Isle of Wight · England
Fire-rated sealant in Blackwater, Isle of Wight
Fire rated sealant for Blackwater and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Open gaps behind door architraves
- Standard silicone or caulk in a fire-stopping gap
- Joints picked up in a fire-stopping survey
Keeping the joints in good condition
So the new joints stay in good condition:
- Allow for resealing whenever new services are run
- Include hidden areas like risers in routine checks
- Photograph sealed gaps before they’re covered up
- Get damaged fire seals looked at promptly
Look at the sealed gaps as part of your routine walk-rounds. Watch for cracking, gaps or seals that have been disturbed and have them put right.
A flagged gap shouldn’t wait for the next assessment. Have it sealed, then keep the record so you can show it was dealt with.
Fire rated sealant in Blackwater
Filling a fire-stopping gap with standard silicone or caulk does not make it fire-rated. Anything unsuitable comes out first and reseal with a fire-rated product tested for that kind of gap. If you’re dealing with open holes round services passing through fire walls and joints picked up in a fire-stopping survey, we can put it right, on door frames, plasterboard & masonry and linear gaps alike.
For holiday lets, converted business premises or a community building near Blackwater, the washrooms, kitchens and any fire-rated joints need the same care as a big site.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Where
- Blackwater (PO30)
- Wider area
- Isle of Wight
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What else we do in Blackwater
Why deal with it now?
If an assessor has flagged gaps, it makes sense to close them before the next review. Having them sealed and recorded now gives you evidence that the item was dealt with. In a small place like Blackwater, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Why choose Mr Mastic in Blackwater
- 4.9 on Google from 180+ five-star reviews
- Any old sealant cut out fully, not covered over
- Experience in homes, commercial sites and hotels
- A 12-month guarantee on all work
Take a look at our cost guide and what customers say.
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
FAQs for Blackwater
Is Blackwater in your area for fire rated sealant?
Yes, Blackwater is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear quote.
Is Blackwater within the area you cover?
Yes, Blackwater is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Will we have a record of what was sealed?
Yes. Locations and products are written up when we finish. If you need pictures or a set layout, ask when you get a quote.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
Do you do fire sealant around door frames?
Yes, where the gap suits a sealant detail. We seal the frame-to-wall gap, not the door itself, and we’ll mention anything we notice about the door.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
How much does fire rated sealant cost in Blackwater?
Size, access and the old material all affect the cost. Ask us for a quote.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
The process
The work is kept neat and contained to the joints we are treating. The job generally takes from a few hours to a few days, depending on the number of gaps and the access. Somewhere like Blackwater needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We start with the survey or action list, checking the size and surfaces of every gap.
- Old or unsuitable sealant is cut out and the gap cleaned.
- We put in whatever backing or fill the product detail specifies.
- We apply the fire-rated or intumescent sealant to the specified depth and tool it.
- Finally, we list where we worked and what we used, for your records.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- On commercial sites, let us know about site rules
- Keep pets and children clear of the area while we work
Get a quote
Need a quote? Please ring 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear price before we start.
Related advice
What we can’t put right
We will not take on work that won’t last, so here’s what sealant can’t put right:
- Issuing a fire rating or certificate for a building
- Problems with the door itself rather than the gap around the frame
- Big openings where sealant alone is not the tested solution
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
Surfaces we seal
- Service penetrations
- Pipe & cable gaps
- Plasterboard & masonry
- Linear gaps
- Flats & HMOs
- Door frames
What affects the cost of fire rated sealant
We quote each job individually. This is what makes a difference:
- Whether there’s mould to deal with
- The number of rooms or windows
- Working hours on commercial sites
- Which sealant suits the joint
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first and agree the price before starting.
Asking for a quote
Before you ask for a quote, have a think about:
- If someone has resealed it before
- Where the job is, and your postcode
- The problem you’ve noticed
- Pictures of the joints, sent by email
We quote each job on its own, so start by telling us what you need. Just phone 0345 464 0079 or email us with the details, and pictures are welcome.
Commercial buildings in Blackwater
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.
For site and facilities teams at buildings such as Christ The King College, service openings in fire-resisting walls need checking after any refurbishment. If you look after a church, hall or community building such as St. Olave's Church, gaps around pipes and cables are worth checking after any building work there.
Blackwater is about 2 miles south of Newport, in the Isle of Wight. Homes, rented property, offices and hotels in Blackwater is covered for fire rated sealant, old or new, large or small. The work is guaranteed for a year. We cover 125 towns and villages across the Isle of Wight, from the larger towns to small villages. Portsmouth is on our list too, about 13 miles from Blackwater.
All of PO30 is within our area for fire rated sealant. Whether your property is on Sandy Lane, Sandy Close and Blackwater Hollow or a nearby road, we can help. We also cover the places around Blackwater: Shide (1 mile north), Rookley (1 mile south), Merstone (2 miles south-east), Newport (2 miles north) and Rookley Green (2 miles south). We also work in nearby towns such as Ryde (6 miles north-east), Cowes (6 miles north), Sandown (6 miles east), Shanklin (6 miles south-east), Ventnor (6 miles south-east) and East Cowes (5 miles north). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
Around Blackwater
A little further out are Whitecroft Hospital (0.8 miles west) and Carisbrooke Castle (1.5 miles north-west). The countryside around Blackwater includes Briddlesford Nature Reserve and Stenbury Down.
Surface by surface
Plasterboard walls
In plasterboard walls, the condition of the board edge matters. Loose material is removed so the sealant has a firm edge.
Linear gaps
Long, narrow gaps appear where walls meet slabs and ceilings. We seal them to the tested detail, with backing where it’s needed.