Essex · England
Thornwood Common Fire Rated Sealant
We cover Thornwood Common for intumescent and fire-rated sealant around gaps, frames and service penetrations. Old material cut out, joints cleaned and sealed neatly.
- Damaged fire sealant left by other trades
- Gaps left after a refit or conversion
- Gaps where walls meet ceilings or slabs
Fire rated sealant in Thornwood Common, done properly
Filling a fire-stopping gap with standard silicone or caulk doesn’t make it fire-rated. Anything unsuitable comes out first and reseal with a fire-rated product tested for that kind of gap. We work on service penetrations, door frames and linear gaps, and the jobs we see most are fire stopping disturbed by later work and standard silicone or caulk in a fire-stopping gap.
Work in a small place like Thornwood Common is planned ahead, journey included, so it can be fitted around guests, clients or events where possible.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Location
- Thornwood Common (CM16)
- Wider area
- Essex
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
When something else is needed
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- A wall that isn’t a fire-resisting element to begin with
- Openings too large for sealant, which need batts, boards or another system
- Problems with the door itself rather than the gap around the frame
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before booking.
What we seal
- Service penetrations
- Plasterboard & masonry
- Linear gaps
- Pipe & cable gaps
- Door frames
- Flats & HMOs
Towns and villages near Thornwood Common
What else we do in Thornwood Common
Fire rated sealant in Thornwood Common: 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 work to the specification you are given, installing the product to its tested details.
If you let a flat or house near Harlow Town station, any gap left by new services in shared walls should be closed with a fire-rated product.
Thornwood Common is about 3 miles south of Harlow, in Essex. If you need fire rated sealant in Thornwood Common, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We are based in Crawley and cover Essex. Thornwood Common is one of 644 places in Essex we cover for fire rated sealant. There’s also a page for Chelmsford, roughly 15 miles from Thornwood Common.
All of CM16 is covered for fire rated sealant, from the main roads to the quietest streets. We cover properties on Rowley Mead, Duck Lane and Weald Hall Lane. Nearby, we also carry out fire rated sealant in Coopersale (1 mile south), North Weald Bassett (2 miles east), Hastingwood (2 miles north-east), Bush Fair (3 miles north) and Foster Street (3 miles north). Larger places within reach include Chelmsford (15 miles east), Harlow (3 miles north), Brentwood (10 miles south-east), Billericay (14 miles south-east), Loughton (6 miles south-west) and Waltham Abbey (6 miles south-west).
Local landmarks in Thornwood Common
We work in homes and buildings around Thornwood Common Flood Meadow, among other places. Thornwood Common’s nearest station is Harlow Town station, about 4.5 miles north. A little further out are Epping Signalling Museum (2 miles south) and St. Margaret's Hospital (1.1 miles south). Not far away are Gernon Bushes.
What happens on the day
Good joint work is mostly preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it generally takes a few hours for a handful of gaps, and longer for a whole building. Somewhere like Thornwood Common needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We plan the order of work and access, floor by floor or flat by flat.
- We take out any damaged or unsuitable sealant.
- Gaps are cleaned of dust and loose material.
- 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.
How to prepare
- For business premises, tell us about site rules or sign-in
- Mention any tricky access
- Keep pets and children clear of the area while we work
Ask for a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or email us.
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Thornwood Common: your questions answered
Do you cover Thornwood Common for fire rated sealant?
Yes, Thornwood Common is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Do you work for landlords with property near Harlow Town station?
Yes, we work for landlords and agents. 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 offer different sealant colours?
Yes. White, clear and grey are common, and other colours are available, and we agree the colour with you before work begins.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in.
Do you take out the old sealant first?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Can you seal over the old sealant?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
What fire rating will the seal have?
We don’t issue ratings or certificates ourselves. The performance comes from the product’s tested details and the specification from your assessor or designer; we install to those details and record what we did.
What do you put in the joint?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Why deal with it now?
Items left open on a fire risk assessment tend to come back at the next review. Having them sealed and recorded now gives you evidence that the item was dealt with. Where a wall is exposed, as many are in small places like Thornwood Common, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why choose Mr Mastic in Thornwood Common
- Approved under the ARBOMaster scheme
- Anti-fungal sanitary silicone in wet areas
- Experience in homes, commercial sites and hotels
- Fully insured
Take a look at what affects the cost and our reviews.
How the job changes by surface
Door frames
Behind most architraves is a gap between frame and wall. Where it’s open, we seal it to the product’s details for that gap size before the trim goes back.
Masonry and concrete
Brick, block and concrete walls and floors are sealed with products tested in masonry. We clean out dust and debris before sealing so the seal has something sound to bond to.
Looking after it afterwards
Aftercare is simple:
- Check risers, ceiling voids and cupboards during building checks
- Don’t paint over fire sealant until it has cured
- Include fire stopping when you schedule refits
- Keep the record of products and locations with your fire safety documents
Look at the sealed gaps as part of your routine walk-rounds. Watch for cracking, gaps or seals that have been disturbed and have them put right.
If a fire risk assessment has flagged a gap, do not leave it for the next one. Get it sealed and recorded.
How we quote for fire rated sealant
The price is agreed before any work begins. It takes into account:
- Working hours on commercial sites
- How many rooms, windows or areas are involved
- Any mould that needs treating
- Which sealant suits the joint
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first and agree the price before starting.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- How we’d reach the joints
- What the problem is, such as mould, gaps, leaks or cracking
- The address or postcode of the job
- Photos by email, if that is easy
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or drop us an email and describe the job and send photos if you have them.
What we are called out for in Thornwood Common
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.
Look out for any of the following:
- Ordinary sealant used where a fire-rated product was needed
- Gaps around pipes and cables through fire-resisting walls
- Seals cut through by electricians, plumbers or data installers
- New service routes left unsealed after building work
For site and facilities teams at buildings such as St John's Church of England Voluntary Controlled School, fire-stopping around service openings should be restored whenever new services go in.
What your quote should include
- Who does the work, and how experienced they are
- The length of the guarantee
- Are they insured?
- When the joint can take water or movement