Greater London · England
Fire-rated sealant in Hither Green, Greater London
Our applicators work in Hither Green on intumescent and fire-rated sealant around gaps, frames and service penetrations. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Old fire sealant that has split or come away
- Seals cut through by electricians, plumbers or data installers
- Open holes round services passing through fire walls
Fire rated sealant for homes and businesses in Hither Green
We do not assess buildings or decide what fire stopping is needed; your assessor, designer or building control sets that out. What we do is apply the right product to that specification, properly and neatly. Common call-outs are for old fire sealant that has split or come away and gaps filled with a product that isn’t fire-rated, on linear gaps, flats & HMOs and pipe & cable gaps.
Across London, offices, shops, hotels, student halls and blocks of flats all need sealant work from time to time, from washroom silicone to fire-rated sealant around pipes and cables passing through walls. Where a building in Hither Green needs to stay open, work can be planned outside normal hours.
Your job is guaranteed for a year, as with all our work.
- Where
- Hither Green (SE13, SE12, SE6)
- Region
- Greater London
- Cover
- A year, on every job
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Your questions about fire rated sealant in Hither Green
Do you work for hotels and guest houses in Hither Green?
Yes, we work for hotels as well as homes and businesses. A room-by-room programme keeps most rooms in use while the work goes on.
Is parking an issue for fire rated sealant in Hither Green?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Will you assess my building’s fire safety?
No. Your fire risk assessor, designer or building control decides that. Our job is applying the sealant to their specification.
Can new sealant go over the old?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
How much does fire rated sealant cost in Hither Green?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Can I choose the sealant colour?
We’ll suggest a colour to suit the surroundings, from white and clear to greys and other shades. The choice depends on the product the joint needs.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it doesn’t work out, we can redo it.
Surface by surface
Flats and HMOs
In occupied buildings, we plan the order of work with you. We agree access to each flat and the common parts before we start.
Plasterboard walls
Many fire-resisting walls in flats, offices and conversions are plasterboard. We use a product tested in that kind of wall.
Work for landlords, hotels and businesses
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured for the work.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Don’t fill fire-stopping gaps with ordinary foam or silicone
- Get damaged fire seals looked at promptly
- File the fire-stopping record where your assessor can find it
- Ask which product was used before you paint
Tell other trades that the gaps have been sealed, and make sure anything they disturb is resealed with a suitable product. A lot of damaged fire stopping comes from later work.
If a fire risk assessment has flagged a gap, do not leave it for the next one. Have it sealed, then keep the record so you can show it was dealt with.
DIY versus a professional finish
If you’ve already had a go yourself, that is fine. We cut it out and start again.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Other services in Hither Green
What we are called out for in Hither Green
Lots of unsealed gaps appear long after the building was completed. Electricians, plumbers and data installers drill through walls and ceilings and the hole round the new service isn’t always sealed again.
Look out for these signs:
- Cracked or shrunken fire-rated sealant
- Gaps left after a refit or conversion
- Joints picked up in a fire-stopping survey
- Gaps around pipes and cables through fire-resisting walls
Schools such as Brindishe Manor School are buildings too, and fire-stopping around service openings should be restored whenever new services go in.
Before booking anyone
- How long to leave it before use
- What happens if they find a problem under the old sealant
- What guarantee comes with the work
- Who does the work, and how experienced they are
Commercial buildings in Hither Green
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 apply fire-rated sealant to the assessor’s or designer’s specification and the product’s tested details. 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 Hither Green station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant. As a London address, Hither Green can be tricky for parking: let us know about parking bays, permits or a driveway.
Hither Green is about 2 miles south-east of New Cross, in Greater London. We carry out fire rated sealant for homes and businesses in Hither Green, as part of our work across Greater London. We cover 764 towns and villages across Greater London.
All of SE13, SE12 and SE6 is covered for fire rated sealant. If you need fire rated sealant at a property on Old Road, Manor Lane and Pascoe Road or a nearby road, our applicators can take on the job. If you’re just outside Hither Green, we cover Lee (1 mile east), Ladywell (1 mile west), Lewisham (1 mile north-west), Catford (1 mile south-west) and Horn Park (1 mile east). Further out, we also cover London (5 miles north-west), City of Westminster (8 miles north-west), Marylebone (8 miles north-west), Kensington (9 miles west), St Pancras (7 miles north-west) and Shoreditch (6 miles north-west).
What’s near Hither Green
Locally, jobs take us to homes and businesses close to International Academy of Greenwich, The Edmund Halley pub and Manor House Gardens. Hither Green has its own railway station: Hither Green station. A little further out are Lewisham Shopping Centre (0.9 miles north-west) and University Hospital Lewisham (0.7 miles west). For a walk, there’s Brookmill Road Local Nature Reserve and Summer Hill.
Leave it or put it right?
Fire-rated sealants are less forgiving than ordinary ones. How it’s installed changes how it performs, and we work to the product details every time. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Hither Green, the repair is bigger than the sealant job would have been.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
Why choose Mr Mastic in Hither Green
- More than 20 years in sealant work
- 180+ five-star Google reviews
- Anti-fungal sanitary silicone in wet areas
- Quality sealants from Arbo and Everbuild
Take a look at what affects the cost or what customers say.
How it works
When we arrive, we look over the joints with you first, so you know exactly what we are doing. We protect the surfaces around the joints before any work begins. Most jobs take from a few hours to a few days, depending on the number of gaps and the access. 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.
- Access to each area is agreed so the work can run in order.
- 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
- Mention any sign-in or site rules at work premises
- Let us know about stairs, lifts or work at height
- Let us know if you’ve seen damp or leaks
Getting a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that’s easy.