d reach the joints
- A few photos by email, if you can
- The rough size of the job
- The problem you’ve noticed
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Commercial buildings in Walworth
Many London buildings have tight access and loading restrictions, so out-of-hours working can be arranged where needed. 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, which is often where open fire-stopping gaps are first noticed. We work to the specification you’re given, installing the product to its tested details.
As a London address, Walworth can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. If you look after a building such as Robert Browning Primary School, fire-stopping around service openings should be restored whenever new services go in.
Walworth is about 1 mile south of London, in Greater London. Anywhere in SE1P, we cover fire rated sealant for homes and businesses. We cover 764 towns and villages across Greater London.
Our applicators cover all of SE1P, SE17 and SE1 for fire rated sealant and the streets around it. If you need fire rated sealant at a property on Mina Road, Ash Avenue and Angel Lane or a nearby road, we can help. Nearby, we also carry out fire rated sealant in London (1 mile north), Bermondsey (1 mile north-east), Camberwell (1 mile south), South Bermondsey (1 mile east) and Denmark Hill (2 miles south). Larger places within reach include City of Westminster (3 miles north-west), Marylebone (3 miles north-west), Kensington (5 miles west), St Pancras (3 miles north-west), Shoreditch (3 miles north) and Walthamstow (7 miles north-east).
Around Walworth
We work in homes and buildings around University Academy of Engineering South Bank, Nursery Row Park and Lord Nelson pub. Other local landmarks include Lambeth Palace Library (1.3 miles north-west) and St Saviour's and St Olave's Church of England School (under half a mile north). The nearest railway station is Elephant & Castle station, about 0.5 miles north-west. Well-known places in the area include Gabriel's Wharf (1.5 miles north-west) and The Walworth Clinic (less than half a mile west). Open spaces near Walworth include Bellenden Road Nature Garden and St. James's Park Lake.
When to call us in Walworth
Much fire stopping is hidden: above ceilings, inside risers and behind panels. Out of view, damage sits unnoticed until someone inspects.
People normally contact us after spotting one of these:
- Gaps where walls meet ceilings or slabs
- Holes left by a change of layout
- Joints picked up in a fire-stopping survey
- Door frames with gaps between frame and wall
For buildings such as Lady Margaret Church, older buildings that have had new heating or wiring often have service gaps worth checking.
What your quote should include
- Is the old sealant removed completely?
- How hidden problems are handled
- How the surfaces are prepared before sealing
- What guarantee comes with the work
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Store the list of sealed gaps with your building paperwork
- Ask which product was used before you paint
- Plan fire stopping into any work that goes through walls or floors
- Never patch a fire seal with standard sealant
Avoid covering a sealed gap with anything that is not part of the tested detail. If it needs repair, use the same type of product. We can tell you which product we used.
It’s easiest to seal gaps while they’re few and easy to reach. Over time, more work adds more holes and the job gets bigger.
When something else is needed
New sealant can’t fix everything, and we will tell you before work begins. It will not solve:
- Walls or floors that weren’t built to resist fire
- Fire doors that need new seals, closers or hardware
- Large holes that need a different fire-stopping system
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think before booking.
What we seal
- Linear gaps
- Pipe & cable gaps
- Plasterboard & masonry
- Door frames
- Flats & HMOs
- Service penetrations
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Questions from Walworth
Is parking a problem for a job in Walworth?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Do you work for landlords with property near Elephant & Castle station?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will send you a clear quote.
Do I need to be at home?
It depends on the job. Inside work needs someone to give us access.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Can I use normal mastic around a pipe through a fire wall?
No. Standard sealants are not made or tested to stop fire. If it’s been used, we remove it and use the right product.
Can I choose the sealant colour?
Most of the time, yes. We’ll explain which colours are available and agree one before any work starts.
Are you fully insured?
Yes. We’re fully insured.
Do you work in Walworth?
Yes. We work in Walworth, as part of our work across South East England, London and Scotland. To book, ring 0345 464 0079 or send us an email.