Surrey · England
Fire-rated sealant in St John's, Surrey
Fire rated sealant for St John's and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Holes left by a change of layout
- Sealant items on a fire risk assessment action list
- Unsealed gaps around fire door frames
What affects the quote in St John's
Call for a quick quote. What matters most is:
- Any working-time requirements on site
- Which sealant suits the joint
- The size of the job
- How many areas need sealing
Doing several joints on one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
What to tell us for a quote
Before you ask for a quote, have a think about:
- The problem you’ve noticed
- Pictures of the joints, sent by email
- The address or postcode of the job
- Any access issues, like height or stairs
Getting a quote is simple: let us know the job and the location. Photos by email help us understand the job, and we’ll take it from there.
Fire rated sealant for homes and businesses in St John's
Fire-rated sealant closes the gaps around pipes, cables and frames where they pass through a fire-resisting wall or floor. Each gap is sealed to the product maker’s tested detail for its size and substrate, with a record of the products and locations if you need one. If you have open gaps behind door architraves and gaps around pipes and cables through fire-resisting walls, we can put it right, whatever the surface.
Community buildings, schools and small businesses around places like St John's have washrooms and kitchens that see a lot of use. Sealant and fire-rated joints there matter as much as in any larger building.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Where
- St John's (GU21, GU22)
- Region
- Surrey
- Guarantee
- 12 months on all our work
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Your questions about fire rated sealant in St John's
Is St John's in your area for fire rated sealant?
Yes, St John's is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll send you a clear quote.
Can you help a landlord with a rental near Woking station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Are you insured?
Yes. Full insurance covers our work.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
Do you take on fire stopping in schools and offices?
Yes. Flats, HMOs, offices, schools and other occupied buildings are all part of our work. The order of work and access are planned with you.
Can new sealant go over the old?
No, it won’t last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Towns and villages near St John's
More services for St John's
Workplaces and buildings in St John's
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 work to the specification you’re given, installing the product to its tested details.
Schools such as The Winston Churchill School A Specialist Sports College are buildings too, and fire-stopping around service openings should be restored whenever new services go in. For buildings such as St John's Church, gaps around pipes and cables are worth checking after any building work there.
St John's is about 1 mile west of Woking, in Surrey. Whether you are in the middle of St John's or further out, we cover fire rated sealant for every kind of property. We cover 395 towns and villages across Surrey. For nearby work, see our Reading page, about 19 miles away.
All of GU21 and GU22 is covered for fire rated sealant, from the main roads to the quietest streets. If you need fire rated sealant at a property on Pond Road, Copse Road and Raglan Road or anywhere close by, we can help. Being close to the A324, St John's is easy for our applicators to reach. We also cover the places around St John's: Goldsworth Park (1 mile north-east), Woking (1 mile east), Westfield (2 miles south-east), Horsell (2 miles north-east) and Mimbridge (2 miles north). Further out, we also cover Guildford (5 miles south), Camberley (6 miles west), Epsom (14 miles east), Farnham (11 miles south-west), Ewell (15 miles east) and Egham (8 miles north).
Local landmarks in St John's
Locally, jobs take us to homes and businesses close to Hoe Valley School, The Oaktree School and Royal Oak pub. St John's’s nearest station is Woking station, roughly 1.6 miles east. Nearby you will also find Brookwood Hospital (1 mile west) and The Peacocks (1.6 miles east). Not far away are Brookwood Lye.
Looking after it afterwards
So the new joints stay in good condition:
- Do not paint over fire sealant until it has cured
- Keep the record of products and locations with your fire safety documents
- Make resealing part of every contractor’s brief
- Don’t fill fire-stopping gaps with ordinary foam or silicone
Don’t add foam, filler or ordinary sealant over a fire seal. If it needs repair, use the same type of product. We can tell you which product we used.
A flagged gap shouldn’t wait for the next assessment. Have it sealed, then keep the record so you can show it was dealt with.
Do you need fire rated sealant in St John's?
A lot of fire stopping is out of sight: above ceilings, inside risers and behind panels. Because nobody sees it, gaps go unnoticed until an assessor or surveyor looks.
The problems people generally mention when they call include:
- Gaps where walls meet ceilings or slabs
- Unsealed gaps around fire door frames
- Old fire sealant that has split or come away
- New service routes left unsealed after building work
Rented homes near Woking station change hands often, and fire-rated sealant around pipes and cables through walls and floors needs making good whenever new services go through.
What your quote should include
- Whether they seal over old material or remove it
- How long to leave it before use
- The length of the guarantee
- Who turns up on the day
What the job involves on each 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 so the architrave can be refitted.
Linear gaps
Linear gaps run along the head of walls, at floor edges and between panels. We seal them to the tested detail, with backing where it’s needed.
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Landlord and commercial work in St John's
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
If you manage several properties in or around St John's, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
How the visit works
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to several days, depending on how many gaps there are, and the area is left clean. A visit to St John's is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- 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.
- We fit backing where needed and apply the fire-rated sealant to depth.
- We hand over a list of locations and products.
Getting ready for the visit
- Mention if the joints have been sealed before
- Keep pets and children clear of the area while we work
- Try not to wet indoor joints just before the visit
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that is easy.