Hampshire · England
Fire-rated sealant in Hart Plain, Hampshire
Intumescent and fire-rated sealant around gaps, frames and service penetrations for homes and businesses in Hart Plain and across Hampshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Damaged fire sealant left by other trades
- New service routes left unsealed after building work
- Unsealed gaps around fire door frames
What we do, step by step
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. The job generally takes a few hours for a handful of gaps, and longer for a whole building, and we explain the cure time before we leave. Parking around Hart Plain is generally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- Access to each area is agreed so the work can run in order.
- Old, damaged or unsuitable sealant is removed.
- Dust and loose debris are cleaned from each gap.
- We apply and tool the sealant to the product’s tested detail.
- Locations and products are written up and any gaps unsuitable for sealant are flagged.
Before we arrive
- Let us know if you’ve seen damp or leaks
- Mention if the joints have been sealed before
- On commercial sites, let us know about site rules
How to get a quote
Every job is quoted individually, so start by telling us what you need. Simply phone 0345 464 0079 or drop us an email and describe the job.
Related advice
How we handle fire rated sealant in Hart Plain
Landlords, managing agents and facilities teams use us for the sealant items on a fire risk assessment for buildings in Hart Plain. Send us the list or the survey and we’ll quote for the fire-rated sealant work on it. Typical jobs include standard silicone or caulk in a fire-stopping gap and damaged fire sealant left by other trades, across service penetrations, flats & HMOs and linear gaps.
For a pub, café, guest house or shop in or near Hart Plain, the washrooms and kitchen need the same attention as a big site, and fire-rated sealant around service openings should be restored after new pipes or cables go through.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Hart Plain (PO8, PO7)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Signs you need fire rated sealant in Hart Plain
Many open fire-stopping gaps are made after the building is finished. New cables, pipes and data runs go through walls and ceilings and the hole round the new service is not always sealed again.
If you can see any of these, it’s time to have the joints looked at:
- New service routes left unsealed after building work
- Open gaps behind door architraves
- Gaps around pipes and cables through fire-resisting walls
- Gaps filled with a product that isn’t fire-rated
If you let a flat or house near Rowlands Castle station, new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
What to look for in a quote
- What guarantee comes with the work
- What happens if they find a problem under the old sealant
- Whether the sealant suits the joint
- Whether VAT is included
What affects the cost of fire rated sealant
Your quote is based on your job. We look at:
- Mould in or behind the old joints
- Access and height
- How many areas need sealing
- The product the joint needs
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
What we need to know
When you call or email, it’s useful to know:
- What the problem is, such as mould, gaps, leaks or cracking
- Roughly how big the job is
- The address or postcode of the job
- Pictures of the joints, sent by email
For fire rated sealant in Hart Plain, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Honest limits
We’d rather tell you now than do work that will not last, so these are the limits:
- Openings too large for sealant, which need batts, boards or another system
- Assessing a building’s fire safety
- Doors that are not fire doors in the first place
If you’re not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
Joints and surfaces we work on
- Plasterboard & masonry
- Flats & HMOs
- Linear gaps
- Door frames
- Service penetrations
- Pipe & cable gaps
Nearby places to Hart Plain
What else we do in Hart Plain
Your questions about fire rated sealant in Hart Plain
Is Hart Plain in your area for fire rated sealant?
Yes, Hart Plain is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Do you work for landlords with property near Rowlands Castle station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Can I choose the sealant colour?
Most of the time, yes. We’ll tell you which colours the right product comes in.
Is it worth trying it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Can new sealant go over the old?
No, it won’t last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Can you fill the gap behind a fire door frame?
Yes. The joint between frame and wall is sealed with a fire-rated sealant following the tested details. The door, its seals and closer are for a door specialist.
Where are you based?
Mr Mastic is based in Crawley. We cover Hart Plain and the rest of Hampshire.
Can you work in occupied buildings?
Yes. Flats, HMOs, offices, schools and other occupied buildings are all part of our work. The order of work and access are planned with you.
Fire rated sealant in Hart Plain: local notes
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.
Managing a site like Hart Plain Infant School? Then fire-stopping around service openings should be restored whenever new services go in. If you look after a church, hall or community building such as The Hart Plain Church, service openings in its walls need the right fire-rated sealant, as in any building.
Hart Plain is about 1 mile north of Waterlooville, in Hampshire. Anywhere in PO8, we cover fire rated sealant for homes and businesses. 683 places in Hampshire are on our list. Our Portsmouth page covers work nearby (6 miles or so).
We work across the PO8 and PO7 postcode area for fire rated sealant and the streets around it. You will find streets such as Milton Road, King's Road and Eagle Avenue, all of which we cover. We also cover the places around Hart Plain: Cowplain (1 mile north-east), Waterlooville (1 mile south), Soake (1 mile west), Furzeley Corner (2 miles west) and Purbrook (2 miles south). We also work in nearby towns such as Gosport (8 miles south-west), Havant (3 miles south-east), Eastleigh (15 miles west), Fareham (8 miles south-west), Hedge End (12 miles west) and Petersfield (9 miles north-east).
What’s near Hart Plain
Locally, jobs take us to homes and businesses close to The Cowplain School. The nearest railway station is Rowlands Castle station, roughly 3.1 miles east. Well-known places in the area include Havant Museum (3.9 miles south-east) and Clanfield Earthwork (4.1 miles north-east). Not far away are Southmoor Nature Reserve and Windmill Hill.
For landlords and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
For anyone letting property in or around Hart Plain, several properties can be quoted together. Just tell us the addresses and what each one needs.
Surface by surface
Door frames
Frame gaps are usually hidden behind the architrave. We seal any open gap to the product’s tested details.
Flats and HMOs
Flats and HMOs rely on fire separation between homes and the common parts. We work through the gaps on your assessment, flat by flat if needed.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Report cracked or damaged seals as soon as you notice them
- Tell trades working in the building that fire seals must be put back
- Never patch a fire seal with standard sealant
- Store the list of sealed gaps with your building paperwork
File the record of locations and products with your fire safety paperwork. It saves time at the next inspection or assessment.
A gap left open in a fire-resisting wall or floor lets smoke spread in ways the building wasn’t designed for. Sealing it early is a simple step to take.