Greater London · England
Fire-rated sealant in West Dulwich, Greater London
Intumescent and fire-rated sealant around gaps, frames and service penetrations for householders, landlords and businesses in West Dulwich. Fully insured, ARBOMaster approved and guaranteed for a year.
- Joints picked up in a fire-stopping survey
- Standard silicone or caulk in a fire-stopping gap
- Unsealed gaps around fire door frames
What sealant work cannot fix
Sealant isn’t the answer to every problem, and we’d rather say so up front. It won’t solve:
- Problems with the door itself rather than the gap around the frame
- Sign-off of the building, which sits with building control or your assessor
- Construction that doesn’t provide fire resistance on its own
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think before you book.
Where we work in West Dulwich
- Flats & HMOs
- Service penetrations
- Linear gaps
- Plasterboard & masonry
- Door frames
- Pipe & cable gaps
Fire rated sealant for homes and businesses in West Dulwich
We don’t assess buildings or decide what fire stopping is needed; 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. If you’re dealing with fire stopping disturbed by later work and sealant items on a fire risk assessment action list, we can help, whatever the surface.
London blocks of flats carry pipes and cables through walls and floors in their common parts and service risers. For managing agents and building owners in West Dulwich, that can mean fire-rated sealant around service openings as well as resealing in shared washrooms and kitchens.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we will put it right.
- Where
- West Dulwich (SE21, SE27, SE19)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
West Dulwich questions
Do you work for hotels and guest houses in West Dulwich?
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.
Can parking be tricky for a visit in West Dulwich?
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 in West Dulwich?
We do. West Dulwich is part of the area we cover.
Can I choose the sealant colour?
We help you choose a colour that suits, from white and clear to greys and other shades. The choice depends on the product the joint needs.
Do you guarantee your work?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we’ll put it right.
Do you remove the old sealant?
Yes, always, and completely. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Are you fully insured?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
What do you put in the joint?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Do you need fire rated sealant in West Dulwich?
In some buildings the gap was filled with the wrong thing in the first place: general-purpose foam, everyday silicone or caulk in a place that needed a tested fire seal. It may look fine, but it isn’t a fire-rated seal.
Look out for these signs:
- Joints picked up in a fire-stopping survey
- Standard silicone or caulk in a fire-stopping gap
- Old fire sealant that has split or come away
- Open holes round services passing through fire walls
Managing a site like Dulwich Wood Primary School? Then service openings in fire-resisting walls need checking after any refurbishment.
What your quote should include
- What insurance they hold
- What happens if they find a problem under the old sealant
- What guarantee comes with the work
- Who turns up on the day
Also near West Dulwich
Also in West Dulwich
What the job involves on each surface
Plasterboard walls
Many fire-resisting walls in flats, offices and conversions are plasterboard. We use a product tested in that kind of wall for the gap we are sealing.
Masonry and concrete
For masonry and concrete, we use a product tested in that substrate. The gap is cleaned of dust first so the seal has something sound to bond to.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Fire rated sealant in West Dulwich: local notes
Many London buildings have tight access and loading restrictions, and out-of-hours working is possible to arrange. West Dulwich has hotels and guest accommodation in and around it. Hotel work can be planned room by room, with out-of-hours working where needed.
As a London address, West Dulwich can be tricky for parking: let us know about parking bays, permits or a driveway. If you let a flat or house near Sydenham Hill station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
West Dulwich is about 1 mile north-east of West Norwood, in Greater London. Whether you’re in the middle of West Dulwich or further out, fire rated sealant is available for homes and businesses alike. West Dulwich is one of 764 towns and villages in Greater London where we work.
We work across SE21, SE27 and SE19 for fire rated sealant and the streets around it. That includes homes and businesses on Berry Lane, Clive Road and Myton Road and the roads around them. Main roads around West Dulwich include the A2199, which makes travel easy. We also cover the places around West Dulwich: Sydenham Hill (1 mile east), West Norwood (1 mile south-west), Gipsy Hill (1 mile south), Dulwich (1 mile north) and Upper Norwood (1 mile south). We also work in nearby towns such as London (5 miles north), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (7 miles north-west), St Pancras (7 miles north) and Shoreditch (6 miles north).
Around West Dulwich
In West Dulwich, that means homes and buildings near The Wood House, Dulwich Prep & Senior and Kingsdale Foundation School and the streets around them. West Dulwich has its own railway station: Sydenham Hill station. Nearby you’ll also find British Vintage Wireless And Television Museum (within half a mile west) and St Christopher's Hospice (1.3 miles south-east). For a walk, there’s Battersea Park Lake and Dulwich Upper Wood.
Landlords, agents and businesses in West Dulwich
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Why it’s worth doing now in West Dulwich
Fire-rated sealants are less forgiving than ordinary ones. Depth, backing and surface preparation all affect how a seal performs, and we work to the product details every time. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble for homes in West Dulwich.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
What you get with us
- 20+ years of sealant experience
- Arbo and Everbuild products
- Every job guaranteed for a year
- Domestic, commercial and hotel work
What happens on the day
When we arrive, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before we start. The work normally takes a few hours for a handful of gaps, and longer for a whole building. In West Dulwich, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We begin by agreeing the list of gaps from your assessor’s or designer’s requirements.
- We measure every gap and note what it’s in and what passes through.
- Any non-fire-rated filler is removed and the gap cleaned.
- The specified fire-rated sealant goes in over any backing its detail requires.
- We hand over a list of locations and products for your records.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Keep children and pets away from the work area
- Clear items away from the joints we are working on
Ask for a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.