Hertfordshire · England
Fire Rated Sealant in Radwell
Fire rated sealant in Radwell from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps filled with a product that isn’t fire-rated
- Unsealed gaps around fire door frames
- Cracked or shrunken fire-rated sealant
Quotes for fire rated sealant in Radwell
We do not publish a price list. What we look at:
- Any working-time requirements on site
- Mould in or behind the old joints
- The number of rooms or windows
- The old material and how stubborn it is
Leaving a failed joint usually makes the job bigger, not smaller. If you’re unsure, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- Where the property is
- Pictures of the joints, sent by email
- Whether it has been sealed before
- Access, such as stairs, a lift or height
There’s no standard price list. Instead, we send you a clear quote for your job. To get started, ring 0345 464 0079 or send us an email.
Fire rated sealant for homes and businesses in Radwell
We can work through a building room by room or floor by floor. That record is useful for your files and for whoever looks at the building next. We work on flats & HMOs, service penetrations and pipe & cable gaps, and people most often call us about open gaps behind door architraves and holes left by a change of layout.
In a village or hamlet like Radwell, commercial work is more likely to be a pub, a farm shop, holiday lets or a village hall than an office block. Each still needs sound sealant in its washrooms and kitchens, and fire-rated joints where services pass through walls.
Each job carries a 12-month guarantee.
- Place
- Radwell (SG7)
- Region
- Hertfordshire
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Common questions in Radwell
I let a flat near Baldock station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll send you a clear quote.
Do you cover smaller places like Radwell?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Will you assess my building’s fire safety?
No. We work from the specification you give us and install to the manufacturer’s details.
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.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Can you give us a record of the work?
Yes. We note each location and the product that went in so it’s there for the next inspection.
Will the old sealant be removed?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or send us an email.
How the visit works
There is not much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes a few hours for a handful of gaps, and longer for a whole building from start to finish. For a village or hamlet like Radwell, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We begin by agreeing the list of gaps from your assessor’s or designer’s requirements.
- 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 and the gap cleaned.
- We fit backing where needed and apply the fire-rated sealant to depth.
- We hand over a list of locations and products for your records.
Before we arrive
- On commercial sites, let us know about site rules
- For indoor joints, keep the area dry beforehand if you can
- Move anything stored near the joints
How to get a quote
Need a quote? Please phone 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
Why deal with it now?
Fire-rated sealants need more care than everyday sealant. How it’s installed changes how it performs, so we follow the maker’s details on every gap. In a small place like Radwell, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
The cost depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before any work starts.
Why Radwell customers choose us
- We are fully insured
- We leave the area clean and tidy
- One-year guarantee on every job
- Arbo and Everbuild products
Take a look at how sealant jobs are priced and our reviews.
Nearby places to Radwell
Also in Radwell
When something else is needed
Before booking, it’s worth knowing the limits too:
- Fire risk assessments, which need a qualified assessor
- Openings too large for sealant, which need batts, boards or another system
- Walls or floors that weren’t built to resist fire
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
Surfaces we seal
- Flats & HMOs
- Service penetrations
- Pipe & cable gaps
- Door frames
- Plasterboard & masonry
- Linear gaps
How to look after the new joints
Good habits help new joints last longer. A few tips:
- Check risers, ceiling voids and cupboards during building checks
- Include fire stopping when you schedule refits
- Check whether a sealant can be painted before decorating over it
- Photograph sealed gaps before they’re covered up
Leave the sealant to cure fully before painting near it. Some fire-rated sealants can be painted and some cannot.
If a fire risk assessment has flagged a gap, don’t leave it for the next one. Get it sealed and recorded.
What fire rated sealant looks like in Radwell
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, 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.
Rented homes near Baldock station change hands often, and new cables or pipes through a fire-resisting wall leave a gap that needs the right sealant. Schools such as Norton St Nicholas CofE (VA) Primary School are buildings too, and 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 Church of All Saints, older buildings that have had new heating or wiring often have service gaps worth checking.
Radwell is about 2 miles north of Letchworth, in Hertfordshire. Jobs in Radwell get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 381 towns and villages across Hertfordshire. Our London page covers work nearby, about 35 miles away.
Our applicators cover all of the SG7 postcode area for fire rated sealant and the streets around it. Whether your property is on Radwell Lane and The Limes or anywhere close by, our applicators can take on the job. Neighbouring places we cover for fire rated sealant include Stotfold (1 mile west), Stotfold Common (2 miles north-west), Fairfield (2 miles west) and Astwick (2 miles north-west). Larger places within reach include Stevenage (7 miles south), Welwyn Garden City (14 miles south), Harpenden (15 miles south-west), Hitchin (5 miles south-west), Hertford (15 miles south) and Ware (15 miles south-east).
What’s near Radwell
In Radwell, that means homes and buildings near The Knights Templar School, Norton School and The Chequers Public House, among other places. Radwell’s nearest station is Baldock station, about 1.2 miles south-east of the centre. A little further out are Bygrave House (2 miles east) and Fairfield Hospital (1.9 miles west). Open spaces near Radwell include Arlesey Old Moat and Glebe Meadows.
For landlords and businesses
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we are fully insured.
Landlords and letting agents in Radwell can book us as well as householders. Resealing between tenancies keeps a property looking cared for.