East Sussex · England
Mark Cross Fire Rated Sealant
Professional fire rated sealant in and around Mark Cross, with every bit of old sealant taken out first and a 12-month guarantee.
- Open joints along the top of partitions
- Gaps left after a refit or conversion
- Gaps flagged on a fire risk assessment
About our fire rated sealant in Mark Cross
Later work by other trades often breaks through fire stopping, especially in flats, HMOs, offices and schools. A new cable run or a replaced pipe can leave an open hole behind. Those are the gaps we close, using a tested fire-rated product. If you’re dealing with gaps around pipes and cables through fire-resisting walls and door frames with gaps between frame and wall, we can put it right, whatever the surface.
Work in a small place like Mark Cross is planned ahead, journey included, so the job can fit around bookings, guests or opening times where possible.
All of our work is guaranteed for twelve months, in Mark Cross and everywhere else we cover.
- Where
- Mark Cross (TN6)
- Wider area
- East Sussex
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for fire rated sealant
For a quick quote, just ask. What matters most is:
- How many areas need sealing
- The old material and how stubborn it is
- Whether the work is at height
- The number and length of the joints
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
What to tell us for a quote
When you call or email, it’s useful to know:
- The address or postcode of the job
- Whether it’s a home or a business
- How we’d reach the joints
- The problem you’ve noticed
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work.
Mark Cross questions
Can you do fire rated sealant in Mark Cross?
Yes. Our work covers London and the South East, and Mark Cross is part of that. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
Do you work for landlords with property near Wadhurst station?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Can new sealant go over the old?
No. The old sealant always comes out first.
Do you carry out fire risk assessments?
No. We follow the requirements from your assessor, designer or building control, and apply each product to its tested details.
Are you insured?
Yes, we’re fully insured for every job we do.
Can you fill the gap behind a fire door frame?
Yes. We often seal open gaps hidden behind the architrave. The door and its fittings are a separate job for a door specialist.
Can I use normal mastic around a pipe through a fire wall?
No. Standard sealants aren’t made or tested to stop fire. If it’s been used, we remove it and use the right product.
What do you need from me for a quote?
Let us know what needs doing and where, plus photos if you have them. If we need more, we will ask.
What we cannot put right
We will not take on work that will not last, so here’s what sealant cannot put right:
- Openings too large for sealant, which need batts, boards or another system
- Deciding what fire stopping a building needs
- Issuing a fire rating or certificate for a building
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think.
Joints and surfaces we work on
- Pipe & cable gaps
- Linear gaps
- Service penetrations
- Door frames
- Plasterboard & masonry
- Flats & HMOs
Nearby places to Mark Cross
What else we do in Mark Cross
Fire rated sealant around Mark Cross
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’re given, installing the product to its tested details.
For buildings such as St Marks, service openings in its walls need the right fire-rated sealant, as in any building. Rented homes near Wadhurst 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 Mark Cross Church of England Aided Primary School are buildings too, and service openings in fire-resisting walls need checking after any refurbishment.
Mark Cross is about 4 miles east of Crowborough, in East Sussex. We carry out fire rated sealant for homes and businesses in Mark Cross, as part of our work across East Sussex. We cover 289 towns and villages across East Sussex, from the larger towns to small villages. Crawley is on our list too, about 20 miles from Mark Cross.
All of TN6 is covered for fire rated sealant, from the main roads to the quietest streets. If you’re just outside Mark Cross, we cover Town Row (1 mile south-west), The Platt (2 miles north), Argos Hill (2 miles south-west), Rotherfield (2 miles south-west) and Rusher's Cross (2 miles south-east). Within a short drive, we also cover Hailsham (14 miles south), Crowborough (4 miles west), Uckfield (9 miles south-west), Heathfield (7 miles south), Upper Horsebridge (13 miles south) and Hellingly (12 miles south).
Around Mark Cross
Around Mark Cross, our work takes us to homes and buildings near Eridge Park, The Lazy Fox pub and St Joseph Seminary. The nearest railway station is Wadhurst station, roughly 2.5 miles east. Well-known places in the area include Crowborough War Memorial Hospital (4.4 miles west). Open spaces near Mark Cross include Crowborough Country Park.
Why deal with it now?
Fire-rated sealants need more care than everyday sealant. Depth, backing and surface preparation all affect how a seal performs, and we work to the product details every time. Older cottages and farmhouses around Mark Cross can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins.
Why choose Mr Mastic in Mark Cross
- We never seal over old sealant
- Full insurance on every job
- 12-month guarantee on every job
- Rated 4.9 stars on Google
Take a look at how sealant jobs are priced and what customers say.
What the job involves on each surface
Door frames
A door can only do its job if the gap behind its frame is sealed too. We fill it with a fire-rated product suited to the materials either side.
Linear gaps
Long, narrow gaps appear where walls meet slabs and ceilings. We seal them to the tested detail, with backing where it’s needed.
How the visit works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes anything from a few hours to several days, depending on how many gaps there are from start to finish. In a small place like Mark Cross, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We plan the order of work and access, floor by floor or flat by flat.
- We take out any damaged or unsuitable sealant.
- 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
- Mention any tricky access
- Tell us about any water getting in
- Mention any parking rules near the property
Ask for a quote
There’s no standard price list. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.
Advice
For landlords and businesses
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.