Hampshire · England
Fire-rated sealant in Calshot, Hampshire
Problem with your fire-stopping gaps in Calshot? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Fire seals that have cracked with movement
- Damaged fire sealant left by other trades
- Holes left by a change of layout
Why act early in Calshot
Leaving a gap until a refurbishment comes round can mean years with it open. On its own, sealing it now is a small job that does not depend on other work. In a small place like Calshot, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, phone 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Why choose Mr Mastic in Calshot
- A 12-month guarantee on all work
- Sanitary silicone with an anti-fungal additive in wet areas
- Fully insured
- Tidy, careful work
Read how sealant jobs are priced and our reviews.
Fire rated sealant for homes and businesses in Calshot
Ordinary silicone or decorators’ caulk in a fire-stopping gap isn’t a fire-rated seal. Anything unsuitable comes out first and the gap is resealed with a product tested for that use. We work on service penetrations, flats & HMOs and door frames, and people most often call us about cracked or shrunken fire-rated sealant and gaps left after a refit or conversion.
Work in a small place like Calshot is planned ahead, journey included, so it can be fitted around guests, clients or events where possible.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Place
- Calshot (SO45)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What the job involves on each surface
Masonry and concrete
Core-drilled and broken-out holes in concrete are often irregular. We check the gap size around the service to make sure it suits the product.
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.
Fire rated sealant around Calshot
For seaside hotels, guest houses and holiday lets around Calshot, heavy use in the busy months is hard on washroom and kitchen sealant, and any building work there should leave fire-rated joints made good. 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 work to the specification you’re given, installing the product to its tested details.
Rented homes near Hamble station change hands often, and new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
Calshot is about 4 miles north of Cowes, in Hampshire. Jobs in Calshot get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Our area takes in 683 places across Hampshire, large and small. We also work in Southampton, around 8 miles away.
Jobs for fire rated sealant in SO45 works the same way as everywhere else we cover. If you need fire rated sealant at a property on Bus Drove, Elmfield Lane and Tristan Close or a nearby road, we can help. If you’re just outside Calshot, we cover Hillhead (1 mile south-east), Sprat's Down (1 mile west), Stanswood (1 mile south-west), Stonehills (1 mile north-west) and Ashlett (1 mile north-west). Within a short drive, we also cover Gosport (8 miles east), Havant (15 miles east), Eastleigh (11 miles north), Fareham (6 miles north-east), Horndean (15 miles north-east) and Totton (11 miles north-west).
Local landmarks in Calshot
Calshot’s nearest station is Hamble station, roughly 4.1 miles north of the centre. Well-known places in the area include Calshot Castle (1.1 miles north-east) and Coldeast (4.5 miles north-east). Open spaces near Calshot include Mercury Marshes and Mill Hill.
Questions from Calshot
Do you work for landlords with property near Hamble station?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
Will you come out to Calshot?
Yes. Calshot is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Where is Mr Mastic based?
We work from Crawley. We cover Calshot and the rest of Hampshire.
Is standard sealant good enough for a fire gap?
No. Ordinary silicone, caulk or foam isn’t tested as fire stopping. We cut it out and reseal with a fire-rated product.
What should I tell you?
A short description and the location, plus pictures if you have them. We’ll ask anything else we need to know.
Can you give us a record of the work?
Yes. We record the locations we have sealed and the products used to keep with your fire safety documents.
Which products do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll explain our choice.
What does intumescent mean?
Intumescent means it swells when heated. Intumescent sealants are one kind of fire-rated sealant; the right one depends on the gap and what passes through it.
Signs you need fire rated sealant in Calshot
A lot of fire stopping is out of sight: in ceiling voids, service risers and behind boxing. Because nobody sees it, gaps go unnoticed until an assessor or surveyor looks.
The most common problems we see are:
- Holes left by a change of layout
- Joints picked up in a fire-stopping survey
- Open holes round services passing through fire walls
- Fire stopping disturbed by later work
If you look after a church, hall or community building such as St George, older buildings that have had new heating or wiring often have service gaps worth checking.
Before booking anyone
- What the cure time is
- What guarantee comes with the work
- Whether you can choose the colour
- Whether the sealant suits the joint
What happens on the day
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to several days, depending on how many gaps there are and we leave things clean and tidy. In a small place like Calshot, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- Backing or fill is fitted where the product’s tested detail calls for it.
- The sealant goes in to the depth its detail sets, then it’s tooled off.
- We record the locations and products used for your records.
Preparing for the visit
- Move anything stored near the joints
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
If you’re in Calshot and need fire rated sealant, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Advice
Honest limits
We will always be straight with you, so here’s what new sealant won’t do:
- Openings too large for sealant, which need batts, boards or another system
- Issuing a fire rating or certificate for a building
- Assessing a building’s fire safety
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think before you book.
Joints and surfaces we work on
- Linear gaps
- Pipe & cable gaps
- Plasterboard & masonry
- Door frames
- Service penetrations
- Flats & HMOs
Places near Calshot
Also in Calshot
Keeping the joints in good condition
A little care helps the new joints last. We recommend:
- File the fire-stopping record where your assessor can find it
- Ask which product was used before you paint
- Make resealing part of every contractor’s brief
- Include hidden areas like risers in routine checks
Keep the record we give you with the building’s fire safety documents. It saves time at the next inspection or assessment.
Any job that breaks through a wall or ceiling should include resealing. Doing it at the time avoids leaving gaps behind.
How we quote for fire rated sealant
Jobs vary more than people expect. What affects the quote:
- The size of the job
- Any working-time requirements on site
- Access and height
- Whether old sealant or filler has to be cut out
Combining jobs into one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will give you a clear price for the lot.
What to tell us for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- A few pictures by email, if you can
- The rough size of the job
- Where the property is
- The problem you’ve noticed
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or drop us an email and describe the job and send pictures if you have them.