Greater London · England
Fire Rated Sealant in Isle of Dogs
Intumescent and fire-rated sealant around gaps, frames and service penetrations for homeowners, landlords and businesses in Isle of Dogs. Fully insured, ARBOMaster approved and guaranteed for a year.
- Fire stopping disturbed by later work
- Linear gaps at the head of walls
- Gaps left after a refit or conversion
Keeping the joints in good condition
After the cure time, these simple habits help:
- Check whether a sealant can be painted before decorating over it
- Photograph sealed gaps before they’re covered up
- Report cracked or damaged seals as soon as you notice them
- Include fire stopping when you schedule refits
Let contractors know where fire stopping has been done, and make sure anything they disturb is resealed with a suitable product. A lot of damaged fire stopping comes from later work.
Any job that breaks through a wall or ceiling should include resealing. Doing it at the time avoids leaving gaps behind.
Fire rated sealant in Isle of Dogs, done properly
We can work through a building room by room or floor by floor, noting the locations and products as we go. It gives you a list to keep with the building’s fire safety documents. Typical jobs include holes left by a change of layout and gaps filled with a product that isn’t fire-rated, across linear gaps, flats & HMOs and door frames.
In London, a commercial job often starts with access: loading bays, building rules and lifts. Timings and access are agreed with the building before work starts in Isle of Dogs.
A 12-month guarantee comes as standard, so you’re covered after we have gone.
- Where
- Isle of Dogs (E14, SE8, SE10)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What fire rated sealant looks like in Isle of Dogs
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, 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.
Community buildings like Church of St Nicholas are part of the picture too: service openings in its walls need the right fire-rated sealant, as in any building. Isle of Dogs is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Isle of Dogs is about 1 mile north-west of Greenwich, in Greater London. Our applicators cover fire rated sealant for homeowners, landlords and businesses in Isle of Dogs and the surrounding area, as part of our work across Greater London. 764 places in Greater London are on our list.
Every address in E14, SE8 and SE10 is within our area for fire rated sealant, from the main roads to the quietest streets. That includes homes and businesses on Creek Road, Wynan Road and Undine Road. We also cover North Greenwich (1 mile north-west), Millwall (1 mile west), Cubitt Town (1 mile north-east), Deptford (1 mile south-west) and Greenwich (1 mile south-east). Within a short drive, we also cover London (3 miles west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (8 miles west), St Pancras (5 miles north-west) and Shoreditch (4 miles north-west).
Landmarks near Isle of Dogs
We work in homes and buildings around The Ferry House Public House, Laban Centre and St. Paul's, among other places. You will also find Mudchute Park and Farm (within half a mile north-east) and Canary Wharf College 3 (less than half a mile north). The closest station to Isle of Dogs is Greenwich station, about 0.7 miles south. Other landmarks nearby include Greenwich Castle (1 mile south-east) and Surrey Quays Shopping Centre (1.3 miles west). Open spaces near Isle of Dogs include Tower Hill and Sue Godfrey Nature Park.
DIY versus a professional finish
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Signs you need fire rated sealant in Isle of Dogs
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 when they notice one of these:
- Open joints along the top of partitions
- Seals cut through by electricians, plumbers or data installers
- Open holes round services passing through fire walls
- Sealant items on a fire risk assessment action list
Managing a site like Harbinger Primary School? Then fire-stopping around service openings should be restored whenever new services go in.
Comparing quotes
- The length of the guarantee
- How the joint is cleaned and prepared
- Whether VAT is included
- Whether they’re fully insured
How the job changes by surface
Masonry and concrete
Core-drilled and broken-out holes in concrete are often irregular. We measure the gap at its widest point to make sure it suits the product.
Linear gaps
A linear joint may need to allow for movement as well as fire. The product and depth are chosen to suit both.
When something else is needed
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Openings too large for sealant, which need batts, boards or another system
- Fire doors that need new seals, closers or hardware
- Assessing a building’s fire safety
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly.
Surfaces we seal
- Door frames
- Service penetrations
- Linear gaps
- Pipe & cable gaps
- Plasterboard & masonry
- Flats & HMOs
Towns and villages near Isle of Dogs
Also in Isle of Dogs
What we do, step by step
Before we leave, we go over the finished joints with you and tell you how long to leave it. The work normally takes a few hours for a handful of gaps, and longer for a whole building, depending on how much there is to do. In Isle of Dogs, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- We begin by agreeing the list of gaps from your assessor’s or designer’s requirements.
- Each gap is measured and its substrate and service noted.
- 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 for your files.
How to prepare
- Mention any sign-in or site rules at work premises
- Clear the area around the work
- Mention if the joints have been sealed before
Get a quote
For a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before we start.
Related advice
Common questions in Isle of Dogs
Do you take on hotel work around Isle of Dogs?
Yes, we work for hotels as well as homes and businesses. Rooms can be done a few at a time, so the building stays open.
Do you work for landlords with property near Greenwich station?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or drop us an email and tell us about the property, and we’ll send you a clear quote.
Are you insured?
Yes. Full insurance covers our work.
How long does fire rated sealant take?
That depends on the amount of work, but most jobs take from a few hours to a few days, depending on the number of gaps and the access. We will tell you when we quote.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned.
Can I use normal mastic around a pipe through a fire wall?
No. A gap that needs fire stopping needs a tested fire-rated product fitted to the maker’s details.
Does someone need to be in?
That depends on where the joints are. For work indoors, someone needs to let us in.
Are you ARBOMaster approved?
Yes. We’re approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Why it’s worth doing now in Isle of Dogs
Leaving a gap until a refurbishment comes round can mean years with it open. Sealing the gap now is a contained job on its own and needn’t wait for anything else. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first.
Why choose Mr Mastic in Isle of Dogs
- 180+ five-star Google reviews
- We never seal over old sealant
- Full insurance on every job
- Experience in homes, commercial sites and hotels
Read what affects the cost or what customers say.