Hampshire · England
Nashes Green Fire Rated Sealant
Intumescent and fire-rated sealant around gaps, frames and service penetrations for homes and businesses in Nashes Green and across Hampshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Sealant items on a fire risk assessment action list
- Open gaps behind door architraves
- Holes left by a change of layout
Fire rated sealant for homes and businesses in Nashes Green
Filling a fire-stopping gap with standard silicone or caulk does not make it fire-rated. Anything unsuitable comes out first and the gap is resealed with a product tested for that use. We work on door frames, service penetrations and pipe & cable gaps, and the jobs we see most are joints picked up in a fire-stopping survey and linear gaps at the head of walls.
Somewhere as small as Nashes Green, commercial jobs tend to be pubs, holiday lets, farm buildings or halls rather than offices. They all have washrooms, kitchens and service openings that need the right sealant.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Location
- Nashes Green (RG25)
- Wider area
- Hampshire
- Cover
- One year on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
When it is not the sealant
Some problems need a builder, plumber or other trade rather than us:
- Large holes that need a different fire-stopping system
- Certifying a building or signing off its fire safety
- Fire doors that need new seals, closers or hardware
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before you book.
What we seal
- Door frames
- Plasterboard & masonry
- Linear gaps
- Service penetrations
- Flats & HMOs
- Pipe & cable gaps
How to look after the new joints
A little care helps the new joints last. Our advice:
- Store the list of sealed gaps with your building paperwork
- Ask every contractor to reseal any fire stopping they disturb
- Get damaged fire seals looked at promptly
- Photograph sealed gaps before they’re covered up
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. Catching it then saves a separate visit later.
Your questions about fire rated sealant in Nashes Green
Can you do fire rated sealant in Nashes Green?
Yes. Our work covers London and the South East, and Nashes Green is part of that. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear quote.
Can you help a landlord with a rental near Alton station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Do you seal gaps around fire door frames?
Yes, where the gap suits a sealant detail. Our work is the gap around the frame.
Where do you work from?
Mr Mastic is based in Crawley. We cover Nashes Green and the rest of Hampshire.
Is it messy?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Is intumescent sealant the same as fire-rated sealant?
Fire-rated sealant covers any sealant tested for use in fire stopping. Intumescent ones swell in heat, and they’re one option among several. The specification and the tested detail decide which is used.
Can ordinary silicone be used in a fire-stopping gap?
No. Where a fire-rated seal is needed, it has to be a product tested for that use.
What fire rating will the seal have?
Ratings and certification sit with the product’s test evidence and whoever specified the work. We apply the specified product to the manufacturer’s details and giving you a record of where it went.
Landlords, agents and businesses in Nashes Green
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 Nashes Green, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
How it works
Most of a good job is in the preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a handful of gaps, and longer for a whole building. Somewhere as small as Nashes Green, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We go through the gaps on your list or survey and check each one’s size and substrate.
- Anything that is not fit for the job comes out, and the gap is cleaned.
- We put in whatever backing or fill the product detail specifies.
- We apply the fire-rated or intumescent sealant to the specified depth and tool it.
- Locations and products are noted so you have them on file.
Before we arrive
- Let us know about earlier repairs to the joints
- For indoor joints, keep the area dry beforehand if you can
- Clear items away from the joints we’re working on
How to get a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved and give you a clear quote.
Read more
Places near Nashes Green
What else we do in Nashes Green
Signs you need fire rated sealant in Nashes Green
Gaps also open up as buildings move: cracked or debonded sealant leaves an open route through the wall. Damage from cleaning, knocks and maintenance adds to it.
Keep an eye out for these signs:
- Joints picked up in a fire-stopping survey
- Old fire sealant that has split or come away
- Open joints along the top of partitions
- Standard silicone or caulk in a fire-stopping gap
If you let a flat or house near Alton station, any gap left by new services in shared walls should be closed with a fire-rated product.
What to look for in a quote
- Which sealant they’ll use, and why
- Whether they seal over old material or remove it
- What happens if they find a problem under the old sealant
- The length of the guarantee
Commercial buildings in Nashes Green
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 work to the specification you are given, installing the product to its tested details.
If you look after a church, hall or community building such as Church of St. Mary, gaps around pipes and cables are worth checking after any building work there.
Nashes Green is about 5 miles north-west of Alton, in Hampshire. We provide fire rated sealant to homeowners, landlords and businesses in Nashes Green, as part of our work across Hampshire. 683 places in Hampshire are on our list. For nearby work, see our Reading page, about 17 miles away.
Work in RG25 is quoted and booked the same way as anywhere else. We also cover the places around Nashes Green: Ellisfield (2 miles west), Upton Grey (2 miles north-east), Upper Common (3 miles west), Cliddesden (3 miles north-west) and Viables (4 miles north-west). Larger places within reach include Basingstoke (5 miles north-west), Farnborough (13 miles north-east), Fleet (10 miles north-east), Aldershot (12 miles east), Alton (5 miles south-east) and Petersfield (14 miles south).
Landmarks near Nashes Green
Nashes Green’s nearest station is Alton station, roughly 4.7 miles south-east. A little further out are Gliding Heritage Centre (1.4 miles south-east) and Basing House (4.6 miles north). For a walk, there’s Holybourne Hill.
Why act early in Nashes Green
An open gap in a fire-resisting wall is a route for smoke and fire. Sealing it properly restores what the wall was there to do, and the sealing itself is often a contained piece of work. In a small place like Nashes Green, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Doing several joints on one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why Nashes Green customers choose us
- An ARBOMaster approved applicator
- More than 20 years in sealant work
- Neat joints and a tidy finish
- We never seal over old sealant
Take a look at how sealant jobs are priced and what customers say.