Greater London · England
Fire-rated sealant in Forest Hill, Greater London
We cover Forest Hill for intumescent and fire-rated sealant around gaps, frames and service penetrations. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Open joints along the top of partitions
- Joints picked up in a fire-stopping survey
- Seals cut through by electricians, plumbers or data installers
Landlords, agents and businesses in Forest Hill
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Fire rated sealant in Forest Hill
Deciding which gaps need fire stopping isn’t our role; that comes from your fire risk assessor, designer or building control. Our part is applying the specified sealant carefully, to the right depth and with the right backing. We work on linear gaps, service penetrations and pipe & cable gaps, and common reasons people get in touch are fire seals that have cracked with movement and open gaps behind door architraves.
In London’s blocks of flats, service risers and common parts have pipes and cables passing through walls and floors. In Forest Hill, building managers may need both fire-rated sealant around those openings and new sealant in shared washrooms.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Forest Hill (SE23, SE22, SE26)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
Every visit runs the same way: we check the joints, protect the area around them, carry out the job and clear up. It normally takes 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. Mention any building rules, key holders or managing agents when you book.
- Before starting, we go through the specification or action list with you.
- We measure every gap and note what it’s in and what passes through.
- Any non-fire-rated filler is removed and the faces cleaned.
- The specified fire-rated sealant goes in over any backing its detail requires.
- Every location is recorded with the product used.
How to prepare
- Mention any tricky access
- Clear items away from the joints we’re working on
- Mention if the joints have been sealed before
Ask for a quote
Every job is quoted individually. Simply phone 0345 464 0079 or send us an email and describe the job.
Related advice
Nearby places to Forest Hill
Other services in Forest Hill
Your questions about fire rated sealant in Forest Hill
Is parking a problem for a job in Forest Hill?
Parking in Forest Hill, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Is Forest Hill in your area for fire rated sealant?
Yes, Forest Hill is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing.
How do I get a quote for fire rated sealant in Forest Hill?
Size, access and the old material all affect the cost. Ask us for a quote.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. Then phone 0345 464 0079 or send us an email.
Do the sealants smell?
That depends on the sealant. Some smell for a while, some hardly at all.
Can I add another job to the visit?
Of course. Combining jobs makes good use of the visit.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Forest Hill.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
Aftercare tips
Looking after new joints is easy:
- Store the list of sealed gaps with your building paperwork
- Tell trades working in the building that fire seals must be put back
- Look in service cupboards and ceiling voids from time to time
- Ask which product was used before you paint
Leave the sealant to cure fully before painting near it. Not every fire-rated sealant takes paint and we’ll tell you which one you have.
Open gaps do not only matter in a fire: they also let noise, draughts and sometimes pests through. Sealing them early helps on every front.
What fire rated sealant looks like in Forest Hill
Many London buildings have tight access and loading restrictions, so out-of-hours working can be arranged where needed. Workplaces and the common parts of blocks of flats in England need a fire risk assessment under the Regulatory Reform (Fire Safety) Order 2005, which is often where open fire-stopping gaps are first noticed. We apply fire-rated sealant to the assessor’s or designer’s specification and the product’s tested details.
Schools such as Fairlawn Primary School are buildings too, and gaps opened by contractors for new cabling are a common finding in schools and offices. Community buildings like Honor Oak Christian Fellowship Centre are part of the picture too: older buildings that have had new heating or wiring often have service gaps worth checking.
Forest Hill is about 2 miles south-east of East Dulwich, in Greater London. We provide fire rated sealant to homes and businesses in Forest Hill and nearby, as part of our work across Greater London. We cover 764 towns and villages across Greater London.
All of SE23, SE22 and SE26 is covered for fire rated sealant, from the main roads to the quietest streets. Whether your property is on Ewart Road, London Road and Rojack Road or anywhere close by, our applicators can take on the job. Close by, we work in Honor Oak (1 mile north), Perry Vale (1 mile south-east), Brockley (1 mile north-east), Crofton Park (1 mile north-east) and Dulwich (1 mile west). We also work in nearby towns such as London (4 miles north-west), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (7 miles north-west), St Pancras (6 miles north-west) and Shoreditch (6 miles north).
Near you in Forest Hill
Around Forest Hill, our work takes us to homes and buildings near Allenby Tutorial Trust, Capitol Cinema pub and Harris Girls' Academy East Dulwich. The closest station to Forest Hill is Honor Oak Park station, about 0.5 miles north-east of the centre. A little further out are Greenwich Castle (3.1 miles north-east) and Horniman Museum and Gardens (0.5 miles south-west). Not far away are One Tree Hill and Knight's Hill.
Signs you need fire rated sealant in Forest Hill
Lots of unsealed gaps appear long after the building was completed. New cables, pipes and data runs go through walls and ceilings and the hole they leave doesn’t always get resealed.
The most common problems we see are:
- Standard silicone or caulk in a fire-stopping gap
- Open joints along the top of partitions
- Unsealed gaps around fire door frames
- Gaps around pipes and cables through fire-resisting walls
Rented homes near Honor Oak Park station change hands often, and fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through.
Before booking anyone
- How long to leave it before use
- Who does the work, and how experienced they are
- Is VAT in the price?
- Which sealant they’ll use, and why
What the job involves on each surface
Plasterboard walls
Holes in plasterboard are often cut roughly for services. Gaps that are too big for sealant alone need a different detail and we’ll flag it.
Flats and HMOs
Flats and HMOs rely on fire separation between homes and the common parts. We work through the gaps on your assessment.
When something else is needed
In fairness, some problems need a different trade:
- Doors that aren’t fire doors in the first place
- Certifying a building or signing off its fire safety
- Assessing a building’s fire safety
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Plasterboard & masonry
- Pipe & cable gaps
- Door frames
- Flats & HMOs
- Linear gaps
- Service penetrations
Should I try it myself 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.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.