Slough · England
Fire Rated Sealant in Colnbrook
Intumescent and fire-rated sealant around gaps, frames and service penetrations for Colnbrook, backed by a 12-month guarantee. Ask us for a quote.
- Sealant items on a fire risk assessment action list
- Linear gaps at the head of walls
- Unsealed gaps where pipes and cables go through a wall
Can I do it myself?
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Fire rated sealant in Colnbrook
Deciding which gaps need fire stopping isn’t our role; that comes from your fire risk assessor, designer or building control. What we do is apply the right product to that specification, properly and neatly. If you have unsealed gaps where pipes and cables go through a wall and fire seals that have cracked with movement, we can help.
If you have holiday lets, a converted barn used for business or a community building near Colnbrook, the washrooms, kitchens and any fire-rated joints need the same care as a big site.
Big or small, it’s backed by our one-year guarantee in Colnbrook and across Slough.
- Location
- Colnbrook (SL3)
- Region
- Slough
- Cover
- 12 months on all our work
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Why it’s worth doing now in Colnbrook
Doing it once, properly, beats doing it twice. If the details weren’t followed, the seal may need redoing when the building is next checked. In a small place like Colnbrook, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
What you get with us
- ARBOMaster approved applicator
- A 12-month guarantee on all work
- Fully insured
- Old sealant always removed completely
Read our cost guide or customer reviews.
What affects the quote in Colnbrook
You will get a clear quote before work begins. It takes into account:
- Whether old sealant or filler has to be cut out
- Whether there’s mould to deal with
- Working hours on commercial sites
- How much there is to do
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
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:
- How we’d reach the joints
- The rough size of the job
- The type of property
- Any previous sealing or DIY work
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we will explain what’s involved and give you a clear quote.
How the visit works
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take from a few hours to a few days, depending on the number of gaps and the access. Somewhere as small as Colnbrook, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We plan the order of work and access, floor by floor or flat by flat.
- Old, damaged or unsuitable sealant is removed.
- Dust and loose debris are cleaned from each gap.
- The fire-rated or intumescent sealant is applied and tooled to the tested detail.
- Locations and products are written up and any gaps unsuitable for sealant are flagged.
Preparing for the visit
- Tell us if parking is tricky
- Tell us about any previous sealing or DIY attempts
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
For fire rated sealant in Colnbrook, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
Related advice
When it is not the sealant
We won’t take on work that will not last, so these are the limits:
- Construction that does not provide fire resistance on its own
- Large holes that need a different fire-stopping system
- Fire doors that need new seals, closers or hardware
If you are not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Joints and surfaces we work on
- Plasterboard & masonry
- Linear gaps
- Service penetrations
- Flats & HMOs
- Door frames
- Pipe & cable gaps
What fire rated sealant looks like in Colnbrook
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 are given, installing the product to its tested details.
For buildings such as Church of St Thomas, service openings in its walls need the right fire-rated sealant, as in any building. If you look after a building such as Colnbrook Church of England Primary School, fire-stopping around service openings should be restored whenever new services go in. Letting a property close to Sunnymeads station? Then new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant.
Colnbrook is about 4 miles north of Staines-upon-Thames, in Slough. Every kind of property in Colnbrook is covered for fire rated sealant, old or new, large or small. Every job comes with our one-year guarantee. Colnbrook is one of 31 places in Slough where we work for fire rated sealant. We also work in London, around 19 miles away.
Every address in SL3 is within our area for fire rated sealant, from the main roads to the quietest streets. Streets in the area include High Street, Rayners Close and Drift Way, and we cover them all. If you’re just outside Colnbrook, we cover Poyle (1 mile south-east), Brands Hill (1 mile west), Horton (1 mile south-west), Stanwell Moor (2 miles south-east) and Ditton (2 miles west). Larger places within reach include Slough (4 miles north-west), Cippenham (5 miles north-west), Chalvey (4 miles north-west), Britwell (5 miles north-west), Upton (3 miles north-west) and Burnham (7 miles north-west).
Near you in Colnbrook
Around Colnbrook, our work takes us to homes and buildings near Arthur Jacob Nature Reserve, The Red Lion Public House and Langley Grammar School and the streets around them. The nearest railway station is Sunnymeads station, roughly 1.7 miles south-west. Well-known places in the area include Windsor Castle (3.4 miles west) and Upton Hospital (3.2 miles north-west). Green spaces nearby include Uxbridge Moor and Staines Reservoirs.
How the job changes by surface
Flats and HMOs
Flats and HMOs rely on fire separation between homes and the common parts. We seal the gaps your assessor has identified, flat by flat if needed.
Masonry and concrete
Preparation counts on brick, block and concrete. The gap is cleaned and backed where required.
Work for landlords, hotels and businesses
For anyone letting property in or around Colnbrook, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
We work for letting agents and landlords as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
Nearby places to Colnbrook
What else we do in Colnbrook
Common questions in Colnbrook
Is Colnbrook within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is Colnbrook in your area for fire rated sealant?
Yes. We work across London and the South East, and Colnbrook is part of that. You can call 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear price.
Do you carry out fire risk assessments?
No. Your fire risk assessor, designer or building control decides that. We apply fire-rated sealant to the requirements they set.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Can you quote for more than one area?
Yes. Several rooms, windows or areas can go on one quote.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Where do you work from?
We are based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
I’m a tenant. Can you help?
We’re happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.