Southampton · England
Fire-rated sealant in Highfield, Southampton
Fire rated sealant across Highfield and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Gaps filled with a product that is not fire-rated
- Gaps flagged on a fire risk assessment
- Fire seals that have cracked with movement
Keeping the joints in good condition
Aftercare is simple, and it makes a real difference:
- Ask every contractor to reseal any fire stopping they disturb
- Include hidden areas like risers in routine checks
- Plan fire stopping into any work that goes through walls or floors
- Photograph sealed gaps before they’re covered up
Do not add foam, filler or ordinary sealant over a fire seal. If it needs repair, use the same type of product. We can tell you which product we used.
A gap left open in a fire-resisting wall or floor lets smoke spread in ways the building wasn’t designed for. Closing it is usually a straightforward job.
About our fire rated sealant in Highfield
Bigger jobs can be worked through in stages, flat by flat or floor by floor, noting the locations and products as we go. That record is useful for your files and for whoever looks at the building next. We work on service penetrations, pipe & cable gaps and door frames, and people most often call us about linear gaps at the head of walls and gaps around pipes and cables through fire-resisting walls.
In a smaller place like Highfield, commercial jobs tend to be smaller buildings: a pub, a surgery, a school, a shop or a few business units. The work is the same as in a big building, just on a smaller scale.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Place
- Highfield (SO17, SO16, SO14)
- Wider area
- Southampton
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
Most of a good job is in the preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on how many gaps there are. Parking around Highfield is usually easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We go through the gaps on your list or survey and check each one’s size and substrate.
- 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.
- Fire-rated or intumescent sealant is applied to the right depth and tooled.
- Locations and products are noted so you have them on file.
Before we arrive
- For business premises, tell us about site rules or sign-in
- Tell us about any water getting in
- Let us know about stairs, lifts or work at height
How to get a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we’ll take it from there.
Read more
Questions from Highfield
Will you come out to Highfield?
Yes, Highfield is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
I let a flat near St Denys station. Can you help?
Yes. We work for landlords and letting agents as well as householders, and several properties can go on one quote. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first.
Is there any odour?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Do you seal gaps around fire door frames?
Yes. We often seal open gaps hidden behind the architrave. Doors, seals and closers need a door specialist.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Do you carry out fire risk assessments?
No. That is for a fire risk assessor, designer or building control. We apply fire-rated sealant to the requirements they set.
Places near Highfield
More services for Highfield
What fire rated sealant looks like in Highfield
For seaside hotels, guest houses and holiday lets around Highfield, 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. In England, the Regulatory Reform (Fire Safety) Order 2005 requires a fire risk assessment for workplaces and for the common parts of blocks of flats, 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.
Letting a property close to St Denys station? Then new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant. Community buildings like Highfield Church are part of the picture too: service openings in its walls need the right fire-rated sealant, as in any building.
Highfield is about 1 mile north of Southampton, in Southampton. Every kind of property in Highfield can book us for fire rated sealant. The work is guaranteed for a year. 40 places in Southampton are on our list, from the larger towns to small villages.
Here we cover the SO17, SO16 and SO14 postcode area for fire rated sealant. Fire rated sealant is available to properties on Winn Road, Nile Road and The Avenue. You’ll find Highfield on the A3035, so it’s easy for us to get to with everything needed for fire rated sealant. We also cover Bassett (1 mile north-west), Shirley (2 miles west), Lordswood (2 miles north-west), Freemantle (2 miles south-west) and Coxford (2 miles west). Larger places within reach include Thornhill (3 miles south-east), Harefield (3 miles east), Sholing (3 miles south-east), Woolston (3 miles south), Eling (4 miles west) and Rownhams (3 miles north-west).
Local landmarks in Highfield
Locally, jobs take us to homes and businesses close to Saint George Catholic Voluntary Aided College Southampton, Richard Taunton Sixth Form College and The Cowherds Inn and the streets around them. Highfield’s nearest station is St Denys station, about 0.8 miles south-east. Other landmarks nearby include Royal South Hants Hospital (1.2 miles south) and Marlands Shopping Centre (1.7 miles south). Not far away are Netley Common.
When it is not the sealant
We’d rather tell you now than do work that will not last, so these are the limits:
- Issuing a fire rating or certificate for a building
- Openings too large for sealant, which need batts, boards or another system
- Construction that doesn’t provide fire resistance on its own
If you’re not sure, just ring 0345 464 0079 or email us and we will give you a straight answer before booking.
Surfaces we seal
- Door frames
- Flats & HMOs
- Pipe & cable gaps
- Service penetrations
- Plasterboard & masonry
- Linear gaps
Landlords, agents and businesses in Highfield
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.
Hotels need rooms back in use, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.
What affects the cost of fire rated sealant
Call for a quick quote. What matters most is:
- The number of rooms or windows
- Which sealant suits the joint
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
The cost depends on the amount of work, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
What to tell us for a quote
To help us quote quickly, let us know:
- Any previous sealing or DIY work
- The rough size of the job
- The problem you’ve noticed
- Any access issues, like height or stairs
We quote each job on its own, so the first step is telling us about yours. Simply ring 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Signs you need fire rated sealant in Highfield
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.
If you can see any of these, it’s time to have the joints looked at:
- Holes left by a change of layout
- Open joints along the top of partitions
- Standard silicone or caulk in a fire-stopping gap
- Old fire sealant that has split or come away
If you look after a building such as Highfield Church of England Primary School, fire-stopping around service openings should be restored whenever new services go in.
Questions to ask before booking
- Whether VAT is included
- Who does the work, and how experienced they are
- How the colour is chosen
- What insurance they hold