Hertfordshire · England
Garston Fire Rated Sealant
Fire rated sealant in Garston from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Joints picked up in a fire-stopping survey
- Seals cut through by electricians, plumbers or data installers
- Gaps where walls meet ceilings or slabs
Fire rated sealant for homes and businesses in Garston
In flats, HMOs, offices and schools, fire stopping is often disturbed by later work. A new cable run or a replaced pipe can leave an open hole behind. Those are the gaps we close, using a tested fire-rated product. We work on pipe & cable gaps, door frames and linear gaps, and people most often call us about gaps where walls meet ceilings or slabs and open holes round services passing through fire walls.
For a pub, café, guest house or shop in or near Garston, the washrooms and kitchen need the same attention as a big site.
Our work is backed for twelve months.
- Where
- Garston (WD25, WD24, AL2)
- Region
- Hertfordshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
There is not much for you to do on the day. Point us to the joints and we’ll get on with it. The work itself takes from a few hours to a few days, depending on the number of gaps and the access from start to finish. In a smaller place like Garston, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- Before starting, we go through the specification or action list with you.
- We measure every gap and note what it’s in and what passes through.
- Unsuitable material such as ordinary foam or silicone is cut out.
- The specified fire-rated sealant goes in over any backing its detail requires.
- Every location is recorded with the product used for your files.
Getting ready for the visit
- Mention any parking rules near the property
- Move anything stored near the joints
- Mention any leaks or damp you’ve noticed
Get a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Advice
What else we do in Garston
What affects the cost of fire rated sealant
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Mould in or behind the old joints
- How many areas need sealing
- Whether old sealant or filler has to be cut out
- The size of the job
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we will explain the quote if you ask.
What to tell us for a quote
You don’t need to know the technical terms. Just tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- Access, such as stairs, a lift or height
- A few pictures by email, if you can
- Any previous sealing or DIY work
Every job is quoted individually. Simply call 0345 464 0079 or drop us an email and describe the job, and photos are welcome.
Landlord and commercial work in Garston
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
If you manage several properties in or around Garston, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and photos by email help.
When it is not the sealant
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Deciding what fire stopping a building needs
- Big openings where sealant alone is not the tested solution
- Sign-off of the building, which sits with building control or your assessor
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Where we work in Garston
- Flats & HMOs
- Service penetrations
- Plasterboard & masonry
- Pipe & cable gaps
- Door frames
- Linear gaps
Why act early in Garston
Items left open on a fire risk assessment tend to come back at the next review. Getting them done and written up gives you evidence that the item was dealt with. In a smaller place like Garston, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why choose Mr Mastic in Garston
- Quality sealants from Arbo and Everbuild
- We never seal over old sealant
- Anti-fungal silicone where joints get wet
- ARBOMaster approved applicator
Take a look at what affects the cost and what customers say.
Surface by surface
Linear gaps
Head-of-wall gaps are often hidden above suspended ceilings. We seal them along their full length so there are no open sections left.
Door frames
The gap between a door frame and the wall around it needs sealing as well as the door itself. We fill it with a fire-rated product suited to the materials either side.
Your questions about fire rated sealant in Garston
Do you cover smaller places like Garston?
Yes, Garston is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you cover Garston for fire rated sealant?
Yes. We work across London and the South East, and Garston is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
Which products do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll explain our choice.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Do you carry out fire risk assessments?
No, assessment is not something we do. Once you have a specification or action list from your assessor or designer, we will quote for the sealant work on it.
Where is Mr Mastic based?
We’re a Crawley-based firm. Our area covers South East England, London and Scotland.
Do you seal gaps around fire door frames?
Yes. The joint between frame and wall is sealed with a fire-rated sealant. The door leaf and its hardware need a door specialist.
Is intumescent sealant the same as fire-rated sealant?
Intumescent means it swells when heated. Intumescent sealants are one kind of fire-rated sealant; which product suits depends on the gap, the substrate and the service.
Workplaces and buildings in Garston
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 The Grove Academy, gaps opened by contractors for new cabling are a common finding in schools and offices. Letting a property close to Garston station? Then fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through. If you look after a church, hall or community building such as Stanborough Park Church, gaps around pipes and cables are worth checking after any building work there.
Garston is about 2 miles north of Watford, in Hertfordshire. Garston gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Garston is one of 381 places in Hertfordshire we cover for fire rated sealant. You can also see our page for London, about 18 miles away.
Here we cover the WD25, WD24 and AL2 postcode area for fire rated sealant. Whether your property is on First Avenue, Third Avenue and Fifth Avenue or a nearby road, our applicators can take on the job. Close by, we work in Meriden (1 mile south), Leavesden (1 mile north-west), North Watford (1 mile south), Aldenham (2 miles south-east) and Watford (2 miles south). Further out, we also cover Hemel Hempstead (6 miles north-west), St Albans (5 miles north-east), Welwyn Garden City (11 miles north-east), Harpenden (9 miles north), Cheshunt (14 miles east) and Hatfield (8 miles north-east).
Around Garston
Typical jobs here are in homes near Francis Combe Academy and Garston Park and the streets around them. There’s a railway station in Garston itself: Garston station. Nearby you will also find Leavesden Hospital (1.4 miles north-west) and Charter Place (2.3 miles south). Green spaces nearby include Longspring Wood and Verulamium Lake.
Aftercare tips
Aftercare is simple:
- Do not paint over fire sealant until it has cured
- Include fire stopping when you schedule refits
- Keep general-purpose foam and caulk away from fire-stopping gaps
- Take pictures of fire stopping before ceilings or boxing go back
Don’t drill through or remove a fire seal without putting it back properly. New services through a sealed wall should include fire stopping in the plan.
Any job that breaks through a wall or ceiling should include resealing. Doing it at the time avoids leaving gaps behind.